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/*
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* Copyright 1996-2006 Sun Microsystems, Inc. All Rights Reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Sun designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Sun in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*/
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package java.io;
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import java.io.ObjectStreamClass.WeakClassKey;
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import java.lang.ref.ReferenceQueue;
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import java.lang.reflect.Array;
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import java.lang.reflect.Modifier;
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import java.lang.reflect.Proxy;
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import java.security.AccessControlContext;
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import java.security.AccessController;
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import java.security.PrivilegedAction;
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import java.security.PrivilegedActionException;
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import java.security.PrivilegedExceptionAction;
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import java.util.Arrays;
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import java.util.HashMap;
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import java.util.concurrent.ConcurrentHashMap;
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import java.util.concurrent.ConcurrentMap;
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import java.util.concurrent.atomic.AtomicBoolean;
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import static java.io.ObjectStreamClass.processQueue;
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/**
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* An ObjectInputStream deserializes primitive data and objects previously
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* written using an ObjectOutputStream.
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*
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* <p>ObjectOutputStream and ObjectInputStream can provide an application with
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* persistent storage for graphs of objects when used with a FileOutputStream
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* and FileInputStream respectively. ObjectInputStream is used to recover
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* those objects previously serialized. Other uses include passing objects
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* between hosts using a socket stream or for marshaling and unmarshaling
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* arguments and parameters in a remote communication system.
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*
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* <p>ObjectInputStream ensures that the types of all objects in the graph
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* created from the stream match the classes present in the Java Virtual
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* Machine. Classes are loaded as required using the standard mechanisms.
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*
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* <p>Only objects that support the java.io.Serializable or
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* java.io.Externalizable interface can be read from streams.
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*
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* <p>The method <code>readObject</code> is used to read an object from the
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* stream. Java's safe casting should be used to get the desired type. In
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* Java, strings and arrays are objects and are treated as objects during
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* serialization. When read they need to be cast to the expected type.
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*
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* <p>Primitive data types can be read from the stream using the appropriate
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* method on DataInput.
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*
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* <p>The default deserialization mechanism for objects restores the contents
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* of each field to the value and type it had when it was written. Fields
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* declared as transient or static are ignored by the deserialization process.
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* References to other objects cause those objects to be read from the stream
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* as necessary. Graphs of objects are restored correctly using a reference
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* sharing mechanism. New objects are always allocated when deserializing,
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* which prevents existing objects from being overwritten.
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*
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* <p>Reading an object is analogous to running the constructors of a new
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* object. Memory is allocated for the object and initialized to zero (NULL).
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* No-arg constructors are invoked for the non-serializable classes and then
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* the fields of the serializable classes are restored from the stream starting
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* with the serializable class closest to java.lang.object and finishing with
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* the object's most specific class.
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*
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* <p>For example to read from a stream as written by the example in
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* ObjectOutputStream:
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* <br>
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* <pre>
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* FileInputStream fis = new FileInputStream("t.tmp");
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* ObjectInputStream ois = new ObjectInputStream(fis);
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*
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* int i = ois.readInt();
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* String today = (String) ois.readObject();
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* Date date = (Date) ois.readObject();
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*
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* ois.close();
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* </pre>
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*
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* <p>Classes control how they are serialized by implementing either the
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* java.io.Serializable or java.io.Externalizable interfaces.
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*
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* <p>Implementing the Serializable interface allows object serialization to
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* save and restore the entire state of the object and it allows classes to
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* evolve between the time the stream is written and the time it is read. It
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* automatically traverses references between objects, saving and restoring
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* entire graphs.
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*
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* <p>Serializable classes that require special handling during the
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* serialization and deserialization process should implement the following
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* methods:<p>
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*
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* <pre>
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* private void writeObject(java.io.ObjectOutputStream stream)
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* throws IOException;
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* private void readObject(java.io.ObjectInputStream stream)
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* throws IOException, ClassNotFoundException;
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* private void readObjectNoData()
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* throws ObjectStreamException;
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* </pre>
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*
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* <p>The readObject method is responsible for reading and restoring the state
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* of the object for its particular class using data written to the stream by
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* the corresponding writeObject method. The method does not need to concern
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* itself with the state belonging to its superclasses or subclasses. State is
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* restored by reading data from the ObjectInputStream for the individual
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* fields and making assignments to the appropriate fields of the object.
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* Reading primitive data types is supported by DataInput.
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*
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* <p>Any attempt to read object data which exceeds the boundaries of the
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* custom data written by the corresponding writeObject method will cause an
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* OptionalDataException to be thrown with an eof field value of true.
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* Non-object reads which exceed the end of the allotted data will reflect the
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* end of data in the same way that they would indicate the end of the stream:
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* bytewise reads will return -1 as the byte read or number of bytes read, and
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* primitive reads will throw EOFExceptions. If there is no corresponding
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* writeObject method, then the end of default serialized data marks the end of
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* the allotted data.
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*
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* <p>Primitive and object read calls issued from within a readExternal method
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* behave in the same manner--if the stream is already positioned at the end of
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* data written by the corresponding writeExternal method, object reads will
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* throw OptionalDataExceptions with eof set to true, bytewise reads will
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* return -1, and primitive reads will throw EOFExceptions. Note that this
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* behavior does not hold for streams written with the old
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* <code>ObjectStreamConstants.PROTOCOL_VERSION_1</code> protocol, in which the
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* end of data written by writeExternal methods is not demarcated, and hence
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* cannot be detected.
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*
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* <p>The readObjectNoData method is responsible for initializing the state of
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* the object for its particular class in the event that the serialization
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* stream does not list the given class as a superclass of the object being
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* deserialized. This may occur in cases where the receiving party uses a
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* different version of the deserialized instance's class than the sending
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* party, and the receiver's version extends classes that are not extended by
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* the sender's version. This may also occur if the serialization stream has
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* been tampered; hence, readObjectNoData is useful for initializing
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* deserialized objects properly despite a "hostile" or incomplete source
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* stream.
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*
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* <p>Serialization does not read or assign values to the fields of any object
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* that does not implement the java.io.Serializable interface. Subclasses of
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* Objects that are not serializable can be serializable. In this case the
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* non-serializable class must have a no-arg constructor to allow its fields to
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* be initialized. In this case it is the responsibility of the subclass to
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* save and restore the state of the non-serializable class. It is frequently
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* the case that the fields of that class are accessible (public, package, or
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* protected) or that there are get and set methods that can be used to restore
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* the state.
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*
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* <p>Any exception that occurs while deserializing an object will be caught by
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* the ObjectInputStream and abort the reading process.
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*
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* <p>Implementing the Externalizable interface allows the object to assume
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* complete control over the contents and format of the object's serialized
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* form. The methods of the Externalizable interface, writeExternal and
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* readExternal, are called to save and restore the objects state. When
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* implemented by a class they can write and read their own state using all of
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* the methods of ObjectOutput and ObjectInput. It is the responsibility of
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* the objects to handle any versioning that occurs.
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*
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* <p>Enum constants are deserialized differently than ordinary serializable or
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* externalizable objects. The serialized form of an enum constant consists
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* solely of its name; field values of the constant are not transmitted. To
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* deserialize an enum constant, ObjectInputStream reads the constant name from
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* the stream; the deserialized constant is then obtained by calling the static
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* method <code>Enum.valueOf(Class, String)</code> with the enum constant's
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* base type and the received constant name as arguments. Like other
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* serializable or externalizable objects, enum constants can function as the
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* targets of back references appearing subsequently in the serialization
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* stream. The process by which enum constants are deserialized cannot be
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* customized: any class-specific readObject, readObjectNoData, and readResolve
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* methods defined by enum types are ignored during deserialization.
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* Similarly, any serialPersistentFields or serialVersionUID field declarations
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* are also ignored--all enum types have a fixed serialVersionUID of 0L.
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*
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* @author Mike Warres
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* @author Roger Riggs
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* @see java.io.DataInput
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* @see java.io.ObjectOutputStream
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* @see java.io.Serializable
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* @see <a href="../../../platform/serialization/spec/input.html"> Object Serialization Specification, Section 3, Object Input Classes</a>
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* @since JDK1.1
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*/
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public class ObjectInputStream
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extends InputStream implements ObjectInput, ObjectStreamConstants
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{
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/** handle value representing null */
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private static final int NULL_HANDLE = -1;
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/** marker for unshared objects in internal handle table */
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private static final Object unsharedMarker = new Object();
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/** table mapping primitive type names to corresponding class objects */
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private static final HashMap<String, Class<?>> primClasses
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= new HashMap<String, Class<?>>(8, 1.0F);
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static {
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primClasses.put("boolean", boolean.class);
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primClasses.put("byte", byte.class);
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primClasses.put("char", char.class);
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primClasses.put("short", short.class);
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primClasses.put("int", int.class);
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primClasses.put("long", long.class);
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primClasses.put("float", float.class);
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primClasses.put("double", double.class);
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primClasses.put("void", void.class);
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}
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private static class Caches {
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/** cache of subclass security audit results */
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static final ConcurrentMap<WeakClassKey,Boolean> subclassAudits =
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new ConcurrentHashMap<WeakClassKey,Boolean>();
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/** queue for WeakReferences to audited subclasses */
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static final ReferenceQueue<Class<?>> subclassAuditsQueue =
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new ReferenceQueue<Class<?>>();
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}
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/** filter stream for handling block data conversion */
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private final BlockDataInputStream bin;
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/** validation callback list */
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private final ValidationList vlist;
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/** recursion depth */
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private int depth;
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/** whether stream is closed */
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private boolean closed;
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/** wire handle -> obj/exception map */
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private final HandleTable handles;
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/** scratch field for passing handle values up/down call stack */
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private int passHandle = NULL_HANDLE;
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/** flag set when at end of field value block with no TC_ENDBLOCKDATA */
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private boolean defaultDataEnd = false;
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/** buffer for reading primitive field values */
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private byte[] primVals;
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/** if true, invoke readObjectOverride() instead of readObject() */
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private final boolean enableOverride;
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/** if true, invoke resolveObject() */
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private boolean enableResolve;
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/**
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* Context during upcalls to class-defined readObject methods; holds
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* object currently being deserialized and descriptor for current class.
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* Null when not during readObject upcall.
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*/
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private CallbackContext curContext;
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/**
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* Creates an ObjectInputStream that reads from the specified InputStream.
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* A serialization stream header is read from the stream and verified.
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* This constructor will block until the corresponding ObjectOutputStream
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* has written and flushed the header.
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*
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* <p>If a security manager is installed, this constructor will check for
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* the "enableSubclassImplementation" SerializablePermission when invoked
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* directly or indirectly by the constructor of a subclass which overrides
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* the ObjectInputStream.readFields or ObjectInputStream.readUnshared
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* methods.
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*
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* @param in input stream to read from
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* @throws StreamCorruptedException if the stream header is incorrect
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* @throws IOException if an I/O error occurs while reading stream header
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* @throws SecurityException if untrusted subclass illegally overrides
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* security-sensitive methods
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* @throws NullPointerException if <code>in</code> is <code>null</code>
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* @see ObjectInputStream#ObjectInputStream()
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* @see ObjectInputStream#readFields()
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* @see ObjectOutputStream#ObjectOutputStream(OutputStream)
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*/
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public ObjectInputStream(InputStream in) throws IOException {
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verifySubclass();
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bin = new BlockDataInputStream(in);
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handles = new HandleTable(10);
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vlist = new ValidationList();
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enableOverride = false;
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readStreamHeader();
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bin.setBlockDataMode(true);
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}
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/**
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* Provide a way for subclasses that are completely reimplementing
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* ObjectInputStream to not have to allocate private data just used by this
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* implementation of ObjectInputStream.
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*
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* <p>If there is a security manager installed, this method first calls the
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* security manager's <code>checkPermission</code> method with the
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* <code>SerializablePermission("enableSubclassImplementation")</code>
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* permission to ensure it's ok to enable subclassing.
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*
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* @throws SecurityException if a security manager exists and its
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* <code>checkPermission</code> method denies enabling
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* subclassing.
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* @see SecurityManager#checkPermission
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* @see java.io.SerializablePermission
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*/
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protected ObjectInputStream() throws IOException, SecurityException {
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SecurityManager sm = System.getSecurityManager();
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if (sm != null) {
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sm.checkPermission(SUBCLASS_IMPLEMENTATION_PERMISSION);
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}
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bin = null;
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handles = null;
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vlist = null;
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enableOverride = true;
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}
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/**
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* Read an object from the ObjectInputStream. The class of the object, the
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* signature of the class, and the values of the non-transient and
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* non-static fields of the class and all of its supertypes are read.
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* Default deserializing for a class can be overriden using the writeObject
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* and readObject methods. Objects referenced by this object are read
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* transitively so that a complete equivalent graph of objects is
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* reconstructed by readObject.
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*
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* <p>The root object is completely restored when all of its fields and the
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* objects it references are completely restored. At this point the object
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* validation callbacks are executed in order based on their registered
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* priorities. The callbacks are registered by objects (in the readObject
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* special methods) as they are individually restored.
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*
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* <p>Exceptions are thrown for problems with the InputStream and for
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* classes that should not be deserialized. All exceptions are fatal to
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* the InputStream and leave it in an indeterminate state; it is up to the
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* caller to ignore or recover the stream state.
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*
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* @throws ClassNotFoundException Class of a serialized object cannot be
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* found.
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* @throws InvalidClassException Something is wrong with a class used by
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* serialization.
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* @throws StreamCorruptedException Control information in the
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* stream is inconsistent.
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* @throws OptionalDataException Primitive data was found in the
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* stream instead of objects.
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* @throws IOException Any of the usual Input/Output related exceptions.
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*/
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public final Object readObject()
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throws IOException, ClassNotFoundException
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{
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if (enableOverride) {
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|
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return readObjectOverride();
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|
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}
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// if nested read, passHandle contains handle of enclosing object
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int outerHandle = passHandle;
|
|
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try {
|
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Object obj = readObject0(false);
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|
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handles.markDependency(outerHandle, passHandle);
|
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ClassNotFoundException ex = handles.lookupException(passHandle);
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|
372 |
if (ex != null) {
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throw ex;
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}
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if (depth == 0) {
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vlist.doCallbacks();
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}
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return obj;
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} finally {
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380 |
passHandle = outerHandle;
|
|
381 |
if (closed && depth == 0) {
|
|
382 |
clear();
|
|
383 |
}
|
|
384 |
}
|
|
385 |
}
|
|
386 |
|
|
387 |
/**
|
|
388 |
* This method is called by trusted subclasses of ObjectOutputStream that
|
|
389 |
* constructed ObjectOutputStream using the protected no-arg constructor.
|
|
390 |
* The subclass is expected to provide an override method with the modifier
|
|
391 |
* "final".
|
|
392 |
*
|
|
393 |
* @return the Object read from the stream.
|
|
394 |
* @throws ClassNotFoundException Class definition of a serialized object
|
|
395 |
* cannot be found.
|
|
396 |
* @throws OptionalDataException Primitive data was found in the stream
|
|
397 |
* instead of objects.
|
|
398 |
* @throws IOException if I/O errors occurred while reading from the
|
|
399 |
* underlying stream
|
|
400 |
* @see #ObjectInputStream()
|
|
401 |
* @see #readObject()
|
|
402 |
* @since 1.2
|
|
403 |
*/
|
|
404 |
protected Object readObjectOverride()
|
|
405 |
throws IOException, ClassNotFoundException
|
|
406 |
{
|
|
407 |
return null;
|
|
408 |
}
|
|
409 |
|
|
410 |
/**
|
|
411 |
* Reads an "unshared" object from the ObjectInputStream. This method is
|
|
412 |
* identical to readObject, except that it prevents subsequent calls to
|
|
413 |
* readObject and readUnshared from returning additional references to the
|
|
414 |
* deserialized instance obtained via this call. Specifically:
|
|
415 |
* <ul>
|
|
416 |
* <li>If readUnshared is called to deserialize a back-reference (the
|
|
417 |
* stream representation of an object which has been written
|
|
418 |
* previously to the stream), an ObjectStreamException will be
|
|
419 |
* thrown.
|
|
420 |
*
|
|
421 |
* <li>If readUnshared returns successfully, then any subsequent attempts
|
|
422 |
* to deserialize back-references to the stream handle deserialized
|
|
423 |
* by readUnshared will cause an ObjectStreamException to be thrown.
|
|
424 |
* </ul>
|
|
425 |
* Deserializing an object via readUnshared invalidates the stream handle
|
|
426 |
* associated with the returned object. Note that this in itself does not
|
|
427 |
* always guarantee that the reference returned by readUnshared is unique;
|
|
428 |
* the deserialized object may define a readResolve method which returns an
|
|
429 |
* object visible to other parties, or readUnshared may return a Class
|
|
430 |
* object or enum constant obtainable elsewhere in the stream or through
|
|
431 |
* external means. If the deserialized object defines a readResolve method
|
|
432 |
* and the invocation of that method returns an array, then readUnshared
|
|
433 |
* returns a shallow clone of that array; this guarantees that the returned
|
|
434 |
* array object is unique and cannot be obtained a second time from an
|
|
435 |
* invocation of readObject or readUnshared on the ObjectInputStream,
|
|
436 |
* even if the underlying data stream has been manipulated.
|
|
437 |
*
|
|
438 |
* <p>ObjectInputStream subclasses which override this method can only be
|
|
439 |
* constructed in security contexts possessing the
|
|
440 |
* "enableSubclassImplementation" SerializablePermission; any attempt to
|
|
441 |
* instantiate such a subclass without this permission will cause a
|
|
442 |
* SecurityException to be thrown.
|
|
443 |
*
|
|
444 |
* @return reference to deserialized object
|
|
445 |
* @throws ClassNotFoundException if class of an object to deserialize
|
|
446 |
* cannot be found
|
|
447 |
* @throws StreamCorruptedException if control information in the stream
|
|
448 |
* is inconsistent
|
|
449 |
* @throws ObjectStreamException if object to deserialize has already
|
|
450 |
* appeared in stream
|
|
451 |
* @throws OptionalDataException if primitive data is next in stream
|
|
452 |
* @throws IOException if an I/O error occurs during deserialization
|
|
453 |
* @since 1.4
|
|
454 |
*/
|
|
455 |
public Object readUnshared() throws IOException, ClassNotFoundException {
|
|
456 |
// if nested read, passHandle contains handle of enclosing object
|
|
457 |
int outerHandle = passHandle;
|
|
458 |
try {
|
|
459 |
Object obj = readObject0(true);
|
|
460 |
handles.markDependency(outerHandle, passHandle);
|
|
461 |
ClassNotFoundException ex = handles.lookupException(passHandle);
|
|
462 |
if (ex != null) {
|
|
463 |
throw ex;
|
|
464 |
}
|
|
465 |
if (depth == 0) {
|
|
466 |
vlist.doCallbacks();
|
|
467 |
}
|
|
468 |
return obj;
|
|
469 |
} finally {
|
|
470 |
passHandle = outerHandle;
|
|
471 |
if (closed && depth == 0) {
|
|
472 |
clear();
|
|
473 |
}
|
|
474 |
}
|
|
475 |
}
|
|
476 |
|
|
477 |
/**
|
|
478 |
* Read the non-static and non-transient fields of the current class from
|
|
479 |
* this stream. This may only be called from the readObject method of the
|
|
480 |
* class being deserialized. It will throw the NotActiveException if it is
|
|
481 |
* called otherwise.
|
|
482 |
*
|
|
483 |
* @throws ClassNotFoundException if the class of a serialized object
|
|
484 |
* could not be found.
|
|
485 |
* @throws IOException if an I/O error occurs.
|
|
486 |
* @throws NotActiveException if the stream is not currently reading
|
|
487 |
* objects.
|
|
488 |
*/
|
|
489 |
public void defaultReadObject()
|
|
490 |
throws IOException, ClassNotFoundException
|
|
491 |
{
|
|
492 |
if (curContext == null) {
|
|
493 |
throw new NotActiveException("not in call to readObject");
|
|
494 |
}
|
|
495 |
Object curObj = curContext.getObj();
|
|
496 |
ObjectStreamClass curDesc = curContext.getDesc();
|
|
497 |
bin.setBlockDataMode(false);
|
|
498 |
defaultReadFields(curObj, curDesc);
|
|
499 |
bin.setBlockDataMode(true);
|
|
500 |
if (!curDesc.hasWriteObjectData()) {
|
|
501 |
/*
|
|
502 |
* Fix for 4360508: since stream does not contain terminating
|
|
503 |
* TC_ENDBLOCKDATA tag, set flag so that reading code elsewhere
|
|
504 |
* knows to simulate end-of-custom-data behavior.
|
|
505 |
*/
|
|
506 |
defaultDataEnd = true;
|
|
507 |
}
|
|
508 |
ClassNotFoundException ex = handles.lookupException(passHandle);
|
|
509 |
if (ex != null) {
|
|
510 |
throw ex;
|
|
511 |
}
|
|
512 |
}
|
|
513 |
|
|
514 |
/**
|
|
515 |
* Reads the persistent fields from the stream and makes them available by
|
|
516 |
* name.
|
|
517 |
*
|
|
518 |
* @return the <code>GetField</code> object representing the persistent
|
|
519 |
* fields of the object being deserialized
|
|
520 |
* @throws ClassNotFoundException if the class of a serialized object
|
|
521 |
* could not be found.
|
|
522 |
* @throws IOException if an I/O error occurs.
|
|
523 |
* @throws NotActiveException if the stream is not currently reading
|
|
524 |
* objects.
|
|
525 |
* @since 1.2
|
|
526 |
*/
|
|
527 |
public ObjectInputStream.GetField readFields()
|
|
528 |
throws IOException, ClassNotFoundException
|
|
529 |
{
|
|
530 |
if (curContext == null) {
|
|
531 |
throw new NotActiveException("not in call to readObject");
|
|
532 |
}
|
|
533 |
Object curObj = curContext.getObj();
|
|
534 |
ObjectStreamClass curDesc = curContext.getDesc();
|
|
535 |
bin.setBlockDataMode(false);
|
|
536 |
GetFieldImpl getField = new GetFieldImpl(curDesc);
|
|
537 |
getField.readFields();
|
|
538 |
bin.setBlockDataMode(true);
|
|
539 |
if (!curDesc.hasWriteObjectData()) {
|
|
540 |
/*
|
|
541 |
* Fix for 4360508: since stream does not contain terminating
|
|
542 |
* TC_ENDBLOCKDATA tag, set flag so that reading code elsewhere
|
|
543 |
* knows to simulate end-of-custom-data behavior.
|
|
544 |
*/
|
|
545 |
defaultDataEnd = true;
|
|
546 |
}
|
|
547 |
|
|
548 |
return getField;
|
|
549 |
}
|
|
550 |
|
|
551 |
/**
|
|
552 |
* Register an object to be validated before the graph is returned. While
|
|
553 |
* similar to resolveObject these validations are called after the entire
|
|
554 |
* graph has been reconstituted. Typically, a readObject method will
|
|
555 |
* register the object with the stream so that when all of the objects are
|
|
556 |
* restored a final set of validations can be performed.
|
|
557 |
*
|
|
558 |
* @param obj the object to receive the validation callback.
|
|
559 |
* @param prio controls the order of callbacks;zero is a good default.
|
|
560 |
* Use higher numbers to be called back earlier, lower numbers for
|
|
561 |
* later callbacks. Within a priority, callbacks are processed in
|
|
562 |
* no particular order.
|
|
563 |
* @throws NotActiveException The stream is not currently reading objects
|
|
564 |
* so it is invalid to register a callback.
|
|
565 |
* @throws InvalidObjectException The validation object is null.
|
|
566 |
*/
|
|
567 |
public void registerValidation(ObjectInputValidation obj, int prio)
|
|
568 |
throws NotActiveException, InvalidObjectException
|
|
569 |
{
|
|
570 |
if (depth == 0) {
|
|
571 |
throw new NotActiveException("stream inactive");
|
|
572 |
}
|
|
573 |
vlist.register(obj, prio);
|
|
574 |
}
|
|
575 |
|
|
576 |
/**
|
|
577 |
* Load the local class equivalent of the specified stream class
|
|
578 |
* description. Subclasses may implement this method to allow classes to
|
|
579 |
* be fetched from an alternate source.
|
|
580 |
*
|
|
581 |
* <p>The corresponding method in <code>ObjectOutputStream</code> is
|
|
582 |
* <code>annotateClass</code>. This method will be invoked only once for
|
|
583 |
* each unique class in the stream. This method can be implemented by
|
|
584 |
* subclasses to use an alternate loading mechanism but must return a
|
|
585 |
* <code>Class</code> object. Once returned, if the class is not an array
|
|
586 |
* class, its serialVersionUID is compared to the serialVersionUID of the
|
|
587 |
* serialized class, and if there is a mismatch, the deserialization fails
|
|
588 |
* and an {@link InvalidClassException} is thrown.
|
|
589 |
*
|
|
590 |
* <p>The default implementation of this method in
|
|
591 |
* <code>ObjectInputStream</code> returns the result of calling
|
|
592 |
* <pre>
|
|
593 |
* Class.forName(desc.getName(), false, loader)
|
|
594 |
* </pre>
|
|
595 |
* where <code>loader</code> is determined as follows: if there is a
|
|
596 |
* method on the current thread's stack whose declaring class was
|
|
597 |
* defined by a user-defined class loader (and was not a generated to
|
|
598 |
* implement reflective invocations), then <code>loader</code> is class
|
|
599 |
* loader corresponding to the closest such method to the currently
|
|
600 |
* executing frame; otherwise, <code>loader</code> is
|
|
601 |
* <code>null</code>. If this call results in a
|
|
602 |
* <code>ClassNotFoundException</code> and the name of the passed
|
|
603 |
* <code>ObjectStreamClass</code> instance is the Java language keyword
|
|
604 |
* for a primitive type or void, then the <code>Class</code> object
|
|
605 |
* representing that primitive type or void will be returned
|
|
606 |
* (e.g., an <code>ObjectStreamClass</code> with the name
|
|
607 |
* <code>"int"</code> will be resolved to <code>Integer.TYPE</code>).
|
|
608 |
* Otherwise, the <code>ClassNotFoundException</code> will be thrown to
|
|
609 |
* the caller of this method.
|
|
610 |
*
|
|
611 |
* @param desc an instance of class <code>ObjectStreamClass</code>
|
|
612 |
* @return a <code>Class</code> object corresponding to <code>desc</code>
|
|
613 |
* @throws IOException any of the usual Input/Output exceptions.
|
|
614 |
* @throws ClassNotFoundException if class of a serialized object cannot
|
|
615 |
* be found.
|
|
616 |
*/
|
|
617 |
protected Class<?> resolveClass(ObjectStreamClass desc)
|
|
618 |
throws IOException, ClassNotFoundException
|
|
619 |
{
|
|
620 |
String name = desc.getName();
|
|
621 |
try {
|
|
622 |
return Class.forName(name, false, latestUserDefinedLoader());
|
|
623 |
} catch (ClassNotFoundException ex) {
|
51
|
624 |
Class<?> cl = primClasses.get(name);
|
2
|
625 |
if (cl != null) {
|
|
626 |
return cl;
|
|
627 |
} else {
|
|
628 |
throw ex;
|
|
629 |
}
|
|
630 |
}
|
|
631 |
}
|
|
632 |
|
|
633 |
/**
|
|
634 |
* Returns a proxy class that implements the interfaces named in a proxy
|
|
635 |
* class descriptor; subclasses may implement this method to read custom
|
|
636 |
* data from the stream along with the descriptors for dynamic proxy
|
|
637 |
* classes, allowing them to use an alternate loading mechanism for the
|
|
638 |
* interfaces and the proxy class.
|
|
639 |
*
|
|
640 |
* <p>This method is called exactly once for each unique proxy class
|
|
641 |
* descriptor in the stream.
|
|
642 |
*
|
|
643 |
* <p>The corresponding method in <code>ObjectOutputStream</code> is
|
|
644 |
* <code>annotateProxyClass</code>. For a given subclass of
|
|
645 |
* <code>ObjectInputStream</code> that overrides this method, the
|
|
646 |
* <code>annotateProxyClass</code> method in the corresponding subclass of
|
|
647 |
* <code>ObjectOutputStream</code> must write any data or objects read by
|
|
648 |
* this method.
|
|
649 |
*
|
|
650 |
* <p>The default implementation of this method in
|
|
651 |
* <code>ObjectInputStream</code> returns the result of calling
|
|
652 |
* <code>Proxy.getProxyClass</code> with the list of <code>Class</code>
|
|
653 |
* objects for the interfaces that are named in the <code>interfaces</code>
|
|
654 |
* parameter. The <code>Class</code> object for each interface name
|
|
655 |
* <code>i</code> is the value returned by calling
|
|
656 |
* <pre>
|
|
657 |
* Class.forName(i, false, loader)
|
|
658 |
* </pre>
|
|
659 |
* where <code>loader</code> is that of the first non-<code>null</code>
|
|
660 |
* class loader up the execution stack, or <code>null</code> if no
|
|
661 |
* non-<code>null</code> class loaders are on the stack (the same class
|
|
662 |
* loader choice used by the <code>resolveClass</code> method). Unless any
|
|
663 |
* of the resolved interfaces are non-public, this same value of
|
|
664 |
* <code>loader</code> is also the class loader passed to
|
|
665 |
* <code>Proxy.getProxyClass</code>; if non-public interfaces are present,
|
|
666 |
* their class loader is passed instead (if more than one non-public
|
|
667 |
* interface class loader is encountered, an
|
|
668 |
* <code>IllegalAccessError</code> is thrown).
|
|
669 |
* If <code>Proxy.getProxyClass</code> throws an
|
|
670 |
* <code>IllegalArgumentException</code>, <code>resolveProxyClass</code>
|
|
671 |
* will throw a <code>ClassNotFoundException</code> containing the
|
|
672 |
* <code>IllegalArgumentException</code>.
|
|
673 |
*
|
|
674 |
* @param interfaces the list of interface names that were
|
|
675 |
* deserialized in the proxy class descriptor
|
|
676 |
* @return a proxy class for the specified interfaces
|
|
677 |
* @throws IOException any exception thrown by the underlying
|
|
678 |
* <code>InputStream</code>
|
|
679 |
* @throws ClassNotFoundException if the proxy class or any of the
|
|
680 |
* named interfaces could not be found
|
|
681 |
* @see ObjectOutputStream#annotateProxyClass(Class)
|
|
682 |
* @since 1.3
|
|
683 |
*/
|
|
684 |
protected Class<?> resolveProxyClass(String[] interfaces)
|
|
685 |
throws IOException, ClassNotFoundException
|
|
686 |
{
|
|
687 |
ClassLoader latestLoader = latestUserDefinedLoader();
|
|
688 |
ClassLoader nonPublicLoader = null;
|
|
689 |
boolean hasNonPublicInterface = false;
|
|
690 |
|
|
691 |
// define proxy in class loader of non-public interface(s), if any
|
|
692 |
Class[] classObjs = new Class[interfaces.length];
|
|
693 |
for (int i = 0; i < interfaces.length; i++) {
|
|
694 |
Class cl = Class.forName(interfaces[i], false, latestLoader);
|
|
695 |
if ((cl.getModifiers() & Modifier.PUBLIC) == 0) {
|
|
696 |
if (hasNonPublicInterface) {
|
|
697 |
if (nonPublicLoader != cl.getClassLoader()) {
|
|
698 |
throw new IllegalAccessError(
|
|
699 |
"conflicting non-public interface class loaders");
|
|
700 |
}
|
|
701 |
} else {
|
|
702 |
nonPublicLoader = cl.getClassLoader();
|
|
703 |
hasNonPublicInterface = true;
|
|
704 |
}
|
|
705 |
}
|
|
706 |
classObjs[i] = cl;
|
|
707 |
}
|
|
708 |
try {
|
|
709 |
return Proxy.getProxyClass(
|
|
710 |
hasNonPublicInterface ? nonPublicLoader : latestLoader,
|
|
711 |
classObjs);
|
|
712 |
} catch (IllegalArgumentException e) {
|
|
713 |
throw new ClassNotFoundException(null, e);
|
|
714 |
}
|
|
715 |
}
|
|
716 |
|
|
717 |
/**
|
|
718 |
* This method will allow trusted subclasses of ObjectInputStream to
|
|
719 |
* substitute one object for another during deserialization. Replacing
|
|
720 |
* objects is disabled until enableResolveObject is called. The
|
|
721 |
* enableResolveObject method checks that the stream requesting to resolve
|
|
722 |
* object can be trusted. Every reference to serializable objects is passed
|
|
723 |
* to resolveObject. To insure that the private state of objects is not
|
|
724 |
* unintentionally exposed only trusted streams may use resolveObject.
|
|
725 |
*
|
|
726 |
* <p>This method is called after an object has been read but before it is
|
|
727 |
* returned from readObject. The default resolveObject method just returns
|
|
728 |
* the same object.
|
|
729 |
*
|
|
730 |
* <p>When a subclass is replacing objects it must insure that the
|
|
731 |
* substituted object is compatible with every field where the reference
|
|
732 |
* will be stored. Objects whose type is not a subclass of the type of the
|
|
733 |
* field or array element abort the serialization by raising an exception
|
|
734 |
* and the object is not be stored.
|
|
735 |
*
|
|
736 |
* <p>This method is called only once when each object is first
|
|
737 |
* encountered. All subsequent references to the object will be redirected
|
|
738 |
* to the new object.
|
|
739 |
*
|
|
740 |
* @param obj object to be substituted
|
|
741 |
* @return the substituted object
|
|
742 |
* @throws IOException Any of the usual Input/Output exceptions.
|
|
743 |
*/
|
|
744 |
protected Object resolveObject(Object obj) throws IOException {
|
|
745 |
return obj;
|
|
746 |
}
|
|
747 |
|
|
748 |
/**
|
|
749 |
* Enable the stream to allow objects read from the stream to be replaced.
|
|
750 |
* When enabled, the resolveObject method is called for every object being
|
|
751 |
* deserialized.
|
|
752 |
*
|
|
753 |
* <p>If <i>enable</i> is true, and there is a security manager installed,
|
|
754 |
* this method first calls the security manager's
|
|
755 |
* <code>checkPermission</code> method with the
|
|
756 |
* <code>SerializablePermission("enableSubstitution")</code> permission to
|
|
757 |
* ensure it's ok to enable the stream to allow objects read from the
|
|
758 |
* stream to be replaced.
|
|
759 |
*
|
|
760 |
* @param enable true for enabling use of <code>resolveObject</code> for
|
|
761 |
* every object being deserialized
|
|
762 |
* @return the previous setting before this method was invoked
|
|
763 |
* @throws SecurityException if a security manager exists and its
|
|
764 |
* <code>checkPermission</code> method denies enabling the stream
|
|
765 |
* to allow objects read from the stream to be replaced.
|
|
766 |
* @see SecurityManager#checkPermission
|
|
767 |
* @see java.io.SerializablePermission
|
|
768 |
*/
|
|
769 |
protected boolean enableResolveObject(boolean enable)
|
|
770 |
throws SecurityException
|
|
771 |
{
|
|
772 |
if (enable == enableResolve) {
|
|
773 |
return enable;
|
|
774 |
}
|
|
775 |
if (enable) {
|
|
776 |
SecurityManager sm = System.getSecurityManager();
|
|
777 |
if (sm != null) {
|
|
778 |
sm.checkPermission(SUBSTITUTION_PERMISSION);
|
|
779 |
}
|
|
780 |
}
|
|
781 |
enableResolve = enable;
|
|
782 |
return !enableResolve;
|
|
783 |
}
|
|
784 |
|
|
785 |
/**
|
|
786 |
* The readStreamHeader method is provided to allow subclasses to read and
|
|
787 |
* verify their own stream headers. It reads and verifies the magic number
|
|
788 |
* and version number.
|
|
789 |
*
|
|
790 |
* @throws IOException if there are I/O errors while reading from the
|
|
791 |
* underlying <code>InputStream</code>
|
|
792 |
* @throws StreamCorruptedException if control information in the stream
|
|
793 |
* is inconsistent
|
|
794 |
*/
|
|
795 |
protected void readStreamHeader()
|
|
796 |
throws IOException, StreamCorruptedException
|
|
797 |
{
|
|
798 |
short s0 = bin.readShort();
|
|
799 |
short s1 = bin.readShort();
|
|
800 |
if (s0 != STREAM_MAGIC || s1 != STREAM_VERSION) {
|
|
801 |
throw new StreamCorruptedException(
|
|
802 |
String.format("invalid stream header: %04X%04X", s0, s1));
|
|
803 |
}
|
|
804 |
}
|
|
805 |
|
|
806 |
/**
|
|
807 |
* Read a class descriptor from the serialization stream. This method is
|
|
808 |
* called when the ObjectInputStream expects a class descriptor as the next
|
|
809 |
* item in the serialization stream. Subclasses of ObjectInputStream may
|
|
810 |
* override this method to read in class descriptors that have been written
|
|
811 |
* in non-standard formats (by subclasses of ObjectOutputStream which have
|
|
812 |
* overridden the <code>writeClassDescriptor</code> method). By default,
|
|
813 |
* this method reads class descriptors according to the format defined in
|
|
814 |
* the Object Serialization specification.
|
|
815 |
*
|
|
816 |
* @return the class descriptor read
|
|
817 |
* @throws IOException If an I/O error has occurred.
|
|
818 |
* @throws ClassNotFoundException If the Class of a serialized object used
|
|
819 |
* in the class descriptor representation cannot be found
|
|
820 |
* @see java.io.ObjectOutputStream#writeClassDescriptor(java.io.ObjectStreamClass)
|
|
821 |
* @since 1.3
|
|
822 |
*/
|
|
823 |
protected ObjectStreamClass readClassDescriptor()
|
|
824 |
throws IOException, ClassNotFoundException
|
|
825 |
{
|
|
826 |
ObjectStreamClass desc = new ObjectStreamClass();
|
|
827 |
desc.readNonProxy(this);
|
|
828 |
return desc;
|
|
829 |
}
|
|
830 |
|
|
831 |
/**
|
|
832 |
* Reads a byte of data. This method will block if no input is available.
|
|
833 |
*
|
|
834 |
* @return the byte read, or -1 if the end of the stream is reached.
|
|
835 |
* @throws IOException If an I/O error has occurred.
|
|
836 |
*/
|
|
837 |
public int read() throws IOException {
|
|
838 |
return bin.read();
|
|
839 |
}
|
|
840 |
|
|
841 |
/**
|
|
842 |
* Reads into an array of bytes. This method will block until some input
|
|
843 |
* is available. Consider using java.io.DataInputStream.readFully to read
|
|
844 |
* exactly 'length' bytes.
|
|
845 |
*
|
|
846 |
* @param buf the buffer into which the data is read
|
|
847 |
* @param off the start offset of the data
|
|
848 |
* @param len the maximum number of bytes read
|
|
849 |
* @return the actual number of bytes read, -1 is returned when the end of
|
|
850 |
* the stream is reached.
|
|
851 |
* @throws IOException If an I/O error has occurred.
|
|
852 |
* @see java.io.DataInputStream#readFully(byte[],int,int)
|
|
853 |
*/
|
|
854 |
public int read(byte[] buf, int off, int len) throws IOException {
|
|
855 |
if (buf == null) {
|
|
856 |
throw new NullPointerException();
|
|
857 |
}
|
|
858 |
int endoff = off + len;
|
|
859 |
if (off < 0 || len < 0 || endoff > buf.length || endoff < 0) {
|
|
860 |
throw new IndexOutOfBoundsException();
|
|
861 |
}
|
|
862 |
return bin.read(buf, off, len, false);
|
|
863 |
}
|
|
864 |
|
|
865 |
/**
|
|
866 |
* Returns the number of bytes that can be read without blocking.
|
|
867 |
*
|
|
868 |
* @return the number of available bytes.
|
|
869 |
* @throws IOException if there are I/O errors while reading from the
|
|
870 |
* underlying <code>InputStream</code>
|
|
871 |
*/
|
|
872 |
public int available() throws IOException {
|
|
873 |
return bin.available();
|
|
874 |
}
|
|
875 |
|
|
876 |
/**
|
|
877 |
* Closes the input stream. Must be called to release any resources
|
|
878 |
* associated with the stream.
|
|
879 |
*
|
|
880 |
* @throws IOException If an I/O error has occurred.
|
|
881 |
*/
|
|
882 |
public void close() throws IOException {
|
|
883 |
/*
|
|
884 |
* Even if stream already closed, propagate redundant close to
|
|
885 |
* underlying stream to stay consistent with previous implementations.
|
|
886 |
*/
|
|
887 |
closed = true;
|
|
888 |
if (depth == 0) {
|
|
889 |
clear();
|
|
890 |
}
|
|
891 |
bin.close();
|
|
892 |
}
|
|
893 |
|
|
894 |
/**
|
|
895 |
* Reads in a boolean.
|
|
896 |
*
|
|
897 |
* @return the boolean read.
|
|
898 |
* @throws EOFException If end of file is reached.
|
|
899 |
* @throws IOException If other I/O error has occurred.
|
|
900 |
*/
|
|
901 |
public boolean readBoolean() throws IOException {
|
|
902 |
return bin.readBoolean();
|
|
903 |
}
|
|
904 |
|
|
905 |
/**
|
|
906 |
* Reads an 8 bit byte.
|
|
907 |
*
|
|
908 |
* @return the 8 bit byte read.
|
|
909 |
* @throws EOFException If end of file is reached.
|
|
910 |
* @throws IOException If other I/O error has occurred.
|
|
911 |
*/
|
|
912 |
public byte readByte() throws IOException {
|
|
913 |
return bin.readByte();
|
|
914 |
}
|
|
915 |
|
|
916 |
/**
|
|
917 |
* Reads an unsigned 8 bit byte.
|
|
918 |
*
|
|
919 |
* @return the 8 bit byte read.
|
|
920 |
* @throws EOFException If end of file is reached.
|
|
921 |
* @throws IOException If other I/O error has occurred.
|
|
922 |
*/
|
|
923 |
public int readUnsignedByte() throws IOException {
|
|
924 |
return bin.readUnsignedByte();
|
|
925 |
}
|
|
926 |
|
|
927 |
/**
|
|
928 |
* Reads a 16 bit char.
|
|
929 |
*
|
|
930 |
* @return the 16 bit char read.
|
|
931 |
* @throws EOFException If end of file is reached.
|
|
932 |
* @throws IOException If other I/O error has occurred.
|
|
933 |
*/
|
|
934 |
public char readChar() throws IOException {
|
|
935 |
return bin.readChar();
|
|
936 |
}
|
|
937 |
|
|
938 |
/**
|
|
939 |
* Reads a 16 bit short.
|
|
940 |
*
|
|
941 |
* @return the 16 bit short read.
|
|
942 |
* @throws EOFException If end of file is reached.
|
|
943 |
* @throws IOException If other I/O error has occurred.
|
|
944 |
*/
|
|
945 |
public short readShort() throws IOException {
|
|
946 |
return bin.readShort();
|
|
947 |
}
|
|
948 |
|
|
949 |
/**
|
|
950 |
* Reads an unsigned 16 bit short.
|
|
951 |
*
|
|
952 |
* @return the 16 bit short read.
|
|
953 |
* @throws EOFException If end of file is reached.
|
|
954 |
* @throws IOException If other I/O error has occurred.
|
|
955 |
*/
|
|
956 |
public int readUnsignedShort() throws IOException {
|
|
957 |
return bin.readUnsignedShort();
|
|
958 |
}
|
|
959 |
|
|
960 |
/**
|
|
961 |
* Reads a 32 bit int.
|
|
962 |
*
|
|
963 |
* @return the 32 bit integer read.
|
|
964 |
* @throws EOFException If end of file is reached.
|
|
965 |
* @throws IOException If other I/O error has occurred.
|
|
966 |
*/
|
|
967 |
public int readInt() throws IOException {
|
|
968 |
return bin.readInt();
|
|
969 |
}
|
|
970 |
|
|
971 |
/**
|
|
972 |
* Reads a 64 bit long.
|
|
973 |
*
|
|
974 |
* @return the read 64 bit long.
|
|
975 |
* @throws EOFException If end of file is reached.
|
|
976 |
* @throws IOException If other I/O error has occurred.
|
|
977 |
*/
|
|
978 |
public long readLong() throws IOException {
|
|
979 |
return bin.readLong();
|
|
980 |
}
|
|
981 |
|
|
982 |
/**
|
|
983 |
* Reads a 32 bit float.
|
|
984 |
*
|
|
985 |
* @return the 32 bit float read.
|
|
986 |
* @throws EOFException If end of file is reached.
|
|
987 |
* @throws IOException If other I/O error has occurred.
|
|
988 |
*/
|
|
989 |
public float readFloat() throws IOException {
|
|
990 |
return bin.readFloat();
|
|
991 |
}
|
|
992 |
|
|
993 |
/**
|
|
994 |
* Reads a 64 bit double.
|
|
995 |
*
|
|
996 |
* @return the 64 bit double read.
|
|
997 |
* @throws EOFException If end of file is reached.
|
|
998 |
* @throws IOException If other I/O error has occurred.
|
|
999 |
*/
|
|
1000 |
public double readDouble() throws IOException {
|
|
1001 |
return bin.readDouble();
|
|
1002 |
}
|
|
1003 |
|
|
1004 |
/**
|
|
1005 |
* Reads bytes, blocking until all bytes are read.
|
|
1006 |
*
|
|
1007 |
* @param buf the buffer into which the data is read
|
|
1008 |
* @throws EOFException If end of file is reached.
|
|
1009 |
* @throws IOException If other I/O error has occurred.
|
|
1010 |
*/
|
|
1011 |
public void readFully(byte[] buf) throws IOException {
|
|
1012 |
bin.readFully(buf, 0, buf.length, false);
|
|
1013 |
}
|
|
1014 |
|
|
1015 |
/**
|
|
1016 |
* Reads bytes, blocking until all bytes are read.
|
|
1017 |
*
|
|
1018 |
* @param buf the buffer into which the data is read
|
|
1019 |
* @param off the start offset of the data
|
|
1020 |
* @param len the maximum number of bytes to read
|
|
1021 |
* @throws EOFException If end of file is reached.
|
|
1022 |
* @throws IOException If other I/O error has occurred.
|
|
1023 |
*/
|
|
1024 |
public void readFully(byte[] buf, int off, int len) throws IOException {
|
|
1025 |
int endoff = off + len;
|
|
1026 |
if (off < 0 || len < 0 || endoff > buf.length || endoff < 0) {
|
|
1027 |
throw new IndexOutOfBoundsException();
|
|
1028 |
}
|
|
1029 |
bin.readFully(buf, off, len, false);
|
|
1030 |
}
|
|
1031 |
|
|
1032 |
/**
|
|
1033 |
* Skips bytes.
|
|
1034 |
*
|
|
1035 |
* @param len the number of bytes to be skipped
|
|
1036 |
* @return the actual number of bytes skipped.
|
|
1037 |
* @throws IOException If an I/O error has occurred.
|
|
1038 |
*/
|
|
1039 |
public int skipBytes(int len) throws IOException {
|
|
1040 |
return bin.skipBytes(len);
|
|
1041 |
}
|
|
1042 |
|
|
1043 |
/**
|
|
1044 |
* Reads in a line that has been terminated by a \n, \r, \r\n or EOF.
|
|
1045 |
*
|
|
1046 |
* @return a String copy of the line.
|
|
1047 |
* @throws IOException if there are I/O errors while reading from the
|
|
1048 |
* underlying <code>InputStream</code>
|
|
1049 |
* @deprecated This method does not properly convert bytes to characters.
|
|
1050 |
* see DataInputStream for the details and alternatives.
|
|
1051 |
*/
|
|
1052 |
@Deprecated
|
|
1053 |
public String readLine() throws IOException {
|
|
1054 |
return bin.readLine();
|
|
1055 |
}
|
|
1056 |
|
|
1057 |
/**
|
|
1058 |
* Reads a String in
|
|
1059 |
* <a href="DataInput.html#modified-utf-8">modified UTF-8</a>
|
|
1060 |
* format.
|
|
1061 |
*
|
|
1062 |
* @return the String.
|
|
1063 |
* @throws IOException if there are I/O errors while reading from the
|
|
1064 |
* underlying <code>InputStream</code>
|
|
1065 |
* @throws UTFDataFormatException if read bytes do not represent a valid
|
|
1066 |
* modified UTF-8 encoding of a string
|
|
1067 |
*/
|
|
1068 |
public String readUTF() throws IOException {
|
|
1069 |
return bin.readUTF();
|
|
1070 |
}
|
|
1071 |
|
|
1072 |
/**
|
|
1073 |
* Provide access to the persistent fields read from the input stream.
|
|
1074 |
*/
|
|
1075 |
public static abstract class GetField {
|
|
1076 |
|
|
1077 |
/**
|
|
1078 |
* Get the ObjectStreamClass that describes the fields in the stream.
|
|
1079 |
*
|
|
1080 |
* @return the descriptor class that describes the serializable fields
|
|
1081 |
*/
|
|
1082 |
public abstract ObjectStreamClass getObjectStreamClass();
|
|
1083 |
|
|
1084 |
/**
|
|
1085 |
* Return true if the named field is defaulted and has no value in this
|
|
1086 |
* stream.
|
|
1087 |
*
|
|
1088 |
* @param name the name of the field
|
|
1089 |
* @return true, if and only if the named field is defaulted
|
|
1090 |
* @throws IOException if there are I/O errors while reading from
|
|
1091 |
* the underlying <code>InputStream</code>
|
|
1092 |
* @throws IllegalArgumentException if <code>name</code> does not
|
|
1093 |
* correspond to a serializable field
|
|
1094 |
*/
|
|
1095 |
public abstract boolean defaulted(String name) throws IOException;
|
|
1096 |
|
|
1097 |
/**
|
|
1098 |
* Get the value of the named boolean field from the persistent field.
|
|
1099 |
*
|
|
1100 |
* @param name the name of the field
|
|
1101 |
* @param val the default value to use if <code>name</code> does not
|
|
1102 |
* have a value
|
|
1103 |
* @return the value of the named <code>boolean</code> field
|
|
1104 |
* @throws IOException if there are I/O errors while reading from the
|
|
1105 |
* underlying <code>InputStream</code>
|
|
1106 |
* @throws IllegalArgumentException if type of <code>name</code> is
|
|
1107 |
* not serializable or if the field type is incorrect
|
|
1108 |
*/
|
|
1109 |
public abstract boolean get(String name, boolean val)
|
|
1110 |
throws IOException;
|
|
1111 |
|
|
1112 |
/**
|
|
1113 |
* Get the value of the named byte field from the persistent field.
|
|
1114 |
*
|
|
1115 |
* @param name the name of the field
|
|
1116 |
* @param val the default value to use if <code>name</code> does not
|
|
1117 |
* have a value
|
|
1118 |
* @return the value of the named <code>byte</code> field
|
|
1119 |
* @throws IOException if there are I/O errors while reading from the
|
|
1120 |
* underlying <code>InputStream</code>
|
|
1121 |
* @throws IllegalArgumentException if type of <code>name</code> is
|
|
1122 |
* not serializable or if the field type is incorrect
|
|
1123 |
*/
|
|
1124 |
public abstract byte get(String name, byte val) throws IOException;
|
|
1125 |
|
|
1126 |
/**
|
|
1127 |
* Get the value of the named char field from the persistent field.
|
|
1128 |
*
|
|
1129 |
* @param name the name of the field
|
|
1130 |
* @param val the default value to use if <code>name</code> does not
|
|
1131 |
* have a value
|
|
1132 |
* @return the value of the named <code>char</code> field
|
|
1133 |
* @throws IOException if there are I/O errors while reading from the
|
|
1134 |
* underlying <code>InputStream</code>
|
|
1135 |
* @throws IllegalArgumentException if type of <code>name</code> is
|
|
1136 |
* not serializable or if the field type is incorrect
|
|
1137 |
*/
|
|
1138 |
public abstract char get(String name, char val) throws IOException;
|
|
1139 |
|
|
1140 |
/**
|
|
1141 |
* Get the value of the named short field from the persistent field.
|
|
1142 |
*
|
|
1143 |
* @param name the name of the field
|
|
1144 |
* @param val the default value to use if <code>name</code> does not
|
|
1145 |
* have a value
|
|
1146 |
* @return the value of the named <code>short</code> field
|
|
1147 |
* @throws IOException if there are I/O errors while reading from the
|
|
1148 |
* underlying <code>InputStream</code>
|
|
1149 |
* @throws IllegalArgumentException if type of <code>name</code> is
|
|
1150 |
* not serializable or if the field type is incorrect
|
|
1151 |
*/
|
|
1152 |
public abstract short get(String name, short val) throws IOException;
|
|
1153 |
|
|
1154 |
/**
|
|
1155 |
* Get the value of the named int field from the persistent field.
|
|
1156 |
*
|
|
1157 |
* @param name the name of the field
|
|
1158 |
* @param val the default value to use if <code>name</code> does not
|
|
1159 |
* have a value
|
|
1160 |
* @return the value of the named <code>int</code> field
|
|
1161 |
* @throws IOException if there are I/O errors while reading from the
|
|
1162 |
* underlying <code>InputStream</code>
|
|
1163 |
* @throws IllegalArgumentException if type of <code>name</code> is
|
|
1164 |
* not serializable or if the field type is incorrect
|
|
1165 |
*/
|
|
1166 |
public abstract int get(String name, int val) throws IOException;
|
|
1167 |
|
|
1168 |
/**
|
|
1169 |
* Get the value of the named long field from the persistent field.
|
|
1170 |
*
|
|
1171 |
* @param name the name of the field
|
|
1172 |
* @param val the default value to use if <code>name</code> does not
|
|
1173 |
* have a value
|
|
1174 |
* @return the value of the named <code>long</code> field
|
|
1175 |
* @throws IOException if there are I/O errors while reading from the
|
|
1176 |
* underlying <code>InputStream</code>
|
|
1177 |
* @throws IllegalArgumentException if type of <code>name</code> is
|
|
1178 |
* not serializable or if the field type is incorrect
|
|
1179 |
*/
|
|
1180 |
public abstract long get(String name, long val) throws IOException;
|
|
1181 |
|
|
1182 |
/**
|
|
1183 |
* Get the value of the named float field from the persistent field.
|
|
1184 |
*
|
|
1185 |
* @param name the name of the field
|
|
1186 |
* @param val the default value to use if <code>name</code> does not
|
|
1187 |
* have a value
|
|
1188 |
* @return the value of the named <code>float</code> field
|
|
1189 |
* @throws IOException if there are I/O errors while reading from the
|
|
1190 |
* underlying <code>InputStream</code>
|
|
1191 |
* @throws IllegalArgumentException if type of <code>name</code> is
|
|
1192 |
* not serializable or if the field type is incorrect
|
|
1193 |
*/
|
|
1194 |
public abstract float get(String name, float val) throws IOException;
|
|
1195 |
|
|
1196 |
/**
|
|
1197 |
* Get the value of the named double field from the persistent field.
|
|
1198 |
*
|
|
1199 |
* @param name the name of the field
|
|
1200 |
* @param val the default value to use if <code>name</code> does not
|
|
1201 |
* have a value
|
|
1202 |
* @return the value of the named <code>double</code> field
|
|
1203 |
* @throws IOException if there are I/O errors while reading from the
|
|
1204 |
* underlying <code>InputStream</code>
|
|
1205 |
* @throws IllegalArgumentException if type of <code>name</code> is
|
|
1206 |
* not serializable or if the field type is incorrect
|
|
1207 |
*/
|
|
1208 |
public abstract double get(String name, double val) throws IOException;
|
|
1209 |
|
|
1210 |
/**
|
|
1211 |
* Get the value of the named Object field from the persistent field.
|
|
1212 |
*
|
|
1213 |
* @param name the name of the field
|
|
1214 |
* @param val the default value to use if <code>name</code> does not
|
|
1215 |
* have a value
|
|
1216 |
* @return the value of the named <code>Object</code> field
|
|
1217 |
* @throws IOException if there are I/O errors while reading from the
|
|
1218 |
* underlying <code>InputStream</code>
|
|
1219 |
* @throws IllegalArgumentException if type of <code>name</code> is
|
|
1220 |
* not serializable or if the field type is incorrect
|
|
1221 |
*/
|
|
1222 |
public abstract Object get(String name, Object val) throws IOException;
|
|
1223 |
}
|
|
1224 |
|
|
1225 |
/**
|
|
1226 |
* Verifies that this (possibly subclass) instance can be constructed
|
|
1227 |
* without violating security constraints: the subclass must not override
|
|
1228 |
* security-sensitive non-final methods, or else the
|
|
1229 |
* "enableSubclassImplementation" SerializablePermission is checked.
|
|
1230 |
*/
|
|
1231 |
private void verifySubclass() {
|
|
1232 |
Class cl = getClass();
|
|
1233 |
if (cl == ObjectInputStream.class) {
|
|
1234 |
return;
|
|
1235 |
}
|
|
1236 |
SecurityManager sm = System.getSecurityManager();
|
|
1237 |
if (sm == null) {
|
|
1238 |
return;
|
|
1239 |
}
|
|
1240 |
processQueue(Caches.subclassAuditsQueue, Caches.subclassAudits);
|
|
1241 |
WeakClassKey key = new WeakClassKey(cl, Caches.subclassAuditsQueue);
|
|
1242 |
Boolean result = Caches.subclassAudits.get(key);
|
|
1243 |
if (result == null) {
|
|
1244 |
result = Boolean.valueOf(auditSubclass(cl));
|
|
1245 |
Caches.subclassAudits.putIfAbsent(key, result);
|
|
1246 |
}
|
|
1247 |
if (result.booleanValue()) {
|
|
1248 |
return;
|
|
1249 |
}
|
|
1250 |
sm.checkPermission(SUBCLASS_IMPLEMENTATION_PERMISSION);
|
|
1251 |
}
|
|
1252 |
|
|
1253 |
/**
|
|
1254 |
* Performs reflective checks on given subclass to verify that it doesn't
|
|
1255 |
* override security-sensitive non-final methods. Returns true if subclass
|
|
1256 |
* is "safe", false otherwise.
|
|
1257 |
*/
|
51
|
1258 |
private static boolean auditSubclass(final Class<?> subcl) {
|
2
|
1259 |
Boolean result = AccessController.doPrivileged(
|
|
1260 |
new PrivilegedAction<Boolean>() {
|
|
1261 |
public Boolean run() {
|
51
|
1262 |
for (Class<?> cl = subcl;
|
2
|
1263 |
cl != ObjectInputStream.class;
|
|
1264 |
cl = cl.getSuperclass())
|
|
1265 |
{
|
|
1266 |
try {
|
|
1267 |
cl.getDeclaredMethod(
|
|
1268 |
"readUnshared", (Class[]) null);
|
|
1269 |
return Boolean.FALSE;
|
|
1270 |
} catch (NoSuchMethodException ex) {
|
|
1271 |
}
|
|
1272 |
try {
|
|
1273 |
cl.getDeclaredMethod("readFields", (Class[]) null);
|
|
1274 |
return Boolean.FALSE;
|
|
1275 |
} catch (NoSuchMethodException ex) {
|
|
1276 |
}
|
|
1277 |
}
|
|
1278 |
return Boolean.TRUE;
|
|
1279 |
}
|
|
1280 |
}
|
|
1281 |
);
|
|
1282 |
return result.booleanValue();
|
|
1283 |
}
|
|
1284 |
|
|
1285 |
/**
|
|
1286 |
* Clears internal data structures.
|
|
1287 |
*/
|
|
1288 |
private void clear() {
|
|
1289 |
handles.clear();
|
|
1290 |
vlist.clear();
|
|
1291 |
}
|
|
1292 |
|
|
1293 |
/**
|
|
1294 |
* Underlying readObject implementation.
|
|
1295 |
*/
|
|
1296 |
private Object readObject0(boolean unshared) throws IOException {
|
|
1297 |
boolean oldMode = bin.getBlockDataMode();
|
|
1298 |
if (oldMode) {
|
|
1299 |
int remain = bin.currentBlockRemaining();
|
|
1300 |
if (remain > 0) {
|
|
1301 |
throw new OptionalDataException(remain);
|
|
1302 |
} else if (defaultDataEnd) {
|
|
1303 |
/*
|
|
1304 |
* Fix for 4360508: stream is currently at the end of a field
|
|
1305 |
* value block written via default serialization; since there
|
|
1306 |
* is no terminating TC_ENDBLOCKDATA tag, simulate
|
|
1307 |
* end-of-custom-data behavior explicitly.
|
|
1308 |
*/
|
|
1309 |
throw new OptionalDataException(true);
|
|
1310 |
}
|
|
1311 |
bin.setBlockDataMode(false);
|
|
1312 |
}
|
|
1313 |
|
|
1314 |
byte tc;
|
|
1315 |
while ((tc = bin.peekByte()) == TC_RESET) {
|
|
1316 |
bin.readByte();
|
|
1317 |
handleReset();
|
|
1318 |
}
|
|
1319 |
|
|
1320 |
depth++;
|
|
1321 |
try {
|
|
1322 |
switch (tc) {
|
|
1323 |
case TC_NULL:
|
|
1324 |
return readNull();
|
|
1325 |
|
|
1326 |
case TC_REFERENCE:
|
|
1327 |
return readHandle(unshared);
|
|
1328 |
|
|
1329 |
case TC_CLASS:
|
|
1330 |
return readClass(unshared);
|
|
1331 |
|
|
1332 |
case TC_CLASSDESC:
|
|
1333 |
case TC_PROXYCLASSDESC:
|
|
1334 |
return readClassDesc(unshared);
|
|
1335 |
|
|
1336 |
case TC_STRING:
|
|
1337 |
case TC_LONGSTRING:
|
|
1338 |
return checkResolve(readString(unshared));
|
|
1339 |
|
|
1340 |
case TC_ARRAY:
|
|
1341 |
return checkResolve(readArray(unshared));
|
|
1342 |
|
|
1343 |
case TC_ENUM:
|
|
1344 |
return checkResolve(readEnum(unshared));
|
|
1345 |
|
|
1346 |
case TC_OBJECT:
|
|
1347 |
return checkResolve(readOrdinaryObject(unshared));
|
|
1348 |
|
|
1349 |
case TC_EXCEPTION:
|
|
1350 |
IOException ex = readFatalException();
|
|
1351 |
throw new WriteAbortedException("writing aborted", ex);
|
|
1352 |
|
|
1353 |
case TC_BLOCKDATA:
|
|
1354 |
case TC_BLOCKDATALONG:
|
|
1355 |
if (oldMode) {
|
|
1356 |
bin.setBlockDataMode(true);
|
|
1357 |
bin.peek(); // force header read
|
|
1358 |
throw new OptionalDataException(
|
|
1359 |
bin.currentBlockRemaining());
|
|
1360 |
} else {
|
|
1361 |
throw new StreamCorruptedException(
|
|
1362 |
"unexpected block data");
|
|
1363 |
}
|
|
1364 |
|
|
1365 |
case TC_ENDBLOCKDATA:
|
|
1366 |
if (oldMode) {
|
|
1367 |
throw new OptionalDataException(true);
|
|
1368 |
} else {
|
|
1369 |
throw new StreamCorruptedException(
|
|
1370 |
"unexpected end of block data");
|
|
1371 |
}
|
|
1372 |
|
|
1373 |
default:
|
|
1374 |
throw new StreamCorruptedException(
|
|
1375 |
String.format("invalid type code: %02X", tc));
|
|
1376 |
}
|
|
1377 |
} finally {
|
|
1378 |
depth--;
|
|
1379 |
bin.setBlockDataMode(oldMode);
|
|
1380 |
}
|
|
1381 |
}
|
|
1382 |
|
|
1383 |
/**
|
|
1384 |
* If resolveObject has been enabled and given object does not have an
|
|
1385 |
* exception associated with it, calls resolveObject to determine
|
|
1386 |
* replacement for object, and updates handle table accordingly. Returns
|
|
1387 |
* replacement object, or echoes provided object if no replacement
|
|
1388 |
* occurred. Expects that passHandle is set to given object's handle prior
|
|
1389 |
* to calling this method.
|
|
1390 |
*/
|
|
1391 |
private Object checkResolve(Object obj) throws IOException {
|
|
1392 |
if (!enableResolve || handles.lookupException(passHandle) != null) {
|
|
1393 |
return obj;
|
|
1394 |
}
|
|
1395 |
Object rep = resolveObject(obj);
|
|
1396 |
if (rep != obj) {
|
|
1397 |
handles.setObject(passHandle, rep);
|
|
1398 |
}
|
|
1399 |
return rep;
|
|
1400 |
}
|
|
1401 |
|
|
1402 |
/**
|
|
1403 |
* Reads string without allowing it to be replaced in stream. Called from
|
|
1404 |
* within ObjectStreamClass.read().
|
|
1405 |
*/
|
|
1406 |
String readTypeString() throws IOException {
|
|
1407 |
int oldHandle = passHandle;
|
|
1408 |
try {
|
|
1409 |
byte tc = bin.peekByte();
|
|
1410 |
switch (tc) {
|
|
1411 |
case TC_NULL:
|
|
1412 |
return (String) readNull();
|
|
1413 |
|
|
1414 |
case TC_REFERENCE:
|
|
1415 |
return (String) readHandle(false);
|
|
1416 |
|
|
1417 |
case TC_STRING:
|
|
1418 |
case TC_LONGSTRING:
|
|
1419 |
return readString(false);
|
|
1420 |
|
|
1421 |
default:
|
|
1422 |
throw new StreamCorruptedException(
|
|
1423 |
String.format("invalid type code: %02X", tc));
|
|
1424 |
}
|
|
1425 |
} finally {
|
|
1426 |
passHandle = oldHandle;
|
|
1427 |
}
|
|
1428 |
}
|
|
1429 |
|
|
1430 |
/**
|
|
1431 |
* Reads in null code, sets passHandle to NULL_HANDLE and returns null.
|
|
1432 |
*/
|
|
1433 |
private Object readNull() throws IOException {
|
|
1434 |
if (bin.readByte() != TC_NULL) {
|
|
1435 |
throw new InternalError();
|
|
1436 |
}
|
|
1437 |
passHandle = NULL_HANDLE;
|
|
1438 |
return null;
|
|
1439 |
}
|
|
1440 |
|
|
1441 |
/**
|
|
1442 |
* Reads in object handle, sets passHandle to the read handle, and returns
|
|
1443 |
* object associated with the handle.
|
|
1444 |
*/
|
|
1445 |
private Object readHandle(boolean unshared) throws IOException {
|
|
1446 |
if (bin.readByte() != TC_REFERENCE) {
|
|
1447 |
throw new InternalError();
|
|
1448 |
}
|
|
1449 |
passHandle = bin.readInt() - baseWireHandle;
|
|
1450 |
if (passHandle < 0 || passHandle >= handles.size()) {
|
|
1451 |
throw new StreamCorruptedException(
|
|
1452 |
String.format("invalid handle value: %08X", passHandle +
|
|
1453 |
baseWireHandle));
|
|
1454 |
}
|
|
1455 |
if (unshared) {
|
|
1456 |
// REMIND: what type of exception to throw here?
|
|
1457 |
throw new InvalidObjectException(
|
|
1458 |
"cannot read back reference as unshared");
|
|
1459 |
}
|
|
1460 |
|
|
1461 |
Object obj = handles.lookupObject(passHandle);
|
|
1462 |
if (obj == unsharedMarker) {
|
|
1463 |
// REMIND: what type of exception to throw here?
|
|
1464 |
throw new InvalidObjectException(
|
|
1465 |
"cannot read back reference to unshared object");
|
|
1466 |
}
|
|
1467 |
return obj;
|
|
1468 |
}
|
|
1469 |
|
|
1470 |
/**
|
|
1471 |
* Reads in and returns class object. Sets passHandle to class object's
|
|
1472 |
* assigned handle. Returns null if class is unresolvable (in which case a
|
|
1473 |
* ClassNotFoundException will be associated with the class' handle in the
|
|
1474 |
* handle table).
|
|
1475 |
*/
|
|
1476 |
private Class readClass(boolean unshared) throws IOException {
|
|
1477 |
if (bin.readByte() != TC_CLASS) {
|
|
1478 |
throw new InternalError();
|
|
1479 |
}
|
|
1480 |
ObjectStreamClass desc = readClassDesc(false);
|
|
1481 |
Class cl = desc.forClass();
|
|
1482 |
passHandle = handles.assign(unshared ? unsharedMarker : cl);
|
|
1483 |
|
|
1484 |
ClassNotFoundException resolveEx = desc.getResolveException();
|
|
1485 |
if (resolveEx != null) {
|
|
1486 |
handles.markException(passHandle, resolveEx);
|
|
1487 |
}
|
|
1488 |
|
|
1489 |
handles.finish(passHandle);
|
|
1490 |
return cl;
|
|
1491 |
}
|
|
1492 |
|
|
1493 |
/**
|
|
1494 |
* Reads in and returns (possibly null) class descriptor. Sets passHandle
|
|
1495 |
* to class descriptor's assigned handle. If class descriptor cannot be
|
|
1496 |
* resolved to a class in the local VM, a ClassNotFoundException is
|
|
1497 |
* associated with the class descriptor's handle.
|
|
1498 |
*/
|
|
1499 |
private ObjectStreamClass readClassDesc(boolean unshared)
|
|
1500 |
throws IOException
|
|
1501 |
{
|
|
1502 |
byte tc = bin.peekByte();
|
|
1503 |
switch (tc) {
|
|
1504 |
case TC_NULL:
|
|
1505 |
return (ObjectStreamClass) readNull();
|
|
1506 |
|
|
1507 |
case TC_REFERENCE:
|
|
1508 |
return (ObjectStreamClass) readHandle(unshared);
|
|
1509 |
|
|
1510 |
case TC_PROXYCLASSDESC:
|
|
1511 |
return readProxyDesc(unshared);
|
|
1512 |
|
|
1513 |
case TC_CLASSDESC:
|
|
1514 |
return readNonProxyDesc(unshared);
|
|
1515 |
|
|
1516 |
default:
|
|
1517 |
throw new StreamCorruptedException(
|
|
1518 |
String.format("invalid type code: %02X", tc));
|
|
1519 |
}
|
|
1520 |
}
|
|
1521 |
|
|
1522 |
/**
|
|
1523 |
* Reads in and returns class descriptor for a dynamic proxy class. Sets
|
|
1524 |
* passHandle to proxy class descriptor's assigned handle. If proxy class
|
|
1525 |
* descriptor cannot be resolved to a class in the local VM, a
|
|
1526 |
* ClassNotFoundException is associated with the descriptor's handle.
|
|
1527 |
*/
|
|
1528 |
private ObjectStreamClass readProxyDesc(boolean unshared)
|
|
1529 |
throws IOException
|
|
1530 |
{
|
|
1531 |
if (bin.readByte() != TC_PROXYCLASSDESC) {
|
|
1532 |
throw new InternalError();
|
|
1533 |
}
|
|
1534 |
|
|
1535 |
ObjectStreamClass desc = new ObjectStreamClass();
|
|
1536 |
int descHandle = handles.assign(unshared ? unsharedMarker : desc);
|
|
1537 |
passHandle = NULL_HANDLE;
|
|
1538 |
|
|
1539 |
int numIfaces = bin.readInt();
|
|
1540 |
String[] ifaces = new String[numIfaces];
|
|
1541 |
for (int i = 0; i < numIfaces; i++) {
|
|
1542 |
ifaces[i] = bin.readUTF();
|
|
1543 |
}
|
|
1544 |
|
|
1545 |
Class cl = null;
|
|
1546 |
ClassNotFoundException resolveEx = null;
|
|
1547 |
bin.setBlockDataMode(true);
|
|
1548 |
try {
|
|
1549 |
if ((cl = resolveProxyClass(ifaces)) == null) {
|
|
1550 |
resolveEx = new ClassNotFoundException("null class");
|
|
1551 |
}
|
|
1552 |
} catch (ClassNotFoundException ex) {
|
|
1553 |
resolveEx = ex;
|
|
1554 |
}
|
|
1555 |
skipCustomData();
|
|
1556 |
|
|
1557 |
desc.initProxy(cl, resolveEx, readClassDesc(false));
|
|
1558 |
|
|
1559 |
handles.finish(descHandle);
|
|
1560 |
passHandle = descHandle;
|
|
1561 |
return desc;
|
|
1562 |
}
|
|
1563 |
|
|
1564 |
/**
|
|
1565 |
* Reads in and returns class descriptor for a class that is not a dynamic
|
|
1566 |
* proxy class. Sets passHandle to class descriptor's assigned handle. If
|
|
1567 |
* class descriptor cannot be resolved to a class in the local VM, a
|
|
1568 |
* ClassNotFoundException is associated with the descriptor's handle.
|
|
1569 |
*/
|
|
1570 |
private ObjectStreamClass readNonProxyDesc(boolean unshared)
|
|
1571 |
throws IOException
|
|
1572 |
{
|
|
1573 |
if (bin.readByte() != TC_CLASSDESC) {
|
|
1574 |
throw new InternalError();
|
|
1575 |
}
|
|
1576 |
|
|
1577 |
ObjectStreamClass desc = new ObjectStreamClass();
|
|
1578 |
int descHandle = handles.assign(unshared ? unsharedMarker : desc);
|
|
1579 |
passHandle = NULL_HANDLE;
|
|
1580 |
|
|
1581 |
ObjectStreamClass readDesc = null;
|
|
1582 |
try {
|
|
1583 |
readDesc = readClassDescriptor();
|
|
1584 |
} catch (ClassNotFoundException ex) {
|
|
1585 |
throw (IOException) new InvalidClassException(
|
|
1586 |
"failed to read class descriptor").initCause(ex);
|
|
1587 |
}
|
|
1588 |
|
|
1589 |
Class cl = null;
|
|
1590 |
ClassNotFoundException resolveEx = null;
|
|
1591 |
bin.setBlockDataMode(true);
|
|
1592 |
try {
|
|
1593 |
if ((cl = resolveClass(readDesc)) == null) {
|
|
1594 |
resolveEx = new ClassNotFoundException("null class");
|
|
1595 |
}
|
|
1596 |
} catch (ClassNotFoundException ex) {
|
|
1597 |
resolveEx = ex;
|
|
1598 |
}
|
|
1599 |
skipCustomData();
|
|
1600 |
|
|
1601 |
desc.initNonProxy(readDesc, cl, resolveEx, readClassDesc(false));
|
|
1602 |
|
|
1603 |
handles.finish(descHandle);
|
|
1604 |
passHandle = descHandle;
|
|
1605 |
return desc;
|
|
1606 |
}
|
|
1607 |
|
|
1608 |
/**
|
|
1609 |
* Reads in and returns new string. Sets passHandle to new string's
|
|
1610 |
* assigned handle.
|
|
1611 |
*/
|
|
1612 |
private String readString(boolean unshared) throws IOException {
|
|
1613 |
String str;
|
|
1614 |
byte tc = bin.readByte();
|
|
1615 |
switch (tc) {
|
|
1616 |
case TC_STRING:
|
|
1617 |
str = bin.readUTF();
|
|
1618 |
break;
|
|
1619 |
|
|
1620 |
case TC_LONGSTRING:
|
|
1621 |
str = bin.readLongUTF();
|
|
1622 |
break;
|
|
1623 |
|
|
1624 |
default:
|
|
1625 |
throw new StreamCorruptedException(
|
|
1626 |
String.format("invalid type code: %02X", tc));
|
|
1627 |
}
|
|
1628 |
passHandle = handles.assign(unshared ? unsharedMarker : str);
|
|
1629 |
handles.finish(passHandle);
|
|
1630 |
return str;
|
|
1631 |
}
|
|
1632 |
|
|
1633 |
/**
|
|
1634 |
* Reads in and returns array object, or null if array class is
|
|
1635 |
* unresolvable. Sets passHandle to array's assigned handle.
|
|
1636 |
*/
|
|
1637 |
private Object readArray(boolean unshared) throws IOException {
|
|
1638 |
if (bin.readByte() != TC_ARRAY) {
|
|
1639 |
throw new InternalError();
|
|
1640 |
}
|
|
1641 |
|
|
1642 |
ObjectStreamClass desc = readClassDesc(false);
|
|
1643 |
int len = bin.readInt();
|
|
1644 |
|
|
1645 |
Object array = null;
|
|
1646 |
Class cl, ccl = null;
|
|
1647 |
if ((cl = desc.forClass()) != null) {
|
|
1648 |
ccl = cl.getComponentType();
|
|
1649 |
array = Array.newInstance(ccl, len);
|
|
1650 |
}
|
|
1651 |
|
|
1652 |
int arrayHandle = handles.assign(unshared ? unsharedMarker : array);
|
|
1653 |
ClassNotFoundException resolveEx = desc.getResolveException();
|
|
1654 |
if (resolveEx != null) {
|
|
1655 |
handles.markException(arrayHandle, resolveEx);
|
|
1656 |
}
|
|
1657 |
|
|
1658 |
if (ccl == null) {
|
|
1659 |
for (int i = 0; i < len; i++) {
|
|
1660 |
readObject0(false);
|
|
1661 |
}
|
|
1662 |
} else if (ccl.isPrimitive()) {
|
|
1663 |
if (ccl == Integer.TYPE) {
|
|
1664 |
bin.readInts((int[]) array, 0, len);
|
|
1665 |
} else if (ccl == Byte.TYPE) {
|
|
1666 |
bin.readFully((byte[]) array, 0, len, true);
|
|
1667 |
} else if (ccl == Long.TYPE) {
|
|
1668 |
bin.readLongs((long[]) array, 0, len);
|
|
1669 |
} else if (ccl == Float.TYPE) {
|
|
1670 |
bin.readFloats((float[]) array, 0, len);
|
|
1671 |
} else if (ccl == Double.TYPE) {
|
|
1672 |
bin.readDoubles((double[]) array, 0, len);
|
|
1673 |
} else if (ccl == Short.TYPE) {
|
|
1674 |
bin.readShorts((short[]) array, 0, len);
|
|
1675 |
} else if (ccl == Character.TYPE) {
|
|
1676 |
bin.readChars((char[]) array, 0, len);
|
|
1677 |
} else if (ccl == Boolean.TYPE) {
|
|
1678 |
bin.readBooleans((boolean[]) array, 0, len);
|
|
1679 |
} else {
|
|
1680 |
throw new InternalError();
|
|
1681 |
}
|
|
1682 |
} else {
|
|
1683 |
Object[] oa = (Object[]) array;
|
|
1684 |
for (int i = 0; i < len; i++) {
|
|
1685 |
oa[i] = readObject0(false);
|
|
1686 |
handles.markDependency(arrayHandle, passHandle);
|
|
1687 |
}
|
|
1688 |
}
|
|
1689 |
|
|
1690 |
handles.finish(arrayHandle);
|
|
1691 |
passHandle = arrayHandle;
|
|
1692 |
return array;
|
|
1693 |
}
|
|
1694 |
|
|
1695 |
/**
|
|
1696 |
* Reads in and returns enum constant, or null if enum type is
|
|
1697 |
* unresolvable. Sets passHandle to enum constant's assigned handle.
|
|
1698 |
*/
|
|
1699 |
private Enum readEnum(boolean unshared) throws IOException {
|
|
1700 |
if (bin.readByte() != TC_ENUM) {
|
|
1701 |
throw new InternalError();
|
|
1702 |
}
|
|
1703 |
|
|
1704 |
ObjectStreamClass desc = readClassDesc(false);
|
|
1705 |
if (!desc.isEnum()) {
|
|
1706 |
throw new InvalidClassException("non-enum class: " + desc);
|
|
1707 |
}
|
|
1708 |
|
|
1709 |
int enumHandle = handles.assign(unshared ? unsharedMarker : null);
|
|
1710 |
ClassNotFoundException resolveEx = desc.getResolveException();
|
|
1711 |
if (resolveEx != null) {
|
|
1712 |
handles.markException(enumHandle, resolveEx);
|
|
1713 |
}
|
|
1714 |
|
|
1715 |
String name = readString(false);
|
|
1716 |
Enum en = null;
|
|
1717 |
Class cl = desc.forClass();
|
|
1718 |
if (cl != null) {
|
|
1719 |
try {
|
|
1720 |
en = Enum.valueOf(cl, name);
|
|
1721 |
} catch (IllegalArgumentException ex) {
|
|
1722 |
throw (IOException) new InvalidObjectException(
|
|
1723 |
"enum constant " + name + " does not exist in " +
|
|
1724 |
cl).initCause(ex);
|
|
1725 |
}
|
|
1726 |
if (!unshared) {
|
|
1727 |
handles.setObject(enumHandle, en);
|
|
1728 |
}
|
|
1729 |
}
|
|
1730 |
|
|
1731 |
handles.finish(enumHandle);
|
|
1732 |
passHandle = enumHandle;
|
|
1733 |
return en;
|
|
1734 |
}
|
|
1735 |
|
|
1736 |
/**
|
|
1737 |
* Reads and returns "ordinary" (i.e., not a String, Class,
|
|
1738 |
* ObjectStreamClass, array, or enum constant) object, or null if object's
|
|
1739 |
* class is unresolvable (in which case a ClassNotFoundException will be
|
|
1740 |
* associated with object's handle). Sets passHandle to object's assigned
|
|
1741 |
* handle.
|
|
1742 |
*/
|
|
1743 |
private Object readOrdinaryObject(boolean unshared)
|
|
1744 |
throws IOException
|
|
1745 |
{
|
|
1746 |
if (bin.readByte() != TC_OBJECT) {
|
|
1747 |
throw new InternalError();
|
|
1748 |
}
|
|
1749 |
|
|
1750 |
ObjectStreamClass desc = readClassDesc(false);
|
|
1751 |
desc.checkDeserialize();
|
|
1752 |
|
|
1753 |
Object obj;
|
|
1754 |
try {
|
|
1755 |
obj = desc.isInstantiable() ? desc.newInstance() : null;
|
|
1756 |
} catch (Exception ex) {
|
|
1757 |
throw (IOException) new InvalidClassException(
|
|
1758 |
desc.forClass().getName(),
|
|
1759 |
"unable to create instance").initCause(ex);
|
|
1760 |
}
|
|
1761 |
|
|
1762 |
passHandle = handles.assign(unshared ? unsharedMarker : obj);
|
|
1763 |
ClassNotFoundException resolveEx = desc.getResolveException();
|
|
1764 |
if (resolveEx != null) {
|
|
1765 |
handles.markException(passHandle, resolveEx);
|
|
1766 |
}
|
|
1767 |
|
|
1768 |
if (desc.isExternalizable()) {
|
|
1769 |
readExternalData((Externalizable) obj, desc);
|
|
1770 |
} else {
|
|
1771 |
readSerialData(obj, desc);
|
|
1772 |
}
|
|
1773 |
|
|
1774 |
handles.finish(passHandle);
|
|
1775 |
|
|
1776 |
if (obj != null &&
|
|
1777 |
handles.lookupException(passHandle) == null &&
|
|
1778 |
desc.hasReadResolveMethod())
|
|
1779 |
{
|
|
1780 |
Object rep = desc.invokeReadResolve(obj);
|
|
1781 |
if (unshared && rep.getClass().isArray()) {
|
|
1782 |
rep = cloneArray(rep);
|
|
1783 |
}
|
|
1784 |
if (rep != obj) {
|
|
1785 |
handles.setObject(passHandle, obj = rep);
|
|
1786 |
}
|
|
1787 |
}
|
|
1788 |
|
|
1789 |
return obj;
|
|
1790 |
}
|
|
1791 |
|
|
1792 |
/**
|
|
1793 |
* If obj is non-null, reads externalizable data by invoking readExternal()
|
|
1794 |
* method of obj; otherwise, attempts to skip over externalizable data.
|
|
1795 |
* Expects that passHandle is set to obj's handle before this method is
|
|
1796 |
* called.
|
|
1797 |
*/
|
|
1798 |
private void readExternalData(Externalizable obj, ObjectStreamClass desc)
|
|
1799 |
throws IOException
|
|
1800 |
{
|
|
1801 |
CallbackContext oldContext = curContext;
|
|
1802 |
curContext = null;
|
|
1803 |
try {
|
|
1804 |
boolean blocked = desc.hasBlockExternalData();
|
|
1805 |
if (blocked) {
|
|
1806 |
bin.setBlockDataMode(true);
|
|
1807 |
}
|
|
1808 |
if (obj != null) {
|
|
1809 |
try {
|
|
1810 |
obj.readExternal(this);
|
|
1811 |
} catch (ClassNotFoundException ex) {
|
|
1812 |
/*
|
|
1813 |
* In most cases, the handle table has already propagated
|
|
1814 |
* a CNFException to passHandle at this point; this mark
|
|
1815 |
* call is included to address cases where the readExternal
|
|
1816 |
* method has cons'ed and thrown a new CNFException of its
|
|
1817 |
* own.
|
|
1818 |
*/
|
|
1819 |
handles.markException(passHandle, ex);
|
|
1820 |
}
|
|
1821 |
}
|
|
1822 |
if (blocked) {
|
|
1823 |
skipCustomData();
|
|
1824 |
}
|
|
1825 |
} finally {
|
|
1826 |
curContext = oldContext;
|
|
1827 |
}
|
|
1828 |
/*
|
|
1829 |
* At this point, if the externalizable data was not written in
|
|
1830 |
* block-data form and either the externalizable class doesn't exist
|
|
1831 |
* locally (i.e., obj == null) or readExternal() just threw a
|
|
1832 |
* CNFException, then the stream is probably in an inconsistent state,
|
|
1833 |
* since some (or all) of the externalizable data may not have been
|
|
1834 |
* consumed. Since there's no "correct" action to take in this case,
|
|
1835 |
* we mimic the behavior of past serialization implementations and
|
|
1836 |
* blindly hope that the stream is in sync; if it isn't and additional
|
|
1837 |
* externalizable data remains in the stream, a subsequent read will
|
|
1838 |
* most likely throw a StreamCorruptedException.
|
|
1839 |
*/
|
|
1840 |
}
|
|
1841 |
|
|
1842 |
/**
|
|
1843 |
* Reads (or attempts to skip, if obj is null or is tagged with a
|
|
1844 |
* ClassNotFoundException) instance data for each serializable class of
|
|
1845 |
* object in stream, from superclass to subclass. Expects that passHandle
|
|
1846 |
* is set to obj's handle before this method is called.
|
|
1847 |
*/
|
|
1848 |
private void readSerialData(Object obj, ObjectStreamClass desc)
|
|
1849 |
throws IOException
|
|
1850 |
{
|
|
1851 |
ObjectStreamClass.ClassDataSlot[] slots = desc.getClassDataLayout();
|
|
1852 |
for (int i = 0; i < slots.length; i++) {
|
|
1853 |
ObjectStreamClass slotDesc = slots[i].desc;
|
|
1854 |
|
|
1855 |
if (slots[i].hasData) {
|
|
1856 |
if (obj != null &&
|
|
1857 |
slotDesc.hasReadObjectMethod() &&
|
|
1858 |
handles.lookupException(passHandle) == null)
|
|
1859 |
{
|
|
1860 |
CallbackContext oldContext = curContext;
|
|
1861 |
|
|
1862 |
try {
|
|
1863 |
curContext = new CallbackContext(obj, slotDesc);
|
|
1864 |
|
|
1865 |
bin.setBlockDataMode(true);
|
|
1866 |
slotDesc.invokeReadObject(obj, this);
|
|
1867 |
} catch (ClassNotFoundException ex) {
|
|
1868 |
/*
|
|
1869 |
* In most cases, the handle table has already
|
|
1870 |
* propagated a CNFException to passHandle at this
|
|
1871 |
* point; this mark call is included to address cases
|
|
1872 |
* where the custom readObject method has cons'ed and
|
|
1873 |
* thrown a new CNFException of its own.
|
|
1874 |
*/
|
|
1875 |
handles.markException(passHandle, ex);
|
|
1876 |
} finally {
|
|
1877 |
curContext.setUsed();
|
|
1878 |
curContext = oldContext;
|
|
1879 |
}
|
|
1880 |
|
|
1881 |
/*
|
|
1882 |
* defaultDataEnd may have been set indirectly by custom
|
|
1883 |
* readObject() method when calling defaultReadObject() or
|
|
1884 |
* readFields(); clear it to restore normal read behavior.
|
|
1885 |
*/
|
|
1886 |
defaultDataEnd = false;
|
|
1887 |
} else {
|
|
1888 |
defaultReadFields(obj, slotDesc);
|
|
1889 |
}
|
|
1890 |
if (slotDesc.hasWriteObjectData()) {
|
|
1891 |
skipCustomData();
|
|
1892 |
} else {
|
|
1893 |
bin.setBlockDataMode(false);
|
|
1894 |
}
|
|
1895 |
} else {
|
|
1896 |
if (obj != null &&
|
|
1897 |
slotDesc.hasReadObjectNoDataMethod() &&
|
|
1898 |
handles.lookupException(passHandle) == null)
|
|
1899 |
{
|
|
1900 |
slotDesc.invokeReadObjectNoData(obj);
|
|
1901 |
}
|
|
1902 |
}
|
|
1903 |
}
|
|
1904 |
}
|
|
1905 |
|
|
1906 |
/**
|
|
1907 |
* Skips over all block data and objects until TC_ENDBLOCKDATA is
|
|
1908 |
* encountered.
|
|
1909 |
*/
|
|
1910 |
private void skipCustomData() throws IOException {
|
|
1911 |
int oldHandle = passHandle;
|
|
1912 |
for (;;) {
|
|
1913 |
if (bin.getBlockDataMode()) {
|
|
1914 |
bin.skipBlockData();
|
|
1915 |
bin.setBlockDataMode(false);
|
|
1916 |
}
|
|
1917 |
switch (bin.peekByte()) {
|
|
1918 |
case TC_BLOCKDATA:
|
|
1919 |
case TC_BLOCKDATALONG:
|
|
1920 |
bin.setBlockDataMode(true);
|
|
1921 |
break;
|
|
1922 |
|
|
1923 |
case TC_ENDBLOCKDATA:
|
|
1924 |
bin.readByte();
|
|
1925 |
passHandle = oldHandle;
|
|
1926 |
return;
|
|
1927 |
|
|
1928 |
default:
|
|
1929 |
readObject0(false);
|
|
1930 |
break;
|
|
1931 |
}
|
|
1932 |
}
|
|
1933 |
}
|
|
1934 |
|
|
1935 |
/**
|
|
1936 |
* Reads in values of serializable fields declared by given class
|
|
1937 |
* descriptor. If obj is non-null, sets field values in obj. Expects that
|
|
1938 |
* passHandle is set to obj's handle before this method is called.
|
|
1939 |
*/
|
|
1940 |
private void defaultReadFields(Object obj, ObjectStreamClass desc)
|
|
1941 |
throws IOException
|
|
1942 |
{
|
|
1943 |
// REMIND: is isInstance check necessary?
|
|
1944 |
Class cl = desc.forClass();
|
|
1945 |
if (cl != null && obj != null && !cl.isInstance(obj)) {
|
|
1946 |
throw new ClassCastException();
|
|
1947 |
}
|
|
1948 |
|
|
1949 |
int primDataSize = desc.getPrimDataSize();
|
|
1950 |
if (primVals == null || primVals.length < primDataSize) {
|
|
1951 |
primVals = new byte[primDataSize];
|
|
1952 |
}
|
|
1953 |
bin.readFully(primVals, 0, primDataSize, false);
|
|
1954 |
if (obj != null) {
|
|
1955 |
desc.setPrimFieldValues(obj, primVals);
|
|
1956 |
}
|
|
1957 |
|
|
1958 |
int objHandle = passHandle;
|
|
1959 |
ObjectStreamField[] fields = desc.getFields(false);
|
|
1960 |
Object[] objVals = new Object[desc.getNumObjFields()];
|
|
1961 |
int numPrimFields = fields.length - objVals.length;
|
|
1962 |
for (int i = 0; i < objVals.length; i++) {
|
|
1963 |
ObjectStreamField f = fields[numPrimFields + i];
|
|
1964 |
objVals[i] = readObject0(f.isUnshared());
|
|
1965 |
if (f.getField() != null) {
|
|
1966 |
handles.markDependency(objHandle, passHandle);
|
|
1967 |
}
|
|
1968 |
}
|
|
1969 |
if (obj != null) {
|
|
1970 |
desc.setObjFieldValues(obj, objVals);
|
|
1971 |
}
|
|
1972 |
passHandle = objHandle;
|
|
1973 |
}
|
|
1974 |
|
|
1975 |
/**
|
|
1976 |
* Reads in and returns IOException that caused serialization to abort.
|
|
1977 |
* All stream state is discarded prior to reading in fatal exception. Sets
|
|
1978 |
* passHandle to fatal exception's handle.
|
|
1979 |
*/
|
|
1980 |
private IOException readFatalException() throws IOException {
|
|
1981 |
if (bin.readByte() != TC_EXCEPTION) {
|
|
1982 |
throw new InternalError();
|
|
1983 |
}
|
|
1984 |
clear();
|
|
1985 |
return (IOException) readObject0(false);
|
|
1986 |
}
|
|
1987 |
|
|
1988 |
/**
|
|
1989 |
* If recursion depth is 0, clears internal data structures; otherwise,
|
|
1990 |
* throws a StreamCorruptedException. This method is called when a
|
|
1991 |
* TC_RESET typecode is encountered.
|
|
1992 |
*/
|
|
1993 |
private void handleReset() throws StreamCorruptedException {
|
|
1994 |
if (depth > 0) {
|
|
1995 |
throw new StreamCorruptedException(
|
|
1996 |
"unexpected reset; recursion depth: " + depth);
|
|
1997 |
}
|
|
1998 |
clear();
|
|
1999 |
}
|
|
2000 |
|
|
2001 |
/**
|
|
2002 |
* Converts specified span of bytes into float values.
|
|
2003 |
*/
|
|
2004 |
// REMIND: remove once hotspot inlines Float.intBitsToFloat
|
|
2005 |
private static native void bytesToFloats(byte[] src, int srcpos,
|
|
2006 |
float[] dst, int dstpos,
|
|
2007 |
int nfloats);
|
|
2008 |
|
|
2009 |
/**
|
|
2010 |
* Converts specified span of bytes into double values.
|
|
2011 |
*/
|
|
2012 |
// REMIND: remove once hotspot inlines Double.longBitsToDouble
|
|
2013 |
private static native void bytesToDoubles(byte[] src, int srcpos,
|
|
2014 |
double[] dst, int dstpos,
|
|
2015 |
int ndoubles);
|
|
2016 |
|
|
2017 |
/**
|
|
2018 |
* Returns the first non-null class loader (not counting class loaders of
|
|
2019 |
* generated reflection implementation classes) up the execution stack, or
|
|
2020 |
* null if only code from the null class loader is on the stack. This
|
|
2021 |
* method is also called via reflection by the following RMI-IIOP class:
|
|
2022 |
*
|
|
2023 |
* com.sun.corba.se.internal.util.JDKClassLoader
|
|
2024 |
*
|
|
2025 |
* This method should not be removed or its signature changed without
|
|
2026 |
* corresponding modifications to the above class.
|
|
2027 |
*/
|
|
2028 |
// REMIND: change name to something more accurate?
|
|
2029 |
private static native ClassLoader latestUserDefinedLoader();
|
|
2030 |
|
|
2031 |
/**
|
|
2032 |
* Default GetField implementation.
|
|
2033 |
*/
|
|
2034 |
private class GetFieldImpl extends GetField {
|
|
2035 |
|
|
2036 |
/** class descriptor describing serializable fields */
|
|
2037 |
private final ObjectStreamClass desc;
|
|
2038 |
/** primitive field values */
|
|
2039 |
private final byte[] primVals;
|
|
2040 |
/** object field values */
|
|
2041 |
private final Object[] objVals;
|
|
2042 |
/** object field value handles */
|
|
2043 |
private final int[] objHandles;
|
|
2044 |
|
|
2045 |
/**
|
|
2046 |
* Creates GetFieldImpl object for reading fields defined in given
|
|
2047 |
* class descriptor.
|
|
2048 |
*/
|
|
2049 |
GetFieldImpl(ObjectStreamClass desc) {
|
|
2050 |
this.desc = desc;
|
|
2051 |
primVals = new byte[desc.getPrimDataSize()];
|
|
2052 |
objVals = new Object[desc.getNumObjFields()];
|
|
2053 |
objHandles = new int[objVals.length];
|
|
2054 |
}
|
|
2055 |
|
|
2056 |
public ObjectStreamClass getObjectStreamClass() {
|
|
2057 |
return desc;
|
|
2058 |
}
|
|
2059 |
|
|
2060 |
public boolean defaulted(String name) throws IOException {
|
|
2061 |
return (getFieldOffset(name, null) < 0);
|
|
2062 |
}
|
|
2063 |
|
|
2064 |
public boolean get(String name, boolean val) throws IOException {
|
|
2065 |
int off = getFieldOffset(name, Boolean.TYPE);
|
|
2066 |
return (off >= 0) ? Bits.getBoolean(primVals, off) : val;
|
|
2067 |
}
|
|
2068 |
|
|
2069 |
public byte get(String name, byte val) throws IOException {
|
|
2070 |
int off = getFieldOffset(name, Byte.TYPE);
|
|
2071 |
return (off >= 0) ? primVals[off] : val;
|
|
2072 |
}
|
|
2073 |
|
|
2074 |
public char get(String name, char val) throws IOException {
|
|
2075 |
int off = getFieldOffset(name, Character.TYPE);
|
|
2076 |
return (off >= 0) ? Bits.getChar(primVals, off) : val;
|
|
2077 |
}
|
|
2078 |
|
|
2079 |
public short get(String name, short val) throws IOException {
|
|
2080 |
int off = getFieldOffset(name, Short.TYPE);
|
|
2081 |
return (off >= 0) ? Bits.getShort(primVals, off) : val;
|
|
2082 |
}
|
|
2083 |
|
|
2084 |
public int get(String name, int val) throws IOException {
|
|
2085 |
int off = getFieldOffset(name, Integer.TYPE);
|
|
2086 |
return (off >= 0) ? Bits.getInt(primVals, off) : val;
|
|
2087 |
}
|
|
2088 |
|
|
2089 |
public float get(String name, float val) throws IOException {
|
|
2090 |
int off = getFieldOffset(name, Float.TYPE);
|
|
2091 |
return (off >= 0) ? Bits.getFloat(primVals, off) : val;
|
|
2092 |
}
|
|
2093 |
|
|
2094 |
public long get(String name, long val) throws IOException {
|
|
2095 |
int off = getFieldOffset(name, Long.TYPE);
|
|
2096 |
return (off >= 0) ? Bits.getLong(primVals, off) : val;
|
|
2097 |
}
|
|
2098 |
|
|
2099 |
public double get(String name, double val) throws IOException {
|
|
2100 |
int off = getFieldOffset(name, Double.TYPE);
|
|
2101 |
return (off >= 0) ? Bits.getDouble(primVals, off) : val;
|
|
2102 |
}
|
|
2103 |
|
|
2104 |
public Object get(String name, Object val) throws IOException {
|
|
2105 |
int off = getFieldOffset(name, Object.class);
|
|
2106 |
if (off >= 0) {
|
|
2107 |
int objHandle = objHandles[off];
|
|
2108 |
handles.markDependency(passHandle, objHandle);
|
|
2109 |
return (handles.lookupException(objHandle) == null) ?
|
|
2110 |
objVals[off] : null;
|
|
2111 |
} else {
|
|
2112 |
return val;
|
|
2113 |
}
|
|
2114 |
}
|
|
2115 |
|
|
2116 |
/**
|
|
2117 |
* Reads primitive and object field values from stream.
|
|
2118 |
*/
|
|
2119 |
void readFields() throws IOException {
|
|
2120 |
bin.readFully(primVals, 0, primVals.length, false);
|
|
2121 |
|
|
2122 |
int oldHandle = passHandle;
|
|
2123 |
ObjectStreamField[] fields = desc.getFields(false);
|
|
2124 |
int numPrimFields = fields.length - objVals.length;
|
|
2125 |
for (int i = 0; i < objVals.length; i++) {
|
|
2126 |
objVals[i] =
|
|
2127 |
readObject0(fields[numPrimFields + i].isUnshared());
|
|
2128 |
objHandles[i] = passHandle;
|
|
2129 |
}
|
|
2130 |
passHandle = oldHandle;
|
|
2131 |
}
|
|
2132 |
|
|
2133 |
/**
|
|
2134 |
* Returns offset of field with given name and type. A specified type
|
|
2135 |
* of null matches all types, Object.class matches all non-primitive
|
|
2136 |
* types, and any other non-null type matches assignable types only.
|
|
2137 |
* If no matching field is found in the (incoming) class
|
|
2138 |
* descriptor but a matching field is present in the associated local
|
|
2139 |
* class descriptor, returns -1. Throws IllegalArgumentException if
|
|
2140 |
* neither incoming nor local class descriptor contains a match.
|
|
2141 |
*/
|
|
2142 |
private int getFieldOffset(String name, Class type) {
|
|
2143 |
ObjectStreamField field = desc.getField(name, type);
|
|
2144 |
if (field != null) {
|
|
2145 |
return field.getOffset();
|
|
2146 |
} else if (desc.getLocalDesc().getField(name, type) != null) {
|
|
2147 |
return -1;
|
|
2148 |
} else {
|
|
2149 |
throw new IllegalArgumentException("no such field " + name +
|
|
2150 |
" with type " + type);
|
|
2151 |
}
|
|
2152 |
}
|
|
2153 |
}
|
|
2154 |
|
|
2155 |
/**
|
|
2156 |
* Prioritized list of callbacks to be performed once object graph has been
|
|
2157 |
* completely deserialized.
|
|
2158 |
*/
|
|
2159 |
private static class ValidationList {
|
|
2160 |
|
|
2161 |
private static class Callback {
|
|
2162 |
final ObjectInputValidation obj;
|
|
2163 |
final int priority;
|
|
2164 |
Callback next;
|
|
2165 |
final AccessControlContext acc;
|
|
2166 |
|
|
2167 |
Callback(ObjectInputValidation obj, int priority, Callback next,
|
|
2168 |
AccessControlContext acc)
|
|
2169 |
{
|
|
2170 |
this.obj = obj;
|
|
2171 |
this.priority = priority;
|
|
2172 |
this.next = next;
|
|
2173 |
this.acc = acc;
|
|
2174 |
}
|
|
2175 |
}
|
|
2176 |
|
|
2177 |
/** linked list of callbacks */
|
|
2178 |
private Callback list;
|
|
2179 |
|
|
2180 |
/**
|
|
2181 |
* Creates new (empty) ValidationList.
|
|
2182 |
*/
|
|
2183 |
ValidationList() {
|
|
2184 |
}
|
|
2185 |
|
|
2186 |
/**
|
|
2187 |
* Registers callback. Throws InvalidObjectException if callback
|
|
2188 |
* object is null.
|
|
2189 |
*/
|
|
2190 |
void register(ObjectInputValidation obj, int priority)
|
|
2191 |
throws InvalidObjectException
|
|
2192 |
{
|
|
2193 |
if (obj == null) {
|
|
2194 |
throw new InvalidObjectException("null callback");
|
|
2195 |
}
|
|
2196 |
|
|
2197 |
Callback prev = null, cur = list;
|
|
2198 |
while (cur != null && priority < cur.priority) {
|
|
2199 |
prev = cur;
|
|
2200 |
cur = cur.next;
|
|
2201 |
}
|
|
2202 |
AccessControlContext acc = AccessController.getContext();
|
|
2203 |
if (prev != null) {
|
|
2204 |
prev.next = new Callback(obj, priority, cur, acc);
|
|
2205 |
} else {
|
|
2206 |
list = new Callback(obj, priority, list, acc);
|
|
2207 |
}
|
|
2208 |
}
|
|
2209 |
|
|
2210 |
/**
|
|
2211 |
* Invokes all registered callbacks and clears the callback list.
|
|
2212 |
* Callbacks with higher priorities are called first; those with equal
|
|
2213 |
* priorities may be called in any order. If any of the callbacks
|
|
2214 |
* throws an InvalidObjectException, the callback process is terminated
|
|
2215 |
* and the exception propagated upwards.
|
|
2216 |
*/
|
|
2217 |
void doCallbacks() throws InvalidObjectException {
|
|
2218 |
try {
|
|
2219 |
while (list != null) {
|
|
2220 |
AccessController.doPrivileged(
|
51
|
2221 |
new PrivilegedExceptionAction<Void>()
|
2
|
2222 |
{
|
51
|
2223 |
public Void run() throws InvalidObjectException {
|
2
|
2224 |
list.obj.validateObject();
|
|
2225 |
return null;
|
|
2226 |
}
|
|
2227 |
}, list.acc);
|
|
2228 |
list = list.next;
|
|
2229 |
}
|
|
2230 |
} catch (PrivilegedActionException ex) {
|
|
2231 |
list = null;
|
|
2232 |
throw (InvalidObjectException) ex.getException();
|
|
2233 |
}
|
|
2234 |
}
|
|
2235 |
|
|
2236 |
/**
|
|
2237 |
* Resets the callback list to its initial (empty) state.
|
|
2238 |
*/
|
|
2239 |
public void clear() {
|
|
2240 |
list = null;
|
|
2241 |
}
|
|
2242 |
}
|
|
2243 |
|
|
2244 |
/**
|
|
2245 |
* Input stream supporting single-byte peek operations.
|
|
2246 |
*/
|
|
2247 |
private static class PeekInputStream extends InputStream {
|
|
2248 |
|
|
2249 |
/** underlying stream */
|
|
2250 |
private final InputStream in;
|
|
2251 |
/** peeked byte */
|
|
2252 |
private int peekb = -1;
|
|
2253 |
|
|
2254 |
/**
|
|
2255 |
* Creates new PeekInputStream on top of given underlying stream.
|
|
2256 |
*/
|
|
2257 |
PeekInputStream(InputStream in) {
|
|
2258 |
this.in = in;
|
|
2259 |
}
|
|
2260 |
|
|
2261 |
/**
|
|
2262 |
* Peeks at next byte value in stream. Similar to read(), except
|
|
2263 |
* that it does not consume the read value.
|
|
2264 |
*/
|
|
2265 |
int peek() throws IOException {
|
|
2266 |
return (peekb >= 0) ? peekb : (peekb = in.read());
|
|
2267 |
}
|
|
2268 |
|
|
2269 |
public int read() throws IOException {
|
|
2270 |
if (peekb >= 0) {
|
|
2271 |
int v = peekb;
|
|
2272 |
peekb = -1;
|
|
2273 |
return v;
|
|
2274 |
} else {
|
|
2275 |
return in.read();
|
|
2276 |
}
|
|
2277 |
}
|
|
2278 |
|
|
2279 |
public int read(byte[] b, int off, int len) throws IOException {
|
|
2280 |
if (len == 0) {
|
|
2281 |
return 0;
|
|
2282 |
} else if (peekb < 0) {
|
|
2283 |
return in.read(b, off, len);
|
|
2284 |
} else {
|
|
2285 |
b[off++] = (byte) peekb;
|
|
2286 |
len--;
|
|
2287 |
peekb = -1;
|
|
2288 |
int n = in.read(b, off, len);
|
|
2289 |
return (n >= 0) ? (n + 1) : 1;
|
|
2290 |
}
|
|
2291 |
}
|
|
2292 |
|
|
2293 |
void readFully(byte[] b, int off, int len) throws IOException {
|
|
2294 |
int n = 0;
|
|
2295 |
while (n < len) {
|
|
2296 |
int count = read(b, off + n, len - n);
|
|
2297 |
if (count < 0) {
|
|
2298 |
throw new EOFException();
|
|
2299 |
}
|
|
2300 |
n += count;
|
|
2301 |
}
|
|
2302 |
}
|
|
2303 |
|
|
2304 |
public long skip(long n) throws IOException {
|
|
2305 |
if (n <= 0) {
|
|
2306 |
return 0;
|
|
2307 |
}
|
|
2308 |
int skipped = 0;
|
|
2309 |
if (peekb >= 0) {
|
|
2310 |
peekb = -1;
|
|
2311 |
skipped++;
|
|
2312 |
n--;
|
|
2313 |
}
|
|
2314 |
return skipped + skip(n);
|
|
2315 |
}
|
|
2316 |
|
|
2317 |
public int available() throws IOException {
|
|
2318 |
return in.available() + ((peekb >= 0) ? 1 : 0);
|
|
2319 |
}
|
|
2320 |
|
|
2321 |
public void close() throws IOException {
|
|
2322 |
in.close();
|
|
2323 |
}
|
|
2324 |
}
|
|
2325 |
|
|
2326 |
/**
|
|
2327 |
* Input stream with two modes: in default mode, inputs data written in the
|
|
2328 |
* same format as DataOutputStream; in "block data" mode, inputs data
|
|
2329 |
* bracketed by block data markers (see object serialization specification
|
|
2330 |
* for details). Buffering depends on block data mode: when in default
|
|
2331 |
* mode, no data is buffered in advance; when in block data mode, all data
|
|
2332 |
* for the current data block is read in at once (and buffered).
|
|
2333 |
*/
|
|
2334 |
private class BlockDataInputStream
|
|
2335 |
extends InputStream implements DataInput
|
|
2336 |
{
|
|
2337 |
/** maximum data block length */
|
|
2338 |
private static final int MAX_BLOCK_SIZE = 1024;
|
|
2339 |
/** maximum data block header length */
|
|
2340 |
private static final int MAX_HEADER_SIZE = 5;
|
|
2341 |
/** (tunable) length of char buffer (for reading strings) */
|
|
2342 |
private static final int CHAR_BUF_SIZE = 256;
|
|
2343 |
/** readBlockHeader() return value indicating header read may block */
|
|
2344 |
private static final int HEADER_BLOCKED = -2;
|
|
2345 |
|
|
2346 |
/** buffer for reading general/block data */
|
|
2347 |
private final byte[] buf = new byte[MAX_BLOCK_SIZE];
|
|
2348 |
/** buffer for reading block data headers */
|
|
2349 |
private final byte[] hbuf = new byte[MAX_HEADER_SIZE];
|
|
2350 |
/** char buffer for fast string reads */
|
|
2351 |
private final char[] cbuf = new char[CHAR_BUF_SIZE];
|
|
2352 |
|
|
2353 |
/** block data mode */
|
|
2354 |
private boolean blkmode = false;
|
|
2355 |
|
|
2356 |
// block data state fields; values meaningful only when blkmode true
|
|
2357 |
/** current offset into buf */
|
|
2358 |
private int pos = 0;
|
|
2359 |
/** end offset of valid data in buf, or -1 if no more block data */
|
|
2360 |
private int end = -1;
|
|
2361 |
/** number of bytes in current block yet to be read from stream */
|
|
2362 |
private int unread = 0;
|
|
2363 |
|
|
2364 |
/** underlying stream (wrapped in peekable filter stream) */
|
|
2365 |
private final PeekInputStream in;
|
|
2366 |
/** loopback stream (for data reads that span data blocks) */
|
|
2367 |
private final DataInputStream din;
|
|
2368 |
|
|
2369 |
/**
|
|
2370 |
* Creates new BlockDataInputStream on top of given underlying stream.
|
|
2371 |
* Block data mode is turned off by default.
|
|
2372 |
*/
|
|
2373 |
BlockDataInputStream(InputStream in) {
|
|
2374 |
this.in = new PeekInputStream(in);
|
|
2375 |
din = new DataInputStream(this);
|
|
2376 |
}
|
|
2377 |
|
|
2378 |
/**
|
|
2379 |
* Sets block data mode to the given mode (true == on, false == off)
|
|
2380 |
* and returns the previous mode value. If the new mode is the same as
|
|
2381 |
* the old mode, no action is taken. Throws IllegalStateException if
|
|
2382 |
* block data mode is being switched from on to off while unconsumed
|
|
2383 |
* block data is still present in the stream.
|
|
2384 |
*/
|
|
2385 |
boolean setBlockDataMode(boolean newmode) throws IOException {
|
|
2386 |
if (blkmode == newmode) {
|
|
2387 |
return blkmode;
|
|
2388 |
}
|
|
2389 |
if (newmode) {
|
|
2390 |
pos = 0;
|
|
2391 |
end = 0;
|
|
2392 |
unread = 0;
|
|
2393 |
} else if (pos < end) {
|
|
2394 |
throw new IllegalStateException("unread block data");
|
|
2395 |
}
|
|
2396 |
blkmode = newmode;
|
|
2397 |
return !blkmode;
|
|
2398 |
}
|
|
2399 |
|
|
2400 |
/**
|
|
2401 |
* Returns true if the stream is currently in block data mode, false
|
|
2402 |
* otherwise.
|
|
2403 |
*/
|
|
2404 |
boolean getBlockDataMode() {
|
|
2405 |
return blkmode;
|
|
2406 |
}
|
|
2407 |
|
|
2408 |
/**
|
|
2409 |
* If in block data mode, skips to the end of the current group of data
|
|
2410 |
* blocks (but does not unset block data mode). If not in block data
|
|
2411 |
* mode, throws an IllegalStateException.
|
|
2412 |
*/
|
|
2413 |
void skipBlockData() throws IOException {
|
|
2414 |
if (!blkmode) {
|
|
2415 |
throw new IllegalStateException("not in block data mode");
|
|
2416 |
}
|
|
2417 |
while (end >= 0) {
|
|
2418 |
refill();
|
|
2419 |
}
|
|
2420 |
}
|
|
2421 |
|
|
2422 |
/**
|
|
2423 |
* Attempts to read in the next block data header (if any). If
|
|
2424 |
* canBlock is false and a full header cannot be read without possibly
|
|
2425 |
* blocking, returns HEADER_BLOCKED, else if the next element in the
|
|
2426 |
* stream is a block data header, returns the block data length
|
|
2427 |
* specified by the header, else returns -1.
|
|
2428 |
*/
|
|
2429 |
private int readBlockHeader(boolean canBlock) throws IOException {
|
|
2430 |
if (defaultDataEnd) {
|
|
2431 |
/*
|
|
2432 |
* Fix for 4360508: stream is currently at the end of a field
|
|
2433 |
* value block written via default serialization; since there
|
|
2434 |
* is no terminating TC_ENDBLOCKDATA tag, simulate
|
|
2435 |
* end-of-custom-data behavior explicitly.
|
|
2436 |
*/
|
|
2437 |
return -1;
|
|
2438 |
}
|
|
2439 |
try {
|
|
2440 |
for (;;) {
|
|
2441 |
int avail = canBlock ? Integer.MAX_VALUE : in.available();
|
|
2442 |
if (avail == 0) {
|
|
2443 |
return HEADER_BLOCKED;
|
|
2444 |
}
|
|
2445 |
|
|
2446 |
int tc = in.peek();
|
|
2447 |
switch (tc) {
|
|
2448 |
case TC_BLOCKDATA:
|
|
2449 |
if (avail < 2) {
|
|
2450 |
return HEADER_BLOCKED;
|
|
2451 |
}
|
|
2452 |
in.readFully(hbuf, 0, 2);
|
|
2453 |
return hbuf[1] & 0xFF;
|
|
2454 |
|
|
2455 |
case TC_BLOCKDATALONG:
|
|
2456 |
if (avail < 5) {
|
|
2457 |
return HEADER_BLOCKED;
|
|
2458 |
}
|
|
2459 |
in.readFully(hbuf, 0, 5);
|
|
2460 |
int len = Bits.getInt(hbuf, 1);
|
|
2461 |
if (len < 0) {
|
|
2462 |
throw new StreamCorruptedException(
|
|
2463 |
"illegal block data header length: " +
|
|
2464 |
len);
|
|
2465 |
}
|
|
2466 |
return len;
|
|
2467 |
|
|
2468 |
/*
|
|
2469 |
* TC_RESETs may occur in between data blocks.
|
|
2470 |
* Unfortunately, this case must be parsed at a lower
|
|
2471 |
* level than other typecodes, since primitive data
|
|
2472 |
* reads may span data blocks separated by a TC_RESET.
|
|
2473 |
*/
|
|
2474 |
case TC_RESET:
|
|
2475 |
in.read();
|
|
2476 |
handleReset();
|
|
2477 |
break;
|
|
2478 |
|
|
2479 |
default:
|
|
2480 |
if (tc >= 0 && (tc < TC_BASE || tc > TC_MAX)) {
|
|
2481 |
throw new StreamCorruptedException(
|
|
2482 |
String.format("invalid type code: %02X",
|
|
2483 |
tc));
|
|
2484 |
}
|
|
2485 |
return -1;
|
|
2486 |
}
|
|
2487 |
}
|
|
2488 |
} catch (EOFException ex) {
|
|
2489 |
throw new StreamCorruptedException(
|
|
2490 |
"unexpected EOF while reading block data header");
|
|
2491 |
}
|
|
2492 |
}
|
|
2493 |
|
|
2494 |
/**
|
|
2495 |
* Refills internal buffer buf with block data. Any data in buf at the
|
|
2496 |
* time of the call is considered consumed. Sets the pos, end, and
|
|
2497 |
* unread fields to reflect the new amount of available block data; if
|
|
2498 |
* the next element in the stream is not a data block, sets pos and
|
|
2499 |
* unread to 0 and end to -1.
|
|
2500 |
*/
|
|
2501 |
private void refill() throws IOException {
|
|
2502 |
try {
|
|
2503 |
do {
|
|
2504 |
pos = 0;
|
|
2505 |
if (unread > 0) {
|
|
2506 |
int n =
|
|
2507 |
in.read(buf, 0, Math.min(unread, MAX_BLOCK_SIZE));
|
|
2508 |
if (n >= 0) {
|
|
2509 |
end = n;
|
|
2510 |
unread -= n;
|
|
2511 |
} else {
|
|
2512 |
throw new StreamCorruptedException(
|
|
2513 |
"unexpected EOF in middle of data block");
|
|
2514 |
}
|
|
2515 |
} else {
|
|
2516 |
int n = readBlockHeader(true);
|
|
2517 |
if (n >= 0) {
|
|
2518 |
end = 0;
|
|
2519 |
unread = n;
|
|
2520 |
} else {
|
|
2521 |
end = -1;
|
|
2522 |
unread = 0;
|
|
2523 |
}
|
|
2524 |
}
|
|
2525 |
} while (pos == end);
|
|
2526 |
} catch (IOException ex) {
|
|
2527 |
pos = 0;
|
|
2528 |
end = -1;
|
|
2529 |
unread = 0;
|
|
2530 |
throw ex;
|
|
2531 |
}
|
|
2532 |
}
|
|
2533 |
|
|
2534 |
/**
|
|
2535 |
* If in block data mode, returns the number of unconsumed bytes
|
|
2536 |
* remaining in the current data block. If not in block data mode,
|
|
2537 |
* throws an IllegalStateException.
|
|
2538 |
*/
|
|
2539 |
int currentBlockRemaining() {
|
|
2540 |
if (blkmode) {
|
|
2541 |
return (end >= 0) ? (end - pos) + unread : 0;
|
|
2542 |
} else {
|
|
2543 |
throw new IllegalStateException();
|
|
2544 |
}
|
|
2545 |
}
|
|
2546 |
|
|
2547 |
/**
|
|
2548 |
* Peeks at (but does not consume) and returns the next byte value in
|
|
2549 |
* the stream, or -1 if the end of the stream/block data (if in block
|
|
2550 |
* data mode) has been reached.
|
|
2551 |
*/
|
|
2552 |
int peek() throws IOException {
|
|
2553 |
if (blkmode) {
|
|
2554 |
if (pos == end) {
|
|
2555 |
refill();
|
|
2556 |
}
|
|
2557 |
return (end >= 0) ? (buf[pos] & 0xFF) : -1;
|
|
2558 |
} else {
|
|
2559 |
return in.peek();
|
|
2560 |
}
|
|
2561 |
}
|
|
2562 |
|
|
2563 |
/**
|
|
2564 |
* Peeks at (but does not consume) and returns the next byte value in
|
|
2565 |
* the stream, or throws EOFException if end of stream/block data has
|
|
2566 |
* been reached.
|
|
2567 |
*/
|
|
2568 |
byte peekByte() throws IOException {
|
|
2569 |
int val = peek();
|
|
2570 |
if (val < 0) {
|
|
2571 |
throw new EOFException();
|
|
2572 |
}
|
|
2573 |
return (byte) val;
|
|
2574 |
}
|
|
2575 |
|
|
2576 |
|
|
2577 |
/* ----------------- generic input stream methods ------------------ */
|
|
2578 |
/*
|
|
2579 |
* The following methods are equivalent to their counterparts in
|
|
2580 |
* InputStream, except that they interpret data block boundaries and
|
|
2581 |
* read the requested data from within data blocks when in block data
|
|
2582 |
* mode.
|
|
2583 |
*/
|
|
2584 |
|
|
2585 |
public int read() throws IOException {
|
|
2586 |
if (blkmode) {
|
|
2587 |
if (pos == end) {
|
|
2588 |
refill();
|
|
2589 |
}
|
|
2590 |
return (end >= 0) ? (buf[pos++] & 0xFF) : -1;
|
|
2591 |
} else {
|
|
2592 |
return in.read();
|
|
2593 |
}
|
|
2594 |
}
|
|
2595 |
|
|
2596 |
public int read(byte[] b, int off, int len) throws IOException {
|
|
2597 |
return read(b, off, len, false);
|
|
2598 |
}
|
|
2599 |
|
|
2600 |
public long skip(long len) throws IOException {
|
|
2601 |
long remain = len;
|
|
2602 |
while (remain > 0) {
|
|
2603 |
if (blkmode) {
|
|
2604 |
if (pos == end) {
|
|
2605 |
refill();
|
|
2606 |
}
|
|
2607 |
if (end < 0) {
|
|
2608 |
break;
|
|
2609 |
}
|
|
2610 |
int nread = (int) Math.min(remain, end - pos);
|
|
2611 |
remain -= nread;
|
|
2612 |
pos += nread;
|
|
2613 |
} else {
|
|
2614 |
int nread = (int) Math.min(remain, MAX_BLOCK_SIZE);
|
|
2615 |
if ((nread = in.read(buf, 0, nread)) < 0) {
|
|
2616 |
break;
|
|
2617 |
}
|
|
2618 |
remain -= nread;
|
|
2619 |
}
|
|
2620 |
}
|
|
2621 |
return len - remain;
|
|
2622 |
}
|
|
2623 |
|
|
2624 |
public int available() throws IOException {
|
|
2625 |
if (blkmode) {
|
|
2626 |
if ((pos == end) && (unread == 0)) {
|
|
2627 |
int n;
|
|
2628 |
while ((n = readBlockHeader(false)) == 0) ;
|
|
2629 |
switch (n) {
|
|
2630 |
case HEADER_BLOCKED:
|
|
2631 |
break;
|
|
2632 |
|
|
2633 |
case -1:
|
|
2634 |
pos = 0;
|
|
2635 |
end = -1;
|
|
2636 |
break;
|
|
2637 |
|
|
2638 |
default:
|
|
2639 |
pos = 0;
|
|
2640 |
end = 0;
|
|
2641 |
unread = n;
|
|
2642 |
break;
|
|
2643 |
}
|
|
2644 |
}
|
|
2645 |
// avoid unnecessary call to in.available() if possible
|
|
2646 |
int unreadAvail = (unread > 0) ?
|
|
2647 |
Math.min(in.available(), unread) : 0;
|
|
2648 |
return (end >= 0) ? (end - pos) + unreadAvail : 0;
|
|
2649 |
} else {
|
|
2650 |
return in.available();
|
|
2651 |
}
|
|
2652 |
}
|
|
2653 |
|
|
2654 |
public void close() throws IOException {
|
|
2655 |
if (blkmode) {
|
|
2656 |
pos = 0;
|
|
2657 |
end = -1;
|
|
2658 |
unread = 0;
|
|
2659 |
}
|
|
2660 |
in.close();
|
|
2661 |
}
|
|
2662 |
|
|
2663 |
/**
|
|
2664 |
* Attempts to read len bytes into byte array b at offset off. Returns
|
|
2665 |
* the number of bytes read, or -1 if the end of stream/block data has
|
|
2666 |
* been reached. If copy is true, reads values into an intermediate
|
|
2667 |
* buffer before copying them to b (to avoid exposing a reference to
|
|
2668 |
* b).
|
|
2669 |
*/
|
|
2670 |
int read(byte[] b, int off, int len, boolean copy) throws IOException {
|
|
2671 |
if (len == 0) {
|
|
2672 |
return 0;
|
|
2673 |
} else if (blkmode) {
|
|
2674 |
if (pos == end) {
|
|
2675 |
refill();
|
|
2676 |
}
|
|
2677 |
if (end < 0) {
|
|
2678 |
return -1;
|
|
2679 |
}
|
|
2680 |
int nread = Math.min(len, end - pos);
|
|
2681 |
System.arraycopy(buf, pos, b, off, nread);
|
|
2682 |
pos += nread;
|
|
2683 |
return nread;
|
|
2684 |
} else if (copy) {
|
|
2685 |
int nread = in.read(buf, 0, Math.min(len, MAX_BLOCK_SIZE));
|
|
2686 |
if (nread > 0) {
|
|
2687 |
System.arraycopy(buf, 0, b, off, nread);
|
|
2688 |
}
|
|
2689 |
return nread;
|
|
2690 |
} else {
|
|
2691 |
return in.read(b, off, len);
|
|
2692 |
}
|
|
2693 |
}
|
|
2694 |
|
|
2695 |
/* ----------------- primitive data input methods ------------------ */
|
|
2696 |
/*
|
|
2697 |
* The following methods are equivalent to their counterparts in
|
|
2698 |
* DataInputStream, except that they interpret data block boundaries
|
|
2699 |
* and read the requested data from within data blocks when in block
|
|
2700 |
* data mode.
|
|
2701 |
*/
|
|
2702 |
|
|
2703 |
public void readFully(byte[] b) throws IOException {
|
|
2704 |
readFully(b, 0, b.length, false);
|
|
2705 |
}
|
|
2706 |
|
|
2707 |
public void readFully(byte[] b, int off, int len) throws IOException {
|
|
2708 |
readFully(b, off, len, false);
|
|
2709 |
}
|
|
2710 |
|
|
2711 |
public void readFully(byte[] b, int off, int len, boolean copy)
|
|
2712 |
throws IOException
|
|
2713 |
{
|
|
2714 |
while (len > 0) {
|
|
2715 |
int n = read(b, off, len, copy);
|
|
2716 |
if (n < 0) {
|
|
2717 |
throw new EOFException();
|
|
2718 |
}
|
|
2719 |
off += n;
|
|
2720 |
len -= n;
|
|
2721 |
}
|
|
2722 |
}
|
|
2723 |
|
|
2724 |
public int skipBytes(int n) throws IOException {
|
|
2725 |
return din.skipBytes(n);
|
|
2726 |
}
|
|
2727 |
|
|
2728 |
public boolean readBoolean() throws IOException {
|
|
2729 |
int v = read();
|
|
2730 |
if (v < 0) {
|
|
2731 |
throw new EOFException();
|
|
2732 |
}
|
|
2733 |
return (v != 0);
|
|
2734 |
}
|
|
2735 |
|
|
2736 |
public byte readByte() throws IOException {
|
|
2737 |
int v = read();
|
|
2738 |
if (v < 0) {
|
|
2739 |
throw new EOFException();
|
|
2740 |
}
|
|
2741 |
return (byte) v;
|
|
2742 |
}
|
|
2743 |
|
|
2744 |
public int readUnsignedByte() throws IOException {
|
|
2745 |
int v = read();
|
|
2746 |
if (v < 0) {
|
|
2747 |
throw new EOFException();
|
|
2748 |
}
|
|
2749 |
return v;
|
|
2750 |
}
|
|
2751 |
|
|
2752 |
public char readChar() throws IOException {
|
|
2753 |
if (!blkmode) {
|
|
2754 |
pos = 0;
|
|
2755 |
in.readFully(buf, 0, 2);
|
|
2756 |
} else if (end - pos < 2) {
|
|
2757 |
return din.readChar();
|
|
2758 |
}
|
|
2759 |
char v = Bits.getChar(buf, pos);
|
|
2760 |
pos += 2;
|
|
2761 |
return v;
|
|
2762 |
}
|
|
2763 |
|
|
2764 |
public short readShort() throws IOException {
|
|
2765 |
if (!blkmode) {
|
|
2766 |
pos = 0;
|
|
2767 |
in.readFully(buf, 0, 2);
|
|
2768 |
} else if (end - pos < 2) {
|
|
2769 |
return din.readShort();
|
|
2770 |
}
|
|
2771 |
short v = Bits.getShort(buf, pos);
|
|
2772 |
pos += 2;
|
|
2773 |
return v;
|
|
2774 |
}
|
|
2775 |
|
|
2776 |
public int readUnsignedShort() throws IOException {
|
|
2777 |
if (!blkmode) {
|
|
2778 |
pos = 0;
|
|
2779 |
in.readFully(buf, 0, 2);
|
|
2780 |
} else if (end - pos < 2) {
|
|
2781 |
return din.readUnsignedShort();
|
|
2782 |
}
|
|
2783 |
int v = Bits.getShort(buf, pos) & 0xFFFF;
|
|
2784 |
pos += 2;
|
|
2785 |
return v;
|
|
2786 |
}
|
|
2787 |
|
|
2788 |
public int readInt() throws IOException {
|
|
2789 |
if (!blkmode) {
|
|
2790 |
pos = 0;
|
|
2791 |
in.readFully(buf, 0, 4);
|
|
2792 |
} else if (end - pos < 4) {
|
|
2793 |
return din.readInt();
|
|
2794 |
}
|
|
2795 |
int v = Bits.getInt(buf, pos);
|
|
2796 |
pos += 4;
|
|
2797 |
return v;
|
|
2798 |
}
|
|
2799 |
|
|
2800 |
public float readFloat() throws IOException {
|
|
2801 |
if (!blkmode) {
|
|
2802 |
pos = 0;
|
|
2803 |
in.readFully(buf, 0, 4);
|
|
2804 |
} else if (end - pos < 4) {
|
|
2805 |
return din.readFloat();
|
|
2806 |
}
|
|
2807 |
float v = Bits.getFloat(buf, pos);
|
|
2808 |
pos += 4;
|
|
2809 |
return v;
|
|
2810 |
}
|
|
2811 |
|
|
2812 |
public long readLong() throws IOException {
|
|
2813 |
if (!blkmode) {
|
|
2814 |
pos = 0;
|
|
2815 |
in.readFully(buf, 0, 8);
|
|
2816 |
} else if (end - pos < 8) {
|
|
2817 |
return din.readLong();
|
|
2818 |
}
|
|
2819 |
long v = Bits.getLong(buf, pos);
|
|
2820 |
pos += 8;
|
|
2821 |
return v;
|
|
2822 |
}
|
|
2823 |
|
|
2824 |
public double readDouble() throws IOException {
|
|
2825 |
if (!blkmode) {
|
|
2826 |
pos = 0;
|
|
2827 |
in.readFully(buf, 0, 8);
|
|
2828 |
} else if (end - pos < 8) {
|
|
2829 |
return din.readDouble();
|
|
2830 |
}
|
|
2831 |
double v = Bits.getDouble(buf, pos);
|
|
2832 |
pos += 8;
|
|
2833 |
return v;
|
|
2834 |
}
|
|
2835 |
|
|
2836 |
public String readUTF() throws IOException {
|
|
2837 |
return readUTFBody(readUnsignedShort());
|
|
2838 |
}
|
|
2839 |
|
|
2840 |
public String readLine() throws IOException {
|
|
2841 |
return din.readLine(); // deprecated, not worth optimizing
|
|
2842 |
}
|
|
2843 |
|
|
2844 |
/* -------------- primitive data array input methods --------------- */
|
|
2845 |
/*
|
|
2846 |
* The following methods read in spans of primitive data values.
|
|
2847 |
* Though equivalent to calling the corresponding primitive read
|
|
2848 |
* methods repeatedly, these methods are optimized for reading groups
|
|
2849 |
* of primitive data values more efficiently.
|
|
2850 |
*/
|
|
2851 |
|
|
2852 |
void readBooleans(boolean[] v, int off, int len) throws IOException {
|
|
2853 |
int stop, endoff = off + len;
|
|
2854 |
while (off < endoff) {
|
|
2855 |
if (!blkmode) {
|
|
2856 |
int span = Math.min(endoff - off, MAX_BLOCK_SIZE);
|
|
2857 |
in.readFully(buf, 0, span);
|
|
2858 |
stop = off + span;
|
|
2859 |
pos = 0;
|
|
2860 |
} else if (end - pos < 1) {
|
|
2861 |
v[off++] = din.readBoolean();
|
|
2862 |
continue;
|
|
2863 |
} else {
|
|
2864 |
stop = Math.min(endoff, off + end - pos);
|
|
2865 |
}
|
|
2866 |
|
|
2867 |
while (off < stop) {
|
|
2868 |
v[off++] = Bits.getBoolean(buf, pos++);
|
|
2869 |
}
|
|
2870 |
}
|
|
2871 |
}
|
|
2872 |
|
|
2873 |
void readChars(char[] v, int off, int len) throws IOException {
|
|
2874 |
int stop, endoff = off + len;
|
|
2875 |
while (off < endoff) {
|
|
2876 |
if (!blkmode) {
|
|
2877 |
int span = Math.min(endoff - off, MAX_BLOCK_SIZE >> 1);
|
|
2878 |
in.readFully(buf, 0, span << 1);
|
|
2879 |
stop = off + span;
|
|
2880 |
pos = 0;
|
|
2881 |
} else if (end - pos < 2) {
|
|
2882 |
v[off++] = din.readChar();
|
|
2883 |
continue;
|
|
2884 |
} else {
|
|
2885 |
stop = Math.min(endoff, off + ((end - pos) >> 1));
|
|
2886 |
}
|
|
2887 |
|
|
2888 |
while (off < stop) {
|
|
2889 |
v[off++] = Bits.getChar(buf, pos);
|
|
2890 |
pos += 2;
|
|
2891 |
}
|
|
2892 |
}
|
|
2893 |
}
|
|
2894 |
|
|
2895 |
void readShorts(short[] v, int off, int len) throws IOException {
|
|
2896 |
int stop, endoff = off + len;
|
|
2897 |
while (off < endoff) {
|
|
2898 |
if (!blkmode) {
|
|
2899 |
int span = Math.min(endoff - off, MAX_BLOCK_SIZE >> 1);
|
|
2900 |
in.readFully(buf, 0, span << 1);
|
|
2901 |
stop = off + span;
|
|
2902 |
pos = 0;
|
|
2903 |
} else if (end - pos < 2) {
|
|
2904 |
v[off++] = din.readShort();
|
|
2905 |
continue;
|
|
2906 |
} else {
|
|
2907 |
stop = Math.min(endoff, off + ((end - pos) >> 1));
|
|
2908 |
}
|
|
2909 |
|
|
2910 |
while (off < stop) {
|
|
2911 |
v[off++] = Bits.getShort(buf, pos);
|
|
2912 |
pos += 2;
|
|
2913 |
}
|
|
2914 |
}
|
|
2915 |
}
|
|
2916 |
|
|
2917 |
void readInts(int[] v, int off, int len) throws IOException {
|
|
2918 |
int stop, endoff = off + len;
|
|
2919 |
while (off < endoff) {
|
|
2920 |
if (!blkmode) {
|
|
2921 |
int span = Math.min(endoff - off, MAX_BLOCK_SIZE >> 2);
|
|
2922 |
in.readFully(buf, 0, span << 2);
|
|
2923 |
stop = off + span;
|
|
2924 |
pos = 0;
|
|
2925 |
} else if (end - pos < 4) {
|
|
2926 |
v[off++] = din.readInt();
|
|
2927 |
continue;
|
|
2928 |
} else {
|
|
2929 |
stop = Math.min(endoff, off + ((end - pos) >> 2));
|
|
2930 |
}
|
|
2931 |
|
|
2932 |
while (off < stop) {
|
|
2933 |
v[off++] = Bits.getInt(buf, pos);
|
|
2934 |
pos += 4;
|
|
2935 |
}
|
|
2936 |
}
|
|
2937 |
}
|
|
2938 |
|
|
2939 |
void readFloats(float[] v, int off, int len) throws IOException {
|
|
2940 |
int span, endoff = off + len;
|
|
2941 |
while (off < endoff) {
|
|
2942 |
if (!blkmode) {
|
|
2943 |
span = Math.min(endoff - off, MAX_BLOCK_SIZE >> 2);
|
|
2944 |
in.readFully(buf, 0, span << 2);
|
|
2945 |
pos = 0;
|
|
2946 |
} else if (end - pos < 4) {
|
|
2947 |
v[off++] = din.readFloat();
|
|
2948 |
continue;
|
|
2949 |
} else {
|
|
2950 |
span = Math.min(endoff - off, ((end - pos) >> 2));
|
|
2951 |
}
|
|
2952 |
|
|
2953 |
bytesToFloats(buf, pos, v, off, span);
|
|
2954 |
off += span;
|
|
2955 |
pos += span << 2;
|
|
2956 |
}
|
|
2957 |
}
|
|
2958 |
|
|
2959 |
void readLongs(long[] v, int off, int len) throws IOException {
|
|
2960 |
int stop, endoff = off + len;
|
|
2961 |
while (off < endoff) {
|
|
2962 |
if (!blkmode) {
|
|
2963 |
int span = Math.min(endoff - off, MAX_BLOCK_SIZE >> 3);
|
|
2964 |
in.readFully(buf, 0, span << 3);
|
|
2965 |
stop = off + span;
|
|
2966 |
pos = 0;
|
|
2967 |
} else if (end - pos < 8) {
|
|
2968 |
v[off++] = din.readLong();
|
|
2969 |
continue;
|
|
2970 |
} else {
|
|
2971 |
stop = Math.min(endoff, off + ((end - pos) >> 3));
|
|
2972 |
}
|
|
2973 |
|
|
2974 |
while (off < stop) {
|
|
2975 |
v[off++] = Bits.getLong(buf, pos);
|
|
2976 |
pos += 8;
|
|
2977 |
}
|
|
2978 |
}
|
|
2979 |
}
|
|
2980 |
|
|
2981 |
void readDoubles(double[] v, int off, int len) throws IOException {
|
|
2982 |
int span, endoff = off + len;
|
|
2983 |
while (off < endoff) {
|
|
2984 |
if (!blkmode) {
|
|
2985 |
span = Math.min(endoff - off, MAX_BLOCK_SIZE >> 3);
|
|
2986 |
in.readFully(buf, 0, span << 3);
|
|
2987 |
pos = 0;
|
|
2988 |
} else if (end - pos < 8) {
|
|
2989 |
v[off++] = din.readDouble();
|
|
2990 |
continue;
|
|
2991 |
} else {
|
|
2992 |
span = Math.min(endoff - off, ((end - pos) >> 3));
|
|
2993 |
}
|
|
2994 |
|
|
2995 |
bytesToDoubles(buf, pos, v, off, span);
|
|
2996 |
off += span;
|
|
2997 |
pos += span << 3;
|
|
2998 |
}
|
|
2999 |
}
|
|
3000 |
|
|
3001 |
/**
|
|
3002 |
* Reads in string written in "long" UTF format. "Long" UTF format is
|
|
3003 |
* identical to standard UTF, except that it uses an 8 byte header
|
|
3004 |
* (instead of the standard 2 bytes) to convey the UTF encoding length.
|
|
3005 |
*/
|
|
3006 |
String readLongUTF() throws IOException {
|
|
3007 |
return readUTFBody(readLong());
|
|
3008 |
}
|
|
3009 |
|
|
3010 |
/**
|
|
3011 |
* Reads in the "body" (i.e., the UTF representation minus the 2-byte
|
|
3012 |
* or 8-byte length header) of a UTF encoding, which occupies the next
|
|
3013 |
* utflen bytes.
|
|
3014 |
*/
|
|
3015 |
private String readUTFBody(long utflen) throws IOException {
|
|
3016 |
StringBuilder sbuf = new StringBuilder();
|
|
3017 |
if (!blkmode) {
|
|
3018 |
end = pos = 0;
|
|
3019 |
}
|
|
3020 |
|
|
3021 |
while (utflen > 0) {
|
|
3022 |
int avail = end - pos;
|
|
3023 |
if (avail >= 3 || (long) avail == utflen) {
|
|
3024 |
utflen -= readUTFSpan(sbuf, utflen);
|
|
3025 |
} else {
|
|
3026 |
if (blkmode) {
|
|
3027 |
// near block boundary, read one byte at a time
|
|
3028 |
utflen -= readUTFChar(sbuf, utflen);
|
|
3029 |
} else {
|
|
3030 |
// shift and refill buffer manually
|
|
3031 |
if (avail > 0) {
|
|
3032 |
System.arraycopy(buf, pos, buf, 0, avail);
|
|
3033 |
}
|
|
3034 |
pos = 0;
|
|
3035 |
end = (int) Math.min(MAX_BLOCK_SIZE, utflen);
|
|
3036 |
in.readFully(buf, avail, end - avail);
|
|
3037 |
}
|
|
3038 |
}
|
|
3039 |
}
|
|
3040 |
|
|
3041 |
return sbuf.toString();
|
|
3042 |
}
|
|
3043 |
|
|
3044 |
/**
|
|
3045 |
* Reads span of UTF-encoded characters out of internal buffer
|
|
3046 |
* (starting at offset pos and ending at or before offset end),
|
|
3047 |
* consuming no more than utflen bytes. Appends read characters to
|
|
3048 |
* sbuf. Returns the number of bytes consumed.
|
|
3049 |
*/
|
|
3050 |
private long readUTFSpan(StringBuilder sbuf, long utflen)
|
|
3051 |
throws IOException
|
|
3052 |
{
|
|
3053 |
int cpos = 0;
|
|
3054 |
int start = pos;
|
|
3055 |
int avail = Math.min(end - pos, CHAR_BUF_SIZE);
|
|
3056 |
// stop short of last char unless all of utf bytes in buffer
|
|
3057 |
int stop = pos + ((utflen > avail) ? avail - 2 : (int) utflen);
|
|
3058 |
boolean outOfBounds = false;
|
|
3059 |
|
|
3060 |
try {
|
|
3061 |
while (pos < stop) {
|
|
3062 |
int b1, b2, b3;
|
|
3063 |
b1 = buf[pos++] & 0xFF;
|
|
3064 |
switch (b1 >> 4) {
|
|
3065 |
case 0:
|
|
3066 |
case 1:
|
|
3067 |
case 2:
|
|
3068 |
case 3:
|
|
3069 |
case 4:
|
|
3070 |
case 5:
|
|
3071 |
case 6:
|
|
3072 |
case 7: // 1 byte format: 0xxxxxxx
|
|
3073 |
cbuf[cpos++] = (char) b1;
|
|
3074 |
break;
|
|
3075 |
|
|
3076 |
case 12:
|
|
3077 |
case 13: // 2 byte format: 110xxxxx 10xxxxxx
|
|
3078 |
b2 = buf[pos++];
|
|
3079 |
if ((b2 & 0xC0) != 0x80) {
|
|
3080 |
throw new UTFDataFormatException();
|
|
3081 |
}
|
|
3082 |
cbuf[cpos++] = (char) (((b1 & 0x1F) << 6) |
|
|
3083 |
((b2 & 0x3F) << 0));
|
|
3084 |
break;
|
|
3085 |
|
|
3086 |
case 14: // 3 byte format: 1110xxxx 10xxxxxx 10xxxxxx
|
|
3087 |
b3 = buf[pos + 1];
|
|
3088 |
b2 = buf[pos + 0];
|
|
3089 |
pos += 2;
|
|
3090 |
if ((b2 & 0xC0) != 0x80 || (b3 & 0xC0) != 0x80) {
|
|
3091 |
throw new UTFDataFormatException();
|
|
3092 |
}
|
|
3093 |
cbuf[cpos++] = (char) (((b1 & 0x0F) << 12) |
|
|
3094 |
((b2 & 0x3F) << 6) |
|
|
3095 |
((b3 & 0x3F) << 0));
|
|
3096 |
break;
|
|
3097 |
|
|
3098 |
default: // 10xx xxxx, 1111 xxxx
|
|
3099 |
throw new UTFDataFormatException();
|
|
3100 |
}
|
|
3101 |
}
|
|
3102 |
} catch (ArrayIndexOutOfBoundsException ex) {
|
|
3103 |
outOfBounds = true;
|
|
3104 |
} finally {
|
|
3105 |
if (outOfBounds || (pos - start) > utflen) {
|
|
3106 |
/*
|
|
3107 |
* Fix for 4450867: if a malformed utf char causes the
|
|
3108 |
* conversion loop to scan past the expected end of the utf
|
|
3109 |
* string, only consume the expected number of utf bytes.
|
|
3110 |
*/
|
|
3111 |
pos = start + (int) utflen;
|
|
3112 |
throw new UTFDataFormatException();
|
|
3113 |
}
|
|
3114 |
}
|
|
3115 |
|
|
3116 |
sbuf.append(cbuf, 0, cpos);
|
|
3117 |
return pos - start;
|
|
3118 |
}
|
|
3119 |
|
|
3120 |
/**
|
|
3121 |
* Reads in single UTF-encoded character one byte at a time, appends
|
|
3122 |
* the character to sbuf, and returns the number of bytes consumed.
|
|
3123 |
* This method is used when reading in UTF strings written in block
|
|
3124 |
* data mode to handle UTF-encoded characters which (potentially)
|
|
3125 |
* straddle block-data boundaries.
|
|
3126 |
*/
|
|
3127 |
private int readUTFChar(StringBuilder sbuf, long utflen)
|
|
3128 |
throws IOException
|
|
3129 |
{
|
|
3130 |
int b1, b2, b3;
|
|
3131 |
b1 = readByte() & 0xFF;
|
|
3132 |
switch (b1 >> 4) {
|
|
3133 |
case 0:
|
|
3134 |
case 1:
|
|
3135 |
case 2:
|
|
3136 |
case 3:
|
|
3137 |
case 4:
|
|
3138 |
case 5:
|
|
3139 |
case 6:
|
|
3140 |
case 7: // 1 byte format: 0xxxxxxx
|
|
3141 |
sbuf.append((char) b1);
|
|
3142 |
return 1;
|
|
3143 |
|
|
3144 |
case 12:
|
|
3145 |
case 13: // 2 byte format: 110xxxxx 10xxxxxx
|
|
3146 |
if (utflen < 2) {
|
|
3147 |
throw new UTFDataFormatException();
|
|
3148 |
}
|
|
3149 |
b2 = readByte();
|
|
3150 |
if ((b2 & 0xC0) != 0x80) {
|
|
3151 |
throw new UTFDataFormatException();
|
|
3152 |
}
|
|
3153 |
sbuf.append((char) (((b1 & 0x1F) << 6) |
|
|
3154 |
((b2 & 0x3F) << 0)));
|
|
3155 |
return 2;
|
|
3156 |
|
|
3157 |
case 14: // 3 byte format: 1110xxxx 10xxxxxx 10xxxxxx
|
|
3158 |
if (utflen < 3) {
|
|
3159 |
if (utflen == 2) {
|
|
3160 |
readByte(); // consume remaining byte
|
|
3161 |
}
|
|
3162 |
throw new UTFDataFormatException();
|
|
3163 |
}
|
|
3164 |
b2 = readByte();
|
|
3165 |
b3 = readByte();
|
|
3166 |
if ((b2 & 0xC0) != 0x80 || (b3 & 0xC0) != 0x80) {
|
|
3167 |
throw new UTFDataFormatException();
|
|
3168 |
}
|
|
3169 |
sbuf.append((char) (((b1 & 0x0F) << 12) |
|
|
3170 |
((b2 & 0x3F) << 6) |
|
|
3171 |
((b3 & 0x3F) << 0)));
|
|
3172 |
return 3;
|
|
3173 |
|
|
3174 |
default: // 10xx xxxx, 1111 xxxx
|
|
3175 |
throw new UTFDataFormatException();
|
|
3176 |
}
|
|
3177 |
}
|
|
3178 |
}
|
|
3179 |
|
|
3180 |
/**
|
|
3181 |
* Unsynchronized table which tracks wire handle to object mappings, as
|
|
3182 |
* well as ClassNotFoundExceptions associated with deserialized objects.
|
|
3183 |
* This class implements an exception-propagation algorithm for
|
|
3184 |
* determining which objects should have ClassNotFoundExceptions associated
|
|
3185 |
* with them, taking into account cycles and discontinuities (e.g., skipped
|
|
3186 |
* fields) in the object graph.
|
|
3187 |
*
|
|
3188 |
* <p>General use of the table is as follows: during deserialization, a
|
|
3189 |
* given object is first assigned a handle by calling the assign method.
|
|
3190 |
* This method leaves the assigned handle in an "open" state, wherein
|
|
3191 |
* dependencies on the exception status of other handles can be registered
|
|
3192 |
* by calling the markDependency method, or an exception can be directly
|
|
3193 |
* associated with the handle by calling markException. When a handle is
|
|
3194 |
* tagged with an exception, the HandleTable assumes responsibility for
|
|
3195 |
* propagating the exception to any other objects which depend
|
|
3196 |
* (transitively) on the exception-tagged object.
|
|
3197 |
*
|
|
3198 |
* <p>Once all exception information/dependencies for the handle have been
|
|
3199 |
* registered, the handle should be "closed" by calling the finish method
|
|
3200 |
* on it. The act of finishing a handle allows the exception propagation
|
|
3201 |
* algorithm to aggressively prune dependency links, lessening the
|
|
3202 |
* performance/memory impact of exception tracking.
|
|
3203 |
*
|
|
3204 |
* <p>Note that the exception propagation algorithm used depends on handles
|
|
3205 |
* being assigned/finished in LIFO order; however, for simplicity as well
|
|
3206 |
* as memory conservation, it does not enforce this constraint.
|
|
3207 |
*/
|
|
3208 |
// REMIND: add full description of exception propagation algorithm?
|
|
3209 |
private static class HandleTable {
|
|
3210 |
|
|
3211 |
/* status codes indicating whether object has associated exception */
|
|
3212 |
private static final byte STATUS_OK = 1;
|
|
3213 |
private static final byte STATUS_UNKNOWN = 2;
|
|
3214 |
private static final byte STATUS_EXCEPTION = 3;
|
|
3215 |
|
|
3216 |
/** array mapping handle -> object status */
|
|
3217 |
byte[] status;
|
|
3218 |
/** array mapping handle -> object/exception (depending on status) */
|
|
3219 |
Object[] entries;
|
|
3220 |
/** array mapping handle -> list of dependent handles (if any) */
|
|
3221 |
HandleList[] deps;
|
|
3222 |
/** lowest unresolved dependency */
|
|
3223 |
int lowDep = -1;
|
|
3224 |
/** number of handles in table */
|
|
3225 |
int size = 0;
|
|
3226 |
|
|
3227 |
/**
|
|
3228 |
* Creates handle table with the given initial capacity.
|
|
3229 |
*/
|
|
3230 |
HandleTable(int initialCapacity) {
|
|
3231 |
status = new byte[initialCapacity];
|
|
3232 |
entries = new Object[initialCapacity];
|
|
3233 |
deps = new HandleList[initialCapacity];
|
|
3234 |
}
|
|
3235 |
|
|
3236 |
/**
|
|
3237 |
* Assigns next available handle to given object, and returns assigned
|
|
3238 |
* handle. Once object has been completely deserialized (and all
|
|
3239 |
* dependencies on other objects identified), the handle should be
|
|
3240 |
* "closed" by passing it to finish().
|
|
3241 |
*/
|
|
3242 |
int assign(Object obj) {
|
|
3243 |
if (size >= entries.length) {
|
|
3244 |
grow();
|
|
3245 |
}
|
|
3246 |
status[size] = STATUS_UNKNOWN;
|
|
3247 |
entries[size] = obj;
|
|
3248 |
return size++;
|
|
3249 |
}
|
|
3250 |
|
|
3251 |
/**
|
|
3252 |
* Registers a dependency (in exception status) of one handle on
|
|
3253 |
* another. The dependent handle must be "open" (i.e., assigned, but
|
|
3254 |
* not finished yet). No action is taken if either dependent or target
|
|
3255 |
* handle is NULL_HANDLE.
|
|
3256 |
*/
|
|
3257 |
void markDependency(int dependent, int target) {
|
|
3258 |
if (dependent == NULL_HANDLE || target == NULL_HANDLE) {
|
|
3259 |
return;
|
|
3260 |
}
|
|
3261 |
switch (status[dependent]) {
|
|
3262 |
|
|
3263 |
case STATUS_UNKNOWN:
|
|
3264 |
switch (status[target]) {
|
|
3265 |
case STATUS_OK:
|
|
3266 |
// ignore dependencies on objs with no exception
|
|
3267 |
break;
|
|
3268 |
|
|
3269 |
case STATUS_EXCEPTION:
|
|
3270 |
// eagerly propagate exception
|
|
3271 |
markException(dependent,
|
|
3272 |
(ClassNotFoundException) entries[target]);
|
|
3273 |
break;
|
|
3274 |
|
|
3275 |
case STATUS_UNKNOWN:
|
|
3276 |
// add to dependency list of target
|
|
3277 |
if (deps[target] == null) {
|
|
3278 |
deps[target] = new HandleList();
|
|
3279 |
}
|
|
3280 |
deps[target].add(dependent);
|
|
3281 |
|
|
3282 |
// remember lowest unresolved target seen
|
|
3283 |
if (lowDep < 0 || lowDep > target) {
|
|
3284 |
lowDep = target;
|
|
3285 |
}
|
|
3286 |
break;
|
|
3287 |
|
|
3288 |
default:
|
|
3289 |
throw new InternalError();
|
|
3290 |
}
|
|
3291 |
break;
|
|
3292 |
|
|
3293 |
case STATUS_EXCEPTION:
|
|
3294 |
break;
|
|
3295 |
|
|
3296 |
default:
|
|
3297 |
throw new InternalError();
|
|
3298 |
}
|
|
3299 |
}
|
|
3300 |
|
|
3301 |
/**
|
|
3302 |
* Associates a ClassNotFoundException (if one not already associated)
|
|
3303 |
* with the currently active handle and propagates it to other
|
|
3304 |
* referencing objects as appropriate. The specified handle must be
|
|
3305 |
* "open" (i.e., assigned, but not finished yet).
|
|
3306 |
*/
|
|
3307 |
void markException(int handle, ClassNotFoundException ex) {
|
|
3308 |
switch (status[handle]) {
|
|
3309 |
case STATUS_UNKNOWN:
|
|
3310 |
status[handle] = STATUS_EXCEPTION;
|
|
3311 |
entries[handle] = ex;
|
|
3312 |
|
|
3313 |
// propagate exception to dependents
|
|
3314 |
HandleList dlist = deps[handle];
|
|
3315 |
if (dlist != null) {
|
|
3316 |
int ndeps = dlist.size();
|
|
3317 |
for (int i = 0; i < ndeps; i++) {
|
|
3318 |
markException(dlist.get(i), ex);
|
|
3319 |
}
|
|
3320 |
deps[handle] = null;
|
|
3321 |
}
|
|
3322 |
break;
|
|
3323 |
|
|
3324 |
case STATUS_EXCEPTION:
|
|
3325 |
break;
|
|
3326 |
|
|
3327 |
default:
|
|
3328 |
throw new InternalError();
|
|
3329 |
}
|
|
3330 |
}
|
|
3331 |
|
|
3332 |
/**
|
|
3333 |
* Marks given handle as finished, meaning that no new dependencies
|
|
3334 |
* will be marked for handle. Calls to the assign and finish methods
|
|
3335 |
* must occur in LIFO order.
|
|
3336 |
*/
|
|
3337 |
void finish(int handle) {
|
|
3338 |
int end;
|
|
3339 |
if (lowDep < 0) {
|
|
3340 |
// no pending unknowns, only resolve current handle
|
|
3341 |
end = handle + 1;
|
|
3342 |
} else if (lowDep >= handle) {
|
|
3343 |
// pending unknowns now clearable, resolve all upward handles
|
|
3344 |
end = size;
|
|
3345 |
lowDep = -1;
|
|
3346 |
} else {
|
|
3347 |
// unresolved backrefs present, can't resolve anything yet
|
|
3348 |
return;
|
|
3349 |
}
|
|
3350 |
|
|
3351 |
// change STATUS_UNKNOWN -> STATUS_OK in selected span of handles
|
|
3352 |
for (int i = handle; i < end; i++) {
|
|
3353 |
switch (status[i]) {
|
|
3354 |
case STATUS_UNKNOWN:
|
|
3355 |
status[i] = STATUS_OK;
|
|
3356 |
deps[i] = null;
|
|
3357 |
break;
|
|
3358 |
|
|
3359 |
case STATUS_OK:
|
|
3360 |
case STATUS_EXCEPTION:
|
|
3361 |
break;
|
|
3362 |
|
|
3363 |
default:
|
|
3364 |
throw new InternalError();
|
|
3365 |
}
|
|
3366 |
}
|
|
3367 |
}
|
|
3368 |
|
|
3369 |
/**
|
|
3370 |
* Assigns a new object to the given handle. The object previously
|
|
3371 |
* associated with the handle is forgotten. This method has no effect
|
|
3372 |
* if the given handle already has an exception associated with it.
|
|
3373 |
* This method may be called at any time after the handle is assigned.
|
|
3374 |
*/
|
|
3375 |
void setObject(int handle, Object obj) {
|
|
3376 |
switch (status[handle]) {
|
|
3377 |
case STATUS_UNKNOWN:
|
|
3378 |
case STATUS_OK:
|
|
3379 |
entries[handle] = obj;
|
|
3380 |
break;
|
|
3381 |
|
|
3382 |
case STATUS_EXCEPTION:
|
|
3383 |
break;
|
|
3384 |
|
|
3385 |
default:
|
|
3386 |
throw new InternalError();
|
|
3387 |
}
|
|
3388 |
}
|
|
3389 |
|
|
3390 |
/**
|
|
3391 |
* Looks up and returns object associated with the given handle.
|
|
3392 |
* Returns null if the given handle is NULL_HANDLE, or if it has an
|
|
3393 |
* associated ClassNotFoundException.
|
|
3394 |
*/
|
|
3395 |
Object lookupObject(int handle) {
|
|
3396 |
return (handle != NULL_HANDLE &&
|
|
3397 |
status[handle] != STATUS_EXCEPTION) ?
|
|
3398 |
entries[handle] : null;
|
|
3399 |
}
|
|
3400 |
|
|
3401 |
/**
|
|
3402 |
* Looks up and returns ClassNotFoundException associated with the
|
|
3403 |
* given handle. Returns null if the given handle is NULL_HANDLE, or
|
|
3404 |
* if there is no ClassNotFoundException associated with the handle.
|
|
3405 |
*/
|
|
3406 |
ClassNotFoundException lookupException(int handle) {
|
|
3407 |
return (handle != NULL_HANDLE &&
|
|
3408 |
status[handle] == STATUS_EXCEPTION) ?
|
|
3409 |
(ClassNotFoundException) entries[handle] : null;
|
|
3410 |
}
|
|
3411 |
|
|
3412 |
/**
|
|
3413 |
* Resets table to its initial state.
|
|
3414 |
*/
|
|
3415 |
void clear() {
|
|
3416 |
Arrays.fill(status, 0, size, (byte) 0);
|
|
3417 |
Arrays.fill(entries, 0, size, null);
|
|
3418 |
Arrays.fill(deps, 0, size, null);
|
|
3419 |
lowDep = -1;
|
|
3420 |
size = 0;
|
|
3421 |
}
|
|
3422 |
|
|
3423 |
/**
|
|
3424 |
* Returns number of handles registered in table.
|
|
3425 |
*/
|
|
3426 |
int size() {
|
|
3427 |
return size;
|
|
3428 |
}
|
|
3429 |
|
|
3430 |
/**
|
|
3431 |
* Expands capacity of internal arrays.
|
|
3432 |
*/
|
|
3433 |
private void grow() {
|
|
3434 |
int newCapacity = (entries.length << 1) + 1;
|
|
3435 |
|
|
3436 |
byte[] newStatus = new byte[newCapacity];
|
|
3437 |
Object[] newEntries = new Object[newCapacity];
|
|
3438 |
HandleList[] newDeps = new HandleList[newCapacity];
|
|
3439 |
|
|
3440 |
System.arraycopy(status, 0, newStatus, 0, size);
|
|
3441 |
System.arraycopy(entries, 0, newEntries, 0, size);
|
|
3442 |
System.arraycopy(deps, 0, newDeps, 0, size);
|
|
3443 |
|
|
3444 |
status = newStatus;
|
|
3445 |
entries = newEntries;
|
|
3446 |
deps = newDeps;
|
|
3447 |
}
|
|
3448 |
|
|
3449 |
/**
|
|
3450 |
* Simple growable list of (integer) handles.
|
|
3451 |
*/
|
|
3452 |
private static class HandleList {
|
|
3453 |
private int[] list = new int[4];
|
|
3454 |
private int size = 0;
|
|
3455 |
|
|
3456 |
public HandleList() {
|
|
3457 |
}
|
|
3458 |
|
|
3459 |
public void add(int handle) {
|
|
3460 |
if (size >= list.length) {
|
|
3461 |
int[] newList = new int[list.length << 1];
|
|
3462 |
System.arraycopy(list, 0, newList, 0, list.length);
|
|
3463 |
list = newList;
|
|
3464 |
}
|
|
3465 |
list[size++] = handle;
|
|
3466 |
}
|
|
3467 |
|
|
3468 |
public int get(int index) {
|
|
3469 |
if (index >= size) {
|
|
3470 |
throw new ArrayIndexOutOfBoundsException();
|
|
3471 |
}
|
|
3472 |
return list[index];
|
|
3473 |
}
|
|
3474 |
|
|
3475 |
public int size() {
|
|
3476 |
return size;
|
|
3477 |
}
|
|
3478 |
}
|
|
3479 |
}
|
|
3480 |
|
|
3481 |
/**
|
|
3482 |
* Method for cloning arrays in case of using unsharing reading
|
|
3483 |
*/
|
|
3484 |
private static Object cloneArray(Object array) {
|
|
3485 |
if (array instanceof Object[]) {
|
|
3486 |
return ((Object[]) array).clone();
|
|
3487 |
} else if (array instanceof boolean[]) {
|
|
3488 |
return ((boolean[]) array).clone();
|
|
3489 |
} else if (array instanceof byte[]) {
|
|
3490 |
return ((byte[]) array).clone();
|
|
3491 |
} else if (array instanceof char[]) {
|
|
3492 |
return ((char[]) array).clone();
|
|
3493 |
} else if (array instanceof double[]) {
|
|
3494 |
return ((double[]) array).clone();
|
|
3495 |
} else if (array instanceof float[]) {
|
|
3496 |
return ((float[]) array).clone();
|
|
3497 |
} else if (array instanceof int[]) {
|
|
3498 |
return ((int[]) array).clone();
|
|
3499 |
} else if (array instanceof long[]) {
|
|
3500 |
return ((long[]) array).clone();
|
|
3501 |
} else if (array instanceof double[]) {
|
|
3502 |
return ((double[]) array).clone();
|
|
3503 |
} else {
|
|
3504 |
throw new AssertionError();
|
|
3505 |
}
|
|
3506 |
}
|
|
3507 |
|
|
3508 |
/**
|
|
3509 |
* Context that during upcalls to class-defined readObject methods; holds
|
|
3510 |
* object currently being deserialized and descriptor for current class.
|
|
3511 |
* This context keeps a boolean state to indicate that defaultReadObject
|
|
3512 |
* or readFields has already been invoked with this context or the class's
|
|
3513 |
* readObject method has returned; if true, the getObj method throws
|
|
3514 |
* NotActiveException.
|
|
3515 |
*/
|
|
3516 |
private static class CallbackContext {
|
|
3517 |
private final Object obj;
|
|
3518 |
private final ObjectStreamClass desc;
|
|
3519 |
private final AtomicBoolean used = new AtomicBoolean();
|
|
3520 |
|
|
3521 |
public CallbackContext(Object obj, ObjectStreamClass desc) {
|
|
3522 |
this.obj = obj;
|
|
3523 |
this.desc = desc;
|
|
3524 |
}
|
|
3525 |
|
|
3526 |
public Object getObj() throws NotActiveException {
|
|
3527 |
checkAndSetUsed();
|
|
3528 |
return obj;
|
|
3529 |
}
|
|
3530 |
|
|
3531 |
public ObjectStreamClass getDesc() {
|
|
3532 |
return desc;
|
|
3533 |
}
|
|
3534 |
|
|
3535 |
private void checkAndSetUsed() throws NotActiveException {
|
|
3536 |
if (!used.compareAndSet(false, true)) {
|
|
3537 |
throw new NotActiveException(
|
|
3538 |
"not in readObject invocation or fields already read");
|
|
3539 |
}
|
|
3540 |
}
|
|
3541 |
|
|
3542 |
public void setUsed() {
|
|
3543 |
used.set(true);
|
|
3544 |
}
|
|
3545 |
}
|
|
3546 |
}
|