author | tbell |
Mon, 20 Apr 2009 00:12:19 -0700 | |
changeset 2664 | a0a22a8f16bd |
parent 4 | 02bb8761fcce |
child 3291 | 805a72a26925 |
permissions | -rw-r--r-- |
4 | 1 |
/* |
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* Copyright 1998-2008 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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/* |
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* Licensed Materials - Property of IBM |
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* RMI-IIOP v1.0 |
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* Copyright IBM Corp. 1998 1999 All Rights Reserved |
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* |
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*/ |
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package com.sun.corba.se.impl.io; |
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import java.security.MessageDigest; |
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import java.security.NoSuchAlgorithmException; |
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import java.security.DigestOutputStream; |
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import java.security.AccessController; |
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import java.security.PrivilegedExceptionAction; |
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import java.security.PrivilegedActionException; |
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import java.security.PrivilegedAction; |
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import java.lang.reflect.Modifier; |
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import java.lang.reflect.Array; |
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import java.lang.reflect.Field; |
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import java.lang.reflect.Member; |
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import java.lang.reflect.Method; |
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import java.lang.reflect.Constructor; |
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import java.lang.reflect.Proxy; |
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import java.lang.reflect.InvocationTargetException; |
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import java.io.IOException; |
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import java.io.DataOutputStream; |
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import java.io.ByteArrayOutputStream; |
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import java.io.InvalidClassException; |
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import java.io.Serializable; |
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import java.util.Arrays; |
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import java.util.Comparator; |
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import java.util.Hashtable; |
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import com.sun.corba.se.impl.util.RepositoryId; |
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import org.omg.CORBA.ValueMember; |
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import sun.corba.Bridge; |
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/** |
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* A ObjectStreamClass describes a class that can be serialized to a stream |
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* or a class that was serialized to a stream. It contains the name |
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* and the serialVersionUID of the class. |
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* <br> |
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* The ObjectStreamClass for a specific class loaded in this Java VM can |
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* be found using the lookup method. |
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* |
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* @author Roger Riggs |
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* @since JDK1.1 |
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*/ |
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public class ObjectStreamClass implements java.io.Serializable { |
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private static final boolean DEBUG_SVUID = false ; |
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public static final long kDefaultUID = -1; |
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private static Object noArgsList[] = {}; |
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private static Class noTypesList[] = {}; |
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private static Hashtable translatedFields; |
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private static final Bridge bridge = |
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(Bridge)AccessController.doPrivileged( |
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new PrivilegedAction() { |
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public Object run() { |
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return Bridge.get() ; |
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} |
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} |
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) ; |
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/** Find the descriptor for a class that can be serialized. Null |
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* is returned if the specified class does not implement |
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* java.io.Serializable or java.io.Externalizable. |
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*/ |
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static final ObjectStreamClass lookup(Class cl) |
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{ |
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ObjectStreamClass desc = lookupInternal(cl); |
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if (desc.isSerializable() || desc.isExternalizable()) |
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return desc; |
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return null; |
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} |
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/* |
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* Find the class descriptor for the specified class. |
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* Package access only so it can be called from ObjectIn/OutStream. |
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*/ |
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static ObjectStreamClass lookupInternal(Class cl) |
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{ |
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/* Synchronize on the hashtable so no two threads will do |
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* this at the same time. |
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*/ |
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ObjectStreamClass desc = null; |
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synchronized (descriptorFor) { |
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/* Find the matching descriptor if it already known */ |
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desc = findDescriptorFor(cl); |
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if (desc == null) { |
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/* Check if it's serializable */ |
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boolean serializable = classSerializable.isAssignableFrom(cl); |
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/* If the class is only Serializable, |
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* lookup the descriptor for the superclass. |
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*/ |
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ObjectStreamClass superdesc = null; |
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if (serializable) { |
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Class superclass = cl.getSuperclass(); |
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if (superclass != null) |
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superdesc = lookup(superclass); |
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} |
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/* Check if its' externalizable. |
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* If it's Externalizable, clear the serializable flag. |
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* Only one or the other may be set in the protocol. |
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*/ |
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boolean externalizable = false; |
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if (serializable) { |
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externalizable = |
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((superdesc != null) && superdesc.isExternalizable()) || |
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classExternalizable.isAssignableFrom(cl); |
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if (externalizable) { |
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serializable = false; |
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} |
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} |
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/* Create a new version descriptor, |
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* it put itself in the known table. |
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*/ |
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desc = new ObjectStreamClass(cl, superdesc, |
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serializable, externalizable); |
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} |
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// Must always call init. See bug 4488137. This code was |
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// incorrectly changed to return immediately on a non-null |
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// cache result. That allowed threads to gain access to |
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// unintialized instances. |
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// |
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// History: Note, the following init() call was originally within |
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// the synchronization block, as it currently is now. Later, the |
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// init() call was moved outside the synchronization block, and |
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// the init() method used a private member variable lock, to |
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// avoid performance problems. See bug 4165204. But that lead to |
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// a deadlock situation, see bug 5104239. Hence, the init() method |
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// has now been moved back into the synchronization block. The |
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// right approach to solving these problems would be to rewrite |
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// this class, based on the latest java.io.ObjectStreamClass. |
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desc.init(); |
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} |
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return desc; |
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} |
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/** |
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* The name of the class described by this descriptor. |
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*/ |
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public final String getName() { |
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return name; |
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} |
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/** |
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* Return the serialVersionUID for this class. |
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* The serialVersionUID defines a set of classes all with the same name |
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* that have evolved from a common root class and agree to be serialized |
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* and deserialized using a common format. |
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*/ |
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public static final long getSerialVersionUID( java.lang.Class clazz) { |
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ObjectStreamClass theosc = ObjectStreamClass.lookup( clazz ); |
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if( theosc != null ) |
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{ |
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return theosc.getSerialVersionUID( ); |
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} |
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return 0; |
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} |
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/** |
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* Return the serialVersionUID for this class. |
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* The serialVersionUID defines a set of classes all with the same name |
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* that have evolved from a common root class and agree to be serialized |
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* and deserialized using a common format. |
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*/ |
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public final long getSerialVersionUID() { |
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return suid; |
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} |
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/** |
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* Return the serialVersionUID string for this class. |
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* The serialVersionUID defines a set of classes all with the same name |
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* that have evolved from a common root class and agree to be serialized |
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* and deserialized using a common format. |
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*/ |
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public final String getSerialVersionUIDStr() { |
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if (suidStr == null) |
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suidStr = Long.toHexString(suid).toUpperCase(); |
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return suidStr; |
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} |
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/** |
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* Return the actual (computed) serialVersionUID for this class. |
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*/ |
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public static final long getActualSerialVersionUID( java.lang.Class clazz ) |
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{ |
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ObjectStreamClass theosc = ObjectStreamClass.lookup( clazz ); |
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if( theosc != null ) |
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{ |
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return theosc.getActualSerialVersionUID( ); |
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} |
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return 0; |
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} |
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/** |
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* Return the actual (computed) serialVersionUID for this class. |
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*/ |
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public final long getActualSerialVersionUID() { |
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return actualSuid; |
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} |
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/** |
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* Return the actual (computed) serialVersionUID for this class. |
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*/ |
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242 |
public final String getActualSerialVersionUIDStr() { |
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if (actualSuidStr == null) |
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actualSuidStr = Long.toHexString(actualSuid).toUpperCase(); |
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return actualSuidStr; |
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} |
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247 |
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248 |
/** |
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* Return the class in the local VM that this version is mapped to. |
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250 |
* Null is returned if there is no corresponding local class. |
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*/ |
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252 |
public final Class forClass() { |
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return ofClass; |
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} |
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255 |
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256 |
/** |
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* Return an array of the fields of this serializable class. |
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258 |
* @return an array containing an element for each persistent |
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* field of this class. Returns an array of length zero if |
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* there are no fields. |
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* @since JDK1.2 |
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262 |
*/ |
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263 |
public ObjectStreamField[] getFields() { |
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// Return a copy so the caller can't change the fields. |
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265 |
if (fields.length > 0) { |
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ObjectStreamField[] dup = new ObjectStreamField[fields.length]; |
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267 |
System.arraycopy(fields, 0, dup, 0, fields.length); |
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return dup; |
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269 |
} else { |
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270 |
return fields; |
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271 |
} |
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272 |
} |
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273 |
||
274 |
public boolean hasField(ValueMember field) |
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275 |
{ |
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276 |
try { |
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277 |
for (int i = 0; i < fields.length; i++) { |
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278 |
if (fields[i].getName().equals(field.name)) { |
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279 |
if (fields[i].getSignature().equals( |
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280 |
ValueUtility.getSignature(field))) |
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281 |
return true; |
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282 |
} |
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283 |
} |
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284 |
} catch (Exception exc) { |
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285 |
// Ignore this; all we want to do is return false |
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286 |
// Note that ValueUtility.getSignature can throw checked exceptions. |
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287 |
} |
|
288 |
||
289 |
return false; |
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290 |
} |
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291 |
||
292 |
/* Avoid unnecessary allocations. */ |
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293 |
final ObjectStreamField[] getFieldsNoCopy() { |
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294 |
return fields; |
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295 |
} |
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296 |
||
297 |
/** |
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298 |
* Get the field of this class by name. |
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299 |
* @return The ObjectStreamField object of the named field or null if there |
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300 |
* is no such named field. |
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301 |
*/ |
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302 |
public final ObjectStreamField getField(String name) { |
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303 |
/* Binary search of fields by name. |
|
304 |
*/ |
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305 |
for (int i = fields.length-1; i >= 0; i--) { |
|
306 |
if (name.equals(fields[i].getName())) { |
|
307 |
return fields[i]; |
|
308 |
} |
|
309 |
} |
|
310 |
return null; |
|
311 |
} |
|
312 |
||
313 |
public Serializable writeReplace(Serializable value) { |
|
314 |
if (writeReplaceObjectMethod != null) { |
|
315 |
try { |
|
316 |
return (Serializable) writeReplaceObjectMethod.invoke(value,noArgsList); |
|
317 |
} catch(Throwable t) { |
|
318 |
throw new RuntimeException(t); |
|
319 |
} |
|
320 |
} |
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321 |
else return value; |
|
322 |
} |
|
323 |
||
324 |
public Object readResolve(Object value) { |
|
325 |
if (readResolveObjectMethod != null) { |
|
326 |
try { |
|
327 |
return readResolveObjectMethod.invoke(value,noArgsList); |
|
328 |
} catch(Throwable t) { |
|
329 |
throw new RuntimeException(t); |
|
330 |
} |
|
331 |
} |
|
332 |
else return value; |
|
333 |
} |
|
334 |
||
335 |
/** |
|
336 |
* Return a string describing this ObjectStreamClass. |
|
337 |
*/ |
|
338 |
public final String toString() { |
|
339 |
StringBuffer sb = new StringBuffer(); |
|
340 |
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341 |
sb.append(name); |
|
342 |
sb.append(": static final long serialVersionUID = "); |
|
343 |
sb.append(Long.toString(suid)); |
|
344 |
sb.append("L;"); |
|
345 |
return sb.toString(); |
|
346 |
} |
|
347 |
||
348 |
/* |
|
349 |
* Create a new ObjectStreamClass from a loaded class. |
|
350 |
* Don't call this directly, call lookup instead. |
|
351 |
*/ |
|
352 |
private ObjectStreamClass(java.lang.Class cl, ObjectStreamClass superdesc, |
|
353 |
boolean serial, boolean extern) |
|
354 |
{ |
|
355 |
ofClass = cl; /* created from this class */ |
|
356 |
||
357 |
if (Proxy.isProxyClass(cl)) { |
|
358 |
forProxyClass = true; |
|
359 |
} |
|
360 |
||
361 |
name = cl.getName(); |
|
362 |
superclass = superdesc; |
|
363 |
serializable = serial; |
|
364 |
if (!forProxyClass) { |
|
365 |
// proxy classes are never externalizable |
|
366 |
externalizable = extern; |
|
367 |
} |
|
368 |
||
369 |
/* |
|
370 |
* Enter this class in the table of known descriptors. |
|
371 |
* Otherwise, when the fields are read it may recurse |
|
372 |
* trying to find the descriptor for itself. |
|
373 |
*/ |
|
374 |
insertDescriptorFor(this); |
|
375 |
||
376 |
/* |
|
377 |
* The remainder of initialization occurs in init(), which is called |
|
378 |
* after the lock on the global class descriptor table has been |
|
379 |
* released. |
|
380 |
*/ |
|
381 |
} |
|
382 |
||
383 |
/* |
|
384 |
* Initialize class descriptor. This method is only invoked on class |
|
385 |
* descriptors created via calls to lookupInternal(). This method is kept |
|
386 |
* separate from the ObjectStreamClass constructor so that lookupInternal |
|
387 |
* does not have to hold onto a global class descriptor table lock while the |
|
388 |
* class descriptor is being initialized (see bug 4165204). |
|
389 |
*/ |
|
390 |
||
391 |
||
392 |
private void init() { |
|
393 |
synchronized (lock) { |
|
394 |
||
395 |
// See description at definition of initialized. |
|
396 |
if (initialized) |
|
397 |
return; |
|
398 |
||
399 |
final Class cl = ofClass; |
|
400 |
||
401 |
if (!serializable || |
|
402 |
externalizable || |
|
403 |
forProxyClass || |
|
404 |
name.equals("java.lang.String")) { |
|
405 |
fields = NO_FIELDS; |
|
406 |
} else if (serializable) { |
|
407 |
/* Ask for permission to override field access checks. |
|
408 |
*/ |
|
409 |
AccessController.doPrivileged(new PrivilegedAction() { |
|
410 |
public Object run() { |
|
411 |
/* Fill in the list of persistent fields. |
|
412 |
* If it is declared, use the declared serialPersistentFields. |
|
413 |
* Otherwise, extract the fields from the class itself. |
|
414 |
*/ |
|
415 |
try { |
|
416 |
Field pf = cl.getDeclaredField("serialPersistentFields"); |
|
417 |
// serial bug 7; the serialPersistentFields were not |
|
418 |
// being read and stored as Accessible bit was not set |
|
419 |
pf.setAccessible(true); |
|
420 |
// serial bug 7; need to find if the field is of type |
|
421 |
// java.io.ObjectStreamField |
|
422 |
java.io.ObjectStreamField[] f = |
|
423 |
(java.io.ObjectStreamField[])pf.get(cl); |
|
424 |
int mods = pf.getModifiers(); |
|
425 |
if ((Modifier.isPrivate(mods)) && |
|
426 |
(Modifier.isStatic(mods)) && |
|
427 |
(Modifier.isFinal(mods))) |
|
428 |
{ |
|
429 |
fields = (ObjectStreamField[])translateFields((Object[])pf.get(cl)); |
|
430 |
} |
|
431 |
} catch (NoSuchFieldException e) { |
|
432 |
fields = null; |
|
433 |
} catch (IllegalAccessException e) { |
|
434 |
fields = null; |
|
435 |
} catch (IllegalArgumentException e) { |
|
436 |
fields = null; |
|
437 |
} catch (ClassCastException e) { |
|
438 |
/* Thrown if a field serialPersistentField exists |
|
439 |
* but it is not of type ObjectStreamField. |
|
440 |
*/ |
|
441 |
fields = null; |
|
442 |
} |
|
443 |
||
444 |
||
445 |
if (fields == null) { |
|
446 |
/* Get all of the declared fields for this |
|
447 |
* Class. setAccessible on all fields so they |
|
448 |
* can be accessed later. Create a temporary |
|
449 |
* ObjectStreamField array to hold each |
|
450 |
* non-static, non-transient field. Then copy the |
|
451 |
* temporary array into an array of the correct |
|
452 |
* size once the number of fields is known. |
|
453 |
*/ |
|
454 |
Field[] actualfields = cl.getDeclaredFields(); |
|
455 |
||
456 |
int numFields = 0; |
|
457 |
ObjectStreamField[] tempFields = |
|
458 |
new ObjectStreamField[actualfields.length]; |
|
459 |
for (int i = 0; i < actualfields.length; i++) { |
|
460 |
Field fld = actualfields[i] ; |
|
461 |
int modifiers = fld.getModifiers(); |
|
462 |
if (!Modifier.isStatic(modifiers) && |
|
463 |
!Modifier.isTransient(modifiers)) { |
|
464 |
fld.setAccessible(true) ; |
|
465 |
tempFields[numFields++] = new ObjectStreamField(fld); |
|
466 |
} |
|
467 |
} |
|
468 |
||
469 |
fields = new ObjectStreamField[numFields]; |
|
470 |
System.arraycopy(tempFields, 0, fields, 0, numFields); |
|
471 |
||
472 |
} else { |
|
473 |
// For each declared persistent field, look for an actual |
|
474 |
// reflected Field. If there is one, make sure it's the correct |
|
475 |
// type and cache it in the ObjectStreamClass for that field. |
|
476 |
for (int j = fields.length-1; j >= 0; j--) { |
|
477 |
try { |
|
478 |
Field reflField = cl.getDeclaredField(fields[j].getName()); |
|
479 |
if (fields[j].getType() == reflField.getType()) { |
|
480 |
reflField.setAccessible(true); |
|
481 |
fields[j].setField(reflField); |
|
482 |
} |
|
483 |
} catch (NoSuchFieldException e) { |
|
484 |
// Nothing to do |
|
485 |
} |
|
486 |
} |
|
487 |
} |
|
488 |
return null; |
|
489 |
} |
|
490 |
}); |
|
491 |
||
492 |
if (fields.length > 1) |
|
493 |
Arrays.sort(fields); |
|
494 |
||
495 |
/* Set up field data for use while writing using the API api. */ |
|
496 |
computeFieldInfo(); |
|
497 |
} |
|
498 |
||
499 |
/* Get the serialVersionUID from the class. |
|
500 |
* It uses the access override mechanism so make sure |
|
501 |
* the field objects is only used here. |
|
502 |
* |
|
503 |
* NonSerializable classes have a serialVerisonUID of 0L. |
|
504 |
*/ |
|
505 |
if (isNonSerializable()) { |
|
506 |
suid = 0L; |
|
507 |
} else { |
|
508 |
// Lookup special Serializable members using reflection. |
|
509 |
AccessController.doPrivileged(new PrivilegedAction() { |
|
510 |
public Object run() { |
|
511 |
if (forProxyClass) { |
|
512 |
// proxy classes always have serialVersionUID of 0L |
|
513 |
suid = 0L; |
|
514 |
} else { |
|
515 |
try { |
|
516 |
final Field f = cl.getDeclaredField("serialVersionUID"); |
|
517 |
int mods = f.getModifiers(); |
|
518 |
// SerialBug 5: static final SUID should be read |
|
519 |
if (Modifier.isStatic(mods) && Modifier.isFinal(mods) ) { |
|
520 |
f.setAccessible(true); |
|
521 |
suid = f.getLong(cl); |
|
522 |
// SerialBug 2: should be computed after writeObject |
|
523 |
// actualSuid = computeStructuralUID(cl); |
|
524 |
} else { |
|
525 |
suid = _computeSerialVersionUID(cl); |
|
526 |
// SerialBug 2: should be computed after writeObject |
|
527 |
// actualSuid = computeStructuralUID(cl); |
|
528 |
} |
|
529 |
} catch (NoSuchFieldException ex) { |
|
530 |
suid = _computeSerialVersionUID(cl); |
|
531 |
// SerialBug 2: should be computed after writeObject |
|
532 |
// actualSuid = computeStructuralUID(cl); |
|
533 |
} catch (IllegalAccessException ex) { |
|
534 |
suid = _computeSerialVersionUID(cl); |
|
535 |
} |
|
536 |
} |
|
537 |
||
538 |
writeReplaceObjectMethod = ObjectStreamClass.getInheritableMethod(cl, |
|
539 |
"writeReplace", noTypesList, Object.class); |
|
540 |
||
541 |
readResolveObjectMethod = ObjectStreamClass.getInheritableMethod(cl, |
|
542 |
"readResolve", noTypesList, Object.class); |
|
543 |
||
544 |
if (externalizable) |
|
545 |
cons = getExternalizableConstructor(cl) ; |
|
546 |
else |
|
547 |
cons = getSerializableConstructor(cl) ; |
|
548 |
||
549 |
if (serializable && !forProxyClass) { |
|
550 |
/* Look for the writeObject method |
|
551 |
* Set the accessible flag on it here. ObjectOutputStream |
|
552 |
* will call it as necessary. |
|
553 |
*/ |
|
554 |
writeObjectMethod = getPrivateMethod( cl, "writeObject", |
|
555 |
new Class[] { java.io.ObjectOutputStream.class }, Void.TYPE ) ; |
|
556 |
readObjectMethod = getPrivateMethod( cl, "readObject", |
|
557 |
new Class[] { java.io.ObjectInputStream.class }, Void.TYPE ) ; |
|
558 |
} |
|
559 |
return null; |
|
560 |
} |
|
561 |
}); |
|
562 |
} |
|
563 |
||
564 |
// This call depends on a lot of information computed above! |
|
565 |
actualSuid = ObjectStreamClass.computeStructuralUID(this, cl); |
|
566 |
||
567 |
// If we have a write object method, precompute the |
|
568 |
// RMI-IIOP stream format version 2 optional data |
|
569 |
// repository ID. |
|
570 |
if (hasWriteObject()) |
|
571 |
rmiiiopOptionalDataRepId = computeRMIIIOPOptionalDataRepId(); |
|
572 |
||
573 |
// This must be done last. |
|
574 |
initialized = true; |
|
575 |
} |
|
576 |
} |
|
577 |
||
578 |
/** |
|
579 |
* Returns non-static private method with given signature defined by given |
|
580 |
* class, or null if none found. Access checks are disabled on the |
|
581 |
* returned method (if any). |
|
582 |
*/ |
|
583 |
private static Method getPrivateMethod(Class cl, String name, |
|
584 |
Class[] argTypes, |
|
585 |
Class returnType) |
|
586 |
{ |
|
587 |
try { |
|
588 |
Method meth = cl.getDeclaredMethod(name, argTypes); |
|
589 |
meth.setAccessible(true); |
|
590 |
int mods = meth.getModifiers(); |
|
591 |
return ((meth.getReturnType() == returnType) && |
|
592 |
((mods & Modifier.STATIC) == 0) && |
|
593 |
((mods & Modifier.PRIVATE) != 0)) ? meth : null; |
|
594 |
} catch (NoSuchMethodException ex) { |
|
595 |
return null; |
|
596 |
} |
|
597 |
} |
|
598 |
||
599 |
// Specific to RMI-IIOP |
|
600 |
/** |
|
601 |
* Java to IDL ptc-02-01-12 1.5.1 |
|
602 |
* |
|
603 |
* "The rep_id string passed to the start_value method must be |
|
604 |
* 'RMI:org.omg.custom.class:hashcode:suid' where class is the |
|
605 |
* fully-qualified name of the class whose writeObject method |
|
606 |
* is being invoked and hashcode and suid are the class's hashcode |
|
607 |
* and SUID." |
|
608 |
*/ |
|
609 |
private String computeRMIIIOPOptionalDataRepId() { |
|
610 |
||
611 |
StringBuffer sbuf = new StringBuffer("RMI:org.omg.custom."); |
|
612 |
sbuf.append(RepositoryId.convertToISOLatin1(this.getName())); |
|
613 |
sbuf.append(':'); |
|
614 |
sbuf.append(this.getActualSerialVersionUIDStr()); |
|
615 |
sbuf.append(':'); |
|
616 |
sbuf.append(this.getSerialVersionUIDStr()); |
|
617 |
||
618 |
return sbuf.toString(); |
|
619 |
} |
|
620 |
||
621 |
/** |
|
622 |
* This will return null if there is no writeObject method. |
|
623 |
*/ |
|
624 |
public final String getRMIIIOPOptionalDataRepId() { |
|
625 |
return rmiiiopOptionalDataRepId; |
|
626 |
} |
|
627 |
||
628 |
/* |
|
629 |
* Create an empty ObjectStreamClass for a class about to be read. |
|
630 |
* This is separate from read so ObjectInputStream can assign the |
|
631 |
* wire handle early, before any nested ObjectStreamClass might |
|
632 |
* be read. |
|
633 |
*/ |
|
634 |
ObjectStreamClass(String n, long s) { |
|
635 |
name = n; |
|
636 |
suid = s; |
|
637 |
superclass = null; |
|
638 |
} |
|
639 |
||
640 |
private static Object[] translateFields(Object objs[]) |
|
641 |
throws NoSuchFieldException { |
|
642 |
try{ |
|
643 |
java.io.ObjectStreamField fields[] = (java.io.ObjectStreamField[])objs; |
|
644 |
Object translation[] = null; |
|
645 |
||
646 |
if (translatedFields == null) |
|
647 |
translatedFields = new Hashtable(); |
|
648 |
||
649 |
translation = (Object[])translatedFields.get(fields); |
|
650 |
||
651 |
if (translation != null) |
|
652 |
return translation; |
|
653 |
else { |
|
654 |
Class osfClass = Class.forName("com.sun.corba.se.impl.io.ObjectStreamField"); |
|
655 |
translation = (Object[])java.lang.reflect.Array.newInstance(osfClass, objs.length); |
|
656 |
Object arg[] = new Object[2]; |
|
657 |
Class types[] = {String.class, Class.class}; |
|
658 |
Constructor constructor = osfClass.getDeclaredConstructor(types); |
|
659 |
for (int i = fields.length -1; i >= 0; i--){ |
|
660 |
arg[0] = fields[i].getName(); |
|
661 |
arg[1] = fields[i].getType(); |
|
662 |
||
663 |
translation[i] = constructor.newInstance(arg); |
|
664 |
} |
|
665 |
translatedFields.put(fields, translation); |
|
666 |
||
667 |
} |
|
668 |
||
669 |
return (Object[])translation; |
|
670 |
} |
|
671 |
catch(Throwable t){ |
|
672 |
NoSuchFieldException nsfe = new NoSuchFieldException(); |
|
673 |
nsfe.initCause( t ) ; |
|
674 |
throw nsfe ; |
|
675 |
} |
|
676 |
} |
|
677 |
||
678 |
/* |
|
679 |
* Set the class this version descriptor matches. |
|
680 |
* The base class name and serializable hash must match. |
|
681 |
* Fill in the reflected Fields that will be used |
|
682 |
* for reading. |
|
683 |
*/ |
|
684 |
final void setClass(Class cl) throws InvalidClassException { |
|
685 |
||
686 |
if (cl == null) { |
|
687 |
localClassDesc = null; |
|
688 |
ofClass = null; |
|
689 |
computeFieldInfo(); |
|
690 |
return; |
|
691 |
} |
|
692 |
||
693 |
localClassDesc = lookupInternal(cl); |
|
694 |
if (localClassDesc == null) |
|
695 |
// XXX I18N, logging needed |
|
696 |
throw new InvalidClassException(cl.getName(), |
|
697 |
"Local class not compatible"); |
|
698 |
if (suid != localClassDesc.suid) { |
|
699 |
||
700 |
/* Check for exceptional cases that allow mismatched suid. */ |
|
701 |
||
702 |
/* Allow adding Serializable or Externalizable |
|
703 |
* to a later release of the class. |
|
704 |
*/ |
|
705 |
boolean addedSerialOrExtern = |
|
706 |
isNonSerializable() || localClassDesc.isNonSerializable(); |
|
707 |
||
708 |
/* Disregard the serialVersionUID of an array |
|
709 |
* when name and cl.Name differ. If resolveClass() returns |
|
710 |
* an array with a different package name, |
|
711 |
* the serialVersionUIDs will not match since the fully |
|
712 |
* qualified array class is used in the |
|
713 |
* computation of the array's serialVersionUID. There is |
|
714 |
* no way to set a permanent serialVersionUID for an array type. |
|
715 |
*/ |
|
716 |
||
717 |
boolean arraySUID = (cl.isArray() && ! cl.getName().equals(name)); |
|
718 |
||
719 |
if (! arraySUID && ! addedSerialOrExtern ) { |
|
720 |
// XXX I18N, logging needed |
|
721 |
throw new InvalidClassException(cl.getName(), |
|
722 |
"Local class not compatible:" + |
|
723 |
" stream classdesc serialVersionUID=" + suid + |
|
724 |
" local class serialVersionUID=" + localClassDesc.suid); |
|
725 |
} |
|
726 |
} |
|
727 |
||
728 |
/* compare the class names, stripping off package names. */ |
|
729 |
if (! compareClassNames(name, cl.getName(), '.')) |
|
730 |
// XXX I18N, logging needed |
|
731 |
throw new InvalidClassException(cl.getName(), |
|
732 |
"Incompatible local class name. " + |
|
733 |
"Expected class name compatible with " + |
|
734 |
name); |
|
735 |
||
736 |
/* |
|
737 |
* Test that both implement either serializable or externalizable. |
|
738 |
*/ |
|
739 |
||
740 |
// The next check is more generic, since it covers the |
|
741 |
// Proxy case, the JDK 1.3 serialization code has |
|
742 |
// both checks |
|
743 |
//if ((serializable && localClassDesc.externalizable) || |
|
744 |
// (externalizable && localClassDesc.serializable)) |
|
745 |
// throw new InvalidClassException(localCl.getName(), |
|
746 |
// "Serializable is incompatible with Externalizable"); |
|
747 |
||
748 |
if ((serializable != localClassDesc.serializable) || |
|
749 |
(externalizable != localClassDesc.externalizable) || |
|
750 |
(!serializable && !externalizable)) |
|
751 |
||
752 |
// XXX I18N, logging needed |
|
753 |
throw new InvalidClassException(cl.getName(), |
|
754 |
"Serialization incompatible with Externalization"); |
|
755 |
||
756 |
/* Set up the reflected Fields in the class where the value of each |
|
757 |
* field in this descriptor should be stored. |
|
758 |
* Each field in this ObjectStreamClass (the source) is located (by |
|
759 |
* name) in the ObjectStreamClass of the class(the destination). |
|
760 |
* In the usual (non-versioned case) the field is in both |
|
761 |
* descriptors and the types match, so the reflected Field is copied. |
|
762 |
* If the type does not match, a InvalidClass exception is thrown. |
|
763 |
* If the field is not present in the class, the reflected Field |
|
764 |
* remains null so the field will be read but discarded. |
|
765 |
* If extra fields are present in the class they are ignored. Their |
|
766 |
* values will be set to the default value by the object allocator. |
|
767 |
* Both the src and dest field list are sorted by type and name. |
|
768 |
*/ |
|
769 |
||
770 |
ObjectStreamField[] destfield = |
|
771 |
(ObjectStreamField[])localClassDesc.fields; |
|
772 |
ObjectStreamField[] srcfield = |
|
773 |
(ObjectStreamField[])fields; |
|
774 |
||
775 |
int j = 0; |
|
776 |
nextsrc: |
|
777 |
for (int i = 0; i < srcfield.length; i++ ) { |
|
778 |
/* Find this field in the dest*/ |
|
779 |
for (int k = j; k < destfield.length; k++) { |
|
780 |
if (srcfield[i].getName().equals(destfield[k].getName())) { |
|
781 |
/* found match */ |
|
782 |
if (srcfield[i].isPrimitive() && |
|
783 |
!srcfield[i].typeEquals(destfield[k])) { |
|
784 |
// XXX I18N, logging needed |
|
785 |
throw new InvalidClassException(cl.getName(), |
|
786 |
"The type of field " + |
|
787 |
srcfield[i].getName() + |
|
788 |
" of class " + name + |
|
789 |
" is incompatible."); |
|
790 |
} |
|
791 |
||
792 |
/* Skip over any fields in the dest that are not in the src */ |
|
793 |
j = k; |
|
794 |
||
795 |
srcfield[i].setField(destfield[j].getField()); |
|
796 |
// go on to the next source field |
|
797 |
continue nextsrc; |
|
798 |
} |
|
799 |
} |
|
800 |
} |
|
801 |
||
802 |
/* Set up field data for use while reading from the input stream. */ |
|
803 |
computeFieldInfo(); |
|
804 |
||
805 |
/* Remember the class this represents */ |
|
806 |
ofClass = cl; |
|
807 |
||
808 |
/* get the cache of these methods from the local class |
|
809 |
* implementation. |
|
810 |
*/ |
|
811 |
readObjectMethod = localClassDesc.readObjectMethod; |
|
812 |
readResolveObjectMethod = localClassDesc.readResolveObjectMethod; |
|
813 |
} |
|
814 |
||
815 |
/* Compare the base class names of streamName and localName. |
|
816 |
* |
|
817 |
* @return Return true iff the base class name compare. |
|
818 |
* @parameter streamName Fully qualified class name. |
|
819 |
* @parameter localName Fully qualified class name. |
|
820 |
* @parameter pkgSeparator class names use either '.' or '/'. |
|
821 |
* |
|
822 |
* Only compare base class name to allow package renaming. |
|
823 |
*/ |
|
824 |
static boolean compareClassNames(String streamName, |
|
825 |
String localName, |
|
826 |
char pkgSeparator) { |
|
827 |
/* compare the class names, stripping off package names. */ |
|
828 |
int streamNameIndex = streamName.lastIndexOf(pkgSeparator); |
|
829 |
if (streamNameIndex < 0) |
|
830 |
streamNameIndex = 0; |
|
831 |
||
832 |
int localNameIndex = localName.lastIndexOf(pkgSeparator); |
|
833 |
if (localNameIndex < 0) |
|
834 |
localNameIndex = 0; |
|
835 |
||
836 |
return streamName.regionMatches(false, streamNameIndex, |
|
837 |
localName, localNameIndex, |
|
838 |
streamName.length() - streamNameIndex); |
|
839 |
} |
|
840 |
||
841 |
/* |
|
842 |
* Compare the types of two class descriptors. |
|
843 |
* They match if they have the same class name and suid |
|
844 |
*/ |
|
845 |
final boolean typeEquals(ObjectStreamClass other) { |
|
846 |
return (suid == other.suid) && |
|
847 |
compareClassNames(name, other.name, '.'); |
|
848 |
} |
|
849 |
||
850 |
/* |
|
851 |
* Return the superclass descriptor of this descriptor. |
|
852 |
*/ |
|
853 |
final void setSuperclass(ObjectStreamClass s) { |
|
854 |
superclass = s; |
|
855 |
} |
|
856 |
||
857 |
/* |
|
858 |
* Return the superclass descriptor of this descriptor. |
|
859 |
*/ |
|
860 |
final ObjectStreamClass getSuperclass() { |
|
861 |
return superclass; |
|
862 |
} |
|
863 |
||
864 |
/** |
|
865 |
* Return whether the class has a readObject method |
|
866 |
*/ |
|
867 |
final boolean hasReadObject() { |
|
868 |
return readObjectMethod != null; |
|
869 |
} |
|
870 |
||
871 |
/* |
|
872 |
* Return whether the class has a writeObject method |
|
873 |
*/ |
|
874 |
final boolean hasWriteObject() { |
|
875 |
return writeObjectMethod != null ; |
|
876 |
} |
|
877 |
||
878 |
/** |
|
879 |
* Returns when or not this class should be custom |
|
880 |
* marshaled (use chunking). This should happen if |
|
881 |
* it is Externalizable OR if it or |
|
882 |
* any of its superclasses has a writeObject method, |
|
883 |
*/ |
|
884 |
final boolean isCustomMarshaled() { |
|
885 |
return (hasWriteObject() || isExternalizable()) |
|
886 |
|| (superclass != null && superclass.isCustomMarshaled()); |
|
887 |
} |
|
888 |
||
889 |
/* |
|
890 |
* Return true if all instances of 'this' Externalizable class |
|
891 |
* are written in block-data mode from the stream that 'this' was read |
|
892 |
* from. <p> |
|
893 |
* |
|
894 |
* In JDK 1.1, all Externalizable instances are not written |
|
895 |
* in block-data mode. |
|
896 |
* In JDK 1.2, all Externalizable instances, by default, are written |
|
897 |
* in block-data mode and the Externalizable instance is terminated with |
|
898 |
* tag TC_ENDBLOCKDATA. Change enabled the ability to skip Externalizable |
|
899 |
* instances. |
|
900 |
* |
|
901 |
* IMPLEMENTATION NOTE: |
|
902 |
* This should have been a mode maintained per stream; however, |
|
903 |
* for compatibility reasons, it was only possible to record |
|
904 |
* this change per class. All Externalizable classes within |
|
905 |
* a given stream should either have this mode enabled or |
|
906 |
* disabled. This is enforced by not allowing the PROTOCOL_VERSION |
|
907 |
* of a stream to he changed after any objects have been written. |
|
908 |
* |
|
909 |
* @see ObjectOutputStream#useProtocolVersion |
|
910 |
* @see ObjectStreamConstants#PROTOCOL_VERSION_1 |
|
911 |
* @see ObjectStreamConstants#PROTOCOL_VERSION_2 |
|
912 |
* |
|
913 |
* @since JDK 1.2 |
|
914 |
*/ |
|
915 |
boolean hasExternalizableBlockDataMode() { |
|
916 |
return hasExternalizableBlockData; |
|
917 |
} |
|
918 |
||
919 |
/** |
|
920 |
* Creates a new instance of the represented class. If the class is |
|
921 |
* externalizable, invokes its public no-arg constructor; otherwise, if the |
|
922 |
* class is serializable, invokes the no-arg constructor of the first |
|
923 |
* non-serializable superclass. Throws UnsupportedOperationException if |
|
924 |
* this class descriptor is not associated with a class, if the associated |
|
925 |
* class is non-serializable or if the appropriate no-arg constructor is |
|
926 |
* inaccessible/unavailable. |
|
927 |
*/ |
|
928 |
Object newInstance() |
|
929 |
throws InstantiationException, InvocationTargetException, |
|
930 |
UnsupportedOperationException |
|
931 |
{ |
|
932 |
if (cons != null) { |
|
933 |
try { |
|
934 |
return cons.newInstance(new Object[0]); |
|
935 |
} catch (IllegalAccessException ex) { |
|
936 |
// should not occur, as access checks have been suppressed |
|
937 |
InternalError ie = new InternalError(); |
|
938 |
ie.initCause( ex ) ; |
|
939 |
throw ie ; |
|
940 |
} |
|
941 |
} else { |
|
942 |
throw new UnsupportedOperationException(); |
|
943 |
} |
|
944 |
} |
|
945 |
||
946 |
/** |
|
947 |
* Returns public no-arg constructor of given class, or null if none found. |
|
948 |
* Access checks are disabled on the returned constructor (if any), since |
|
949 |
* the defining class may still be non-public. |
|
950 |
*/ |
|
951 |
private static Constructor getExternalizableConstructor(Class cl) { |
|
952 |
try { |
|
953 |
Constructor cons = cl.getDeclaredConstructor(new Class[0]); |
|
954 |
cons.setAccessible(true); |
|
955 |
return ((cons.getModifiers() & Modifier.PUBLIC) != 0) ? |
|
956 |
cons : null; |
|
957 |
} catch (NoSuchMethodException ex) { |
|
958 |
return null; |
|
959 |
} |
|
960 |
} |
|
961 |
||
962 |
/** |
|
963 |
* Returns subclass-accessible no-arg constructor of first non-serializable |
|
964 |
* superclass, or null if none found. Access checks are disabled on the |
|
965 |
* returned constructor (if any). |
|
966 |
*/ |
|
967 |
private static Constructor getSerializableConstructor(Class cl) { |
|
968 |
Class initCl = cl; |
|
969 |
while (Serializable.class.isAssignableFrom(initCl)) { |
|
970 |
if ((initCl = initCl.getSuperclass()) == null) { |
|
971 |
return null; |
|
972 |
} |
|
973 |
} |
|
974 |
try { |
|
975 |
Constructor cons = initCl.getDeclaredConstructor(new Class[0]); |
|
976 |
int mods = cons.getModifiers(); |
|
977 |
if ((mods & Modifier.PRIVATE) != 0 || |
|
978 |
((mods & (Modifier.PUBLIC | Modifier.PROTECTED)) == 0 && |
|
979 |
!packageEquals(cl, initCl))) |
|
980 |
{ |
|
981 |
return null; |
|
982 |
} |
|
983 |
cons = bridge.newConstructorForSerialization(cl, cons); |
|
984 |
cons.setAccessible(true); |
|
985 |
return cons; |
|
986 |
} catch (NoSuchMethodException ex) { |
|
987 |
return null; |
|
988 |
} |
|
989 |
} |
|
990 |
||
991 |
/* |
|
992 |
* Return the ObjectStreamClass of the local class this one is based on. |
|
993 |
*/ |
|
994 |
final ObjectStreamClass localClassDescriptor() { |
|
995 |
return localClassDesc; |
|
996 |
} |
|
997 |
||
998 |
/* |
|
999 |
* Get the Serializability of the class. |
|
1000 |
*/ |
|
1001 |
boolean isSerializable() { |
|
1002 |
return serializable; |
|
1003 |
} |
|
1004 |
||
1005 |
/* |
|
1006 |
* Get the externalizability of the class. |
|
1007 |
*/ |
|
1008 |
boolean isExternalizable() { |
|
1009 |
return externalizable; |
|
1010 |
} |
|
1011 |
||
1012 |
boolean isNonSerializable() { |
|
1013 |
return ! (externalizable || serializable); |
|
1014 |
} |
|
1015 |
||
1016 |
/* |
|
1017 |
* Calculate the size of the array needed to store primitive data and the |
|
1018 |
* number of object references to read when reading from the input |
|
1019 |
* stream. |
|
1020 |
*/ |
|
1021 |
private void computeFieldInfo() { |
|
1022 |
primBytes = 0; |
|
1023 |
objFields = 0; |
|
1024 |
||
1025 |
for (int i = 0; i < fields.length; i++ ) { |
|
1026 |
switch (fields[i].getTypeCode()) { |
|
1027 |
case 'B': |
|
1028 |
case 'Z': |
|
1029 |
primBytes += 1; |
|
1030 |
break; |
|
1031 |
case 'C': |
|
1032 |
case 'S': |
|
1033 |
primBytes += 2; |
|
1034 |
break; |
|
1035 |
||
1036 |
case 'I': |
|
1037 |
case 'F': |
|
1038 |
primBytes += 4; |
|
1039 |
break; |
|
1040 |
case 'J': |
|
1041 |
case 'D' : |
|
1042 |
primBytes += 8; |
|
1043 |
break; |
|
1044 |
||
1045 |
case 'L': |
|
1046 |
case '[': |
|
1047 |
objFields += 1; |
|
1048 |
break; |
|
1049 |
} |
|
1050 |
} |
|
1051 |
} |
|
1052 |
||
1053 |
private static void msg( String str ) |
|
1054 |
{ |
|
1055 |
System.out.println( str ) ; |
|
1056 |
} |
|
1057 |
||
1058 |
/* JDK 1.5 has introduced some new modifier bits (such as SYNTHETIC) |
|
1059 |
* that can affect the SVUID computation (see bug 4897937). These bits |
|
1060 |
* must be ignored, as otherwise interoperability with ORBs in earlier |
|
1061 |
* JDK versions can be compromised. I am adding these masks for this |
|
1062 |
* purpose as discussed in the CCC for this bug (see http://ccc.sfbay/4897937). |
|
1063 |
*/ |
|
1064 |
||
1065 |
public static final int CLASS_MASK = Modifier.PUBLIC | Modifier.FINAL | |
|
1066 |
Modifier.INTERFACE | Modifier.ABSTRACT ; |
|
1067 |
public static final int FIELD_MASK = Modifier.PUBLIC | Modifier.PRIVATE | |
|
1068 |
Modifier.PROTECTED | Modifier.STATIC | Modifier.FINAL | |
|
1069 |
Modifier.TRANSIENT | Modifier.VOLATILE ; |
|
1070 |
public static final int METHOD_MASK = Modifier.PUBLIC | Modifier.PRIVATE | |
|
1071 |
Modifier.PROTECTED | Modifier.STATIC | Modifier.FINAL | |
|
1072 |
Modifier.SYNCHRONIZED | Modifier.NATIVE | Modifier.ABSTRACT | |
|
1073 |
Modifier.STRICT ; |
|
1074 |
||
1075 |
/* |
|
1076 |
* Compute a hash for the specified class. Incrementally add |
|
1077 |
* items to the hash accumulating in the digest stream. |
|
1078 |
* Fold the hash into a long. Use the SHA secure hash function. |
|
1079 |
*/ |
|
1080 |
private static long _computeSerialVersionUID(Class cl) { |
|
1081 |
if (DEBUG_SVUID) |
|
1082 |
msg( "Computing SerialVersionUID for " + cl ) ; |
|
1083 |
ByteArrayOutputStream devnull = new ByteArrayOutputStream(512); |
|
1084 |
||
1085 |
long h = 0; |
|
1086 |
try { |
|
1087 |
MessageDigest md = MessageDigest.getInstance("SHA"); |
|
1088 |
DigestOutputStream mdo = new DigestOutputStream(devnull, md); |
|
1089 |
DataOutputStream data = new DataOutputStream(mdo); |
|
1090 |
||
1091 |
if (DEBUG_SVUID) |
|
1092 |
msg( "\twriteUTF( \"" + cl.getName() + "\" )" ) ; |
|
1093 |
data.writeUTF(cl.getName()); |
|
1094 |
||
1095 |
int classaccess = cl.getModifiers(); |
|
1096 |
classaccess &= (Modifier.PUBLIC | Modifier.FINAL | |
|
1097 |
Modifier.INTERFACE | Modifier.ABSTRACT); |
|
1098 |
||
1099 |
/* Workaround for javac bug that only set ABSTRACT for |
|
1100 |
* interfaces if the interface had some methods. |
|
1101 |
* The ABSTRACT bit reflects that the number of methods > 0. |
|
1102 |
* This is required so correct hashes can be computed |
|
1103 |
* for existing class files. |
|
1104 |
* Previously this hack was previously present in the VM. |
|
1105 |
*/ |
|
1106 |
Method[] method = cl.getDeclaredMethods(); |
|
1107 |
if ((classaccess & Modifier.INTERFACE) != 0) { |
|
1108 |
classaccess &= (~Modifier.ABSTRACT); |
|
1109 |
if (method.length > 0) { |
|
1110 |
classaccess |= Modifier.ABSTRACT; |
|
1111 |
} |
|
1112 |
} |
|
1113 |
||
1114 |
// Mask out any post-1.4 attributes |
|
1115 |
classaccess &= CLASS_MASK ; |
|
1116 |
||
1117 |
if (DEBUG_SVUID) |
|
1118 |
msg( "\twriteInt( " + classaccess + " ) " ) ; |
|
1119 |
data.writeInt(classaccess); |
|
1120 |
||
1121 |
/* |
|
1122 |
* Get the list of interfaces supported, |
|
1123 |
* Accumulate their names their names in Lexical order |
|
1124 |
* and add them to the hash |
|
1125 |
*/ |
|
1126 |
if (!cl.isArray()) { |
|
1127 |
/* In 1.2fcs, getInterfaces() was modified to return |
|
1128 |
* {java.lang.Cloneable, java.io.Serializable} when |
|
1129 |
* called on array classes. These values would upset |
|
1130 |
* the computation of the hash, so we explicitly omit |
|
1131 |
* them from its computation. |
|
1132 |
*/ |
|
1133 |
||
1134 |
Class interfaces[] = cl.getInterfaces(); |
|
1135 |
Arrays.sort(interfaces, compareClassByName); |
|
1136 |
||
1137 |
for (int i = 0; i < interfaces.length; i++) { |
|
1138 |
if (DEBUG_SVUID) |
|
1139 |
msg( "\twriteUTF( \"" + interfaces[i].getName() + "\" ) " ) ; |
|
1140 |
data.writeUTF(interfaces[i].getName()); |
|
1141 |
} |
|
1142 |
} |
|
1143 |
||
1144 |
/* Sort the field names to get a deterministic order */ |
|
1145 |
Field[] field = cl.getDeclaredFields(); |
|
1146 |
Arrays.sort(field, compareMemberByName); |
|
1147 |
||
1148 |
for (int i = 0; i < field.length; i++) { |
|
1149 |
Field f = field[i]; |
|
1150 |
||
1151 |
/* Include in the hash all fields except those that are |
|
1152 |
* private transient and private static. |
|
1153 |
*/ |
|
1154 |
int m = f.getModifiers(); |
|
1155 |
if (Modifier.isPrivate(m) && |
|
1156 |
(Modifier.isTransient(m) || Modifier.isStatic(m))) |
|
1157 |
continue; |
|
1158 |
||
1159 |
if (DEBUG_SVUID) |
|
1160 |
msg( "\twriteUTF( \"" + f.getName() + "\" ) " ) ; |
|
1161 |
data.writeUTF(f.getName()); |
|
1162 |
||
1163 |
// Mask out any post-1.4 bits |
|
1164 |
m &= FIELD_MASK ; |
|
1165 |
||
1166 |
if (DEBUG_SVUID) |
|
1167 |
msg( "\twriteInt( " + m + " ) " ) ; |
|
1168 |
data.writeInt(m); |
|
1169 |
||
1170 |
if (DEBUG_SVUID) |
|
1171 |
msg( "\twriteUTF( \"" + getSignature(f.getType()) + "\" ) " ) ; |
|
1172 |
data.writeUTF(getSignature(f.getType())); |
|
1173 |
} |
|
1174 |
||
1175 |
if (hasStaticInitializer(cl)) { |
|
1176 |
if (DEBUG_SVUID) |
|
1177 |
msg( "\twriteUTF( \"<clinit>\" ) " ) ; |
|
1178 |
data.writeUTF("<clinit>"); |
|
1179 |
||
1180 |
if (DEBUG_SVUID) |
|
1181 |
msg( "\twriteInt( " + Modifier.STATIC + " )" ) ; |
|
1182 |
data.writeInt(Modifier.STATIC); // TBD: what modifiers does it have |
|
1183 |
||
1184 |
if (DEBUG_SVUID) |
|
1185 |
msg( "\twriteUTF( \"()V\" )" ) ; |
|
1186 |
data.writeUTF("()V"); |
|
1187 |
} |
|
1188 |
||
1189 |
/* |
|
1190 |
* Get the list of constructors including name and signature |
|
1191 |
* Sort lexically, add all except the private constructors |
|
1192 |
* to the hash with their access flags |
|
1193 |
*/ |
|
1194 |
||
1195 |
MethodSignature[] constructors = |
|
1196 |
MethodSignature.removePrivateAndSort(cl.getDeclaredConstructors()); |
|
1197 |
for (int i = 0; i < constructors.length; i++) { |
|
1198 |
MethodSignature c = constructors[i]; |
|
1199 |
String mname = "<init>"; |
|
1200 |
String desc = c.signature; |
|
1201 |
desc = desc.replace('/', '.'); |
|
1202 |
if (DEBUG_SVUID) |
|
1203 |
msg( "\twriteUTF( \"" + mname + "\" )" ) ; |
|
1204 |
data.writeUTF(mname); |
|
1205 |
||
1206 |
// mask out post-1.4 modifiers |
|
1207 |
int modifier = c.member.getModifiers() & METHOD_MASK ; |
|
1208 |
||
1209 |
if (DEBUG_SVUID) |
|
1210 |
msg( "\twriteInt( " + modifier + " ) " ) ; |
|
1211 |
data.writeInt( modifier ) ; |
|
1212 |
||
1213 |
if (DEBUG_SVUID) |
|
1214 |
msg( "\twriteUTF( \"" + desc+ "\" )" ) ; |
|
1215 |
data.writeUTF(desc); |
|
1216 |
} |
|
1217 |
||
1218 |
/* Include in the hash all methods except those that are |
|
1219 |
* private transient and private static. |
|
1220 |
*/ |
|
1221 |
MethodSignature[] methods = |
|
1222 |
MethodSignature.removePrivateAndSort(method); |
|
1223 |
for (int i = 0; i < methods.length; i++ ) { |
|
1224 |
MethodSignature m = methods[i]; |
|
1225 |
String desc = m.signature; |
|
1226 |
desc = desc.replace('/', '.'); |
|
1227 |
||
1228 |
if (DEBUG_SVUID) |
|
1229 |
msg( "\twriteUTF( \"" + m.member.getName()+ "\" )" ) ; |
|
1230 |
data.writeUTF(m.member.getName()); |
|
1231 |
||
1232 |
// mask out post-1.4 modifiers |
|
1233 |
int modifier = m.member.getModifiers() & METHOD_MASK ; |
|
1234 |
||
1235 |
if (DEBUG_SVUID) |
|
1236 |
msg( "\twriteInt( " + modifier + " ) " ) ; |
|
1237 |
data.writeInt( modifier ) ; |
|
1238 |
||
1239 |
if (DEBUG_SVUID) |
|
1240 |
msg( "\twriteUTF( \"" + desc + "\" )" ) ; |
|
1241 |
data.writeUTF(desc); |
|
1242 |
} |
|
1243 |
||
1244 |
/* Compute the hash value for this class. |
|
1245 |
* Use only the first 64 bits of the hash. |
|
1246 |
*/ |
|
1247 |
data.flush(); |
|
1248 |
byte hasharray[] = md.digest(); |
|
1249 |
for (int i = 0; i < Math.min(8, hasharray.length); i++) { |
|
1250 |
h += (long)(hasharray[i] & 255) << (i * 8); |
|
1251 |
} |
|
1252 |
} catch (IOException ignore) { |
|
1253 |
/* can't happen, but be deterministic anyway. */ |
|
1254 |
h = -1; |
|
1255 |
} catch (NoSuchAlgorithmException complain) { |
|
1256 |
SecurityException se = new SecurityException() ; |
|
1257 |
se.initCause( complain ) ; |
|
1258 |
throw se ; |
|
1259 |
} |
|
1260 |
||
1261 |
return h; |
|
1262 |
} |
|
1263 |
||
1264 |
private static long computeStructuralUID(com.sun.corba.se.impl.io.ObjectStreamClass osc, Class cl) { |
|
1265 |
ByteArrayOutputStream devnull = new ByteArrayOutputStream(512); |
|
1266 |
||
1267 |
long h = 0; |
|
1268 |
try { |
|
1269 |
||
1270 |
if ((!java.io.Serializable.class.isAssignableFrom(cl)) || |
|
1271 |
(cl.isInterface())){ |
|
1272 |
return 0; |
|
1273 |
} |
|
1274 |
||
1275 |
if (java.io.Externalizable.class.isAssignableFrom(cl)) { |
|
1276 |
return 1; |
|
1277 |
} |
|
1278 |
||
1279 |
MessageDigest md = MessageDigest.getInstance("SHA"); |
|
1280 |
DigestOutputStream mdo = new DigestOutputStream(devnull, md); |
|
1281 |
DataOutputStream data = new DataOutputStream(mdo); |
|
1282 |
||
1283 |
// Get SUID of parent |
|
1284 |
Class parent = cl.getSuperclass(); |
|
1285 |
if ((parent != null)) |
|
1286 |
// SerialBug 1; acc. to spec the one for |
|
1287 |
// java.lang.object |
|
1288 |
// should be computed and put |
|
1289 |
// && (parent != java.lang.Object.class)) |
|
1290 |
{ |
|
1291 |
//data.writeLong(computeSerialVersionUID(null,parent)); |
|
1292 |
data.writeLong(computeStructuralUID(lookup(parent), parent)); |
|
1293 |
} |
|
1294 |
||
1295 |
if (osc.hasWriteObject()) |
|
1296 |
data.writeInt(2); |
|
1297 |
else |
|
1298 |
data.writeInt(1); |
|
1299 |
||
1300 |
// CORBA formal 00-11-03 10.6.2: For each field of the |
|
1301 |
// class that is mapped to IDL, sorted lexicographically |
|
1302 |
// by Java field name, in increasing order... |
|
1303 |
ObjectStreamField[] field = osc.getFields(); |
|
1304 |
if (field.length > 1) { |
|
1305 |
Arrays.sort(field, compareObjStrFieldsByName); |
|
1306 |
} |
|
1307 |
||
1308 |
// ...Java field name in UTF encoding, field |
|
1309 |
// descriptor, as defined by the JVM spec... |
|
1310 |
for (int i = 0; i < field.length; i++) { |
|
1311 |
data.writeUTF(field[i].getName()); |
|
1312 |
data.writeUTF(field[i].getSignature()); |
|
1313 |
} |
|
1314 |
||
1315 |
/* Compute the hash value for this class. |
|
1316 |
* Use only the first 64 bits of the hash. |
|
1317 |
*/ |
|
1318 |
data.flush(); |
|
1319 |
byte hasharray[] = md.digest(); |
|
1320 |
// int minimum = Math.min(8, hasharray.length); |
|
1321 |
// SerialBug 3: SHA computation is wrong; for loop reversed |
|
1322 |
//for (int i = minimum; i > 0; i--) |
|
1323 |
for (int i = 0; i < Math.min(8, hasharray.length); i++) { |
|
1324 |
h += (long)(hasharray[i] & 255) << (i * 8); |
|
1325 |
} |
|
1326 |
} catch (IOException ignore) { |
|
1327 |
/* can't happen, but be deterministic anyway. */ |
|
1328 |
h = -1; |
|
1329 |
} catch (NoSuchAlgorithmException complain) { |
|
1330 |
SecurityException se = new SecurityException(); |
|
1331 |
se.initCause( complain ) ; |
|
1332 |
throw se ; |
|
1333 |
} |
|
1334 |
return h; |
|
1335 |
} |
|
1336 |
||
1337 |
/** |
|
1338 |
* Compute the JVM signature for the class. |
|
1339 |
*/ |
|
1340 |
static String getSignature(Class clazz) { |
|
1341 |
String type = null; |
|
1342 |
if (clazz.isArray()) { |
|
1343 |
Class cl = clazz; |
|
1344 |
int dimensions = 0; |
|
1345 |
while (cl.isArray()) { |
|
1346 |
dimensions++; |
|
1347 |
cl = cl.getComponentType(); |
|
1348 |
} |
|
1349 |
StringBuffer sb = new StringBuffer(); |
|
1350 |
for (int i = 0; i < dimensions; i++) { |
|
1351 |
sb.append("["); |
|
1352 |
} |
|
1353 |
sb.append(getSignature(cl)); |
|
1354 |
type = sb.toString(); |
|
1355 |
} else if (clazz.isPrimitive()) { |
|
1356 |
if (clazz == Integer.TYPE) { |
|
1357 |
type = "I"; |
|
1358 |
} else if (clazz == Byte.TYPE) { |
|
1359 |
type = "B"; |
|
1360 |
} else if (clazz == Long.TYPE) { |
|
1361 |
type = "J"; |
|
1362 |
} else if (clazz == Float.TYPE) { |
|
1363 |
type = "F"; |
|
1364 |
} else if (clazz == Double.TYPE) { |
|
1365 |
type = "D"; |
|
1366 |
} else if (clazz == Short.TYPE) { |
|
1367 |
type = "S"; |
|
1368 |
} else if (clazz == Character.TYPE) { |
|
1369 |
type = "C"; |
|
1370 |
} else if (clazz == Boolean.TYPE) { |
|
1371 |
type = "Z"; |
|
1372 |
} else if (clazz == Void.TYPE) { |
|
1373 |
type = "V"; |
|
1374 |
} |
|
1375 |
} else { |
|
1376 |
type = "L" + clazz.getName().replace('.', '/') + ";"; |
|
1377 |
} |
|
1378 |
return type; |
|
1379 |
} |
|
1380 |
||
1381 |
/* |
|
1382 |
* Compute the JVM method descriptor for the method. |
|
1383 |
*/ |
|
1384 |
static String getSignature(Method meth) { |
|
1385 |
StringBuffer sb = new StringBuffer(); |
|
1386 |
||
1387 |
sb.append("("); |
|
1388 |
||
1389 |
Class[] params = meth.getParameterTypes(); // avoid clone |
|
1390 |
for (int j = 0; j < params.length; j++) { |
|
1391 |
sb.append(getSignature(params[j])); |
|
1392 |
} |
|
1393 |
sb.append(")"); |
|
1394 |
sb.append(getSignature(meth.getReturnType())); |
|
1395 |
return sb.toString(); |
|
1396 |
} |
|
1397 |
||
1398 |
/* |
|
1399 |
* Compute the JVM constructor descriptor for the constructor. |
|
1400 |
*/ |
|
1401 |
static String getSignature(Constructor cons) { |
|
1402 |
StringBuffer sb = new StringBuffer(); |
|
1403 |
||
1404 |
sb.append("("); |
|
1405 |
||
1406 |
Class[] params = cons.getParameterTypes(); // avoid clone |
|
1407 |
for (int j = 0; j < params.length; j++) { |
|
1408 |
sb.append(getSignature(params[j])); |
|
1409 |
} |
|
1410 |
sb.append(")V"); |
|
1411 |
return sb.toString(); |
|
1412 |
} |
|
1413 |
||
1414 |
/* |
|
1415 |
* Cache of Class -> ClassDescriptor Mappings. |
|
1416 |
*/ |
|
1417 |
static private ObjectStreamClassEntry[] descriptorFor = new ObjectStreamClassEntry[61]; |
|
1418 |
||
1419 |
/* |
|
1420 |
* findDescriptorFor a Class. This looks in the cache for a |
|
1421 |
* mapping from Class -> ObjectStreamClass mappings. The hashCode |
|
1422 |
* of the Class is used for the lookup since the Class is the key. |
|
1423 |
* The entries are extended from java.lang.ref.SoftReference so the |
|
1424 |
* gc will be able to free them if needed. |
|
1425 |
*/ |
|
1426 |
private static ObjectStreamClass findDescriptorFor(Class cl) { |
|
1427 |
||
1428 |
int hash = cl.hashCode(); |
|
1429 |
int index = (hash & 0x7FFFFFFF) % descriptorFor.length; |
|
1430 |
ObjectStreamClassEntry e; |
|
1431 |
ObjectStreamClassEntry prev; |
|
1432 |
||
1433 |
/* Free any initial entries whose refs have been cleared */ |
|
1434 |
while ((e = descriptorFor[index]) != null && e.get() == null) { |
|
1435 |
descriptorFor[index] = e.next; |
|
1436 |
} |
|
1437 |
||
1438 |
/* Traverse the chain looking for a descriptor with ofClass == cl. |
|
1439 |
* unlink entries that are unresolved. |
|
1440 |
*/ |
|
1441 |
prev = e; |
|
1442 |
while (e != null ) { |
|
1443 |
ObjectStreamClass desc = (ObjectStreamClass)(e.get()); |
|
1444 |
if (desc == null) { |
|
1445 |
// This entry has been cleared, unlink it |
|
1446 |
prev.next = e.next; |
|
1447 |
} else { |
|
1448 |
if (desc.ofClass == cl) |
|
1449 |
return desc; |
|
1450 |
prev = e; |
|
1451 |
} |
|
1452 |
e = e.next; |
|
1453 |
} |
|
1454 |
return null; |
|
1455 |
} |
|
1456 |
||
1457 |
/* |
|
1458 |
* insertDescriptorFor a Class -> ObjectStreamClass mapping. |
|
1459 |
*/ |
|
1460 |
private static void insertDescriptorFor(ObjectStreamClass desc) { |
|
1461 |
// Make sure not already present |
|
1462 |
if (findDescriptorFor(desc.ofClass) != null) { |
|
1463 |
return; |
|
1464 |
} |
|
1465 |
||
1466 |
int hash = desc.ofClass.hashCode(); |
|
1467 |
int index = (hash & 0x7FFFFFFF) % descriptorFor.length; |
|
1468 |
ObjectStreamClassEntry e = new ObjectStreamClassEntry(desc); |
|
1469 |
e.next = descriptorFor[index]; |
|
1470 |
descriptorFor[index] = e; |
|
1471 |
} |
|
1472 |
||
1473 |
private static Field[] getDeclaredFields(final Class clz) { |
|
1474 |
return (Field[]) AccessController.doPrivileged(new PrivilegedAction() { |
|
1475 |
public Object run() { |
|
1476 |
return clz.getDeclaredFields(); |
|
1477 |
} |
|
1478 |
}); |
|
1479 |
} |
|
1480 |
||
1481 |
||
1482 |
/* |
|
1483 |
* The name of this descriptor |
|
1484 |
*/ |
|
1485 |
private String name; |
|
1486 |
||
1487 |
/* |
|
1488 |
* The descriptor of the supertype. |
|
1489 |
*/ |
|
1490 |
private ObjectStreamClass superclass; |
|
1491 |
||
1492 |
/* |
|
1493 |
* Flags for Serializable and Externalizable. |
|
1494 |
*/ |
|
1495 |
private boolean serializable; |
|
1496 |
private boolean externalizable; |
|
1497 |
||
1498 |
/* |
|
1499 |
* Array of persistent fields of this class, sorted by |
|
1500 |
* type and name. |
|
1501 |
*/ |
|
1502 |
private ObjectStreamField[] fields; |
|
1503 |
||
1504 |
/* |
|
1505 |
* Class that is a descriptor for in this virtual machine. |
|
1506 |
*/ |
|
1507 |
private Class ofClass; |
|
1508 |
||
1509 |
/* |
|
1510 |
* True if descriptor for a proxy class. |
|
1511 |
*/ |
|
1512 |
boolean forProxyClass; |
|
1513 |
||
1514 |
||
1515 |
/* |
|
1516 |
* SerialVersionUID for this class. |
|
1517 |
*/ |
|
1518 |
private long suid = kDefaultUID; |
|
1519 |
private String suidStr = null; |
|
1520 |
||
1521 |
/* |
|
1522 |
* Actual (computed) SerialVersionUID for this class. |
|
1523 |
*/ |
|
1524 |
private long actualSuid = kDefaultUID; |
|
1525 |
private String actualSuidStr = null; |
|
1526 |
||
1527 |
/* |
|
1528 |
* The total number of bytes of primitive fields. |
|
1529 |
* The total number of object fields. |
|
1530 |
*/ |
|
1531 |
int primBytes; |
|
1532 |
int objFields; |
|
1533 |
||
1534 |
/** |
|
1535 |
* Flag indicating whether or not this instance has |
|
1536 |
* successfully completed initialization. This is to |
|
1537 |
* try to fix bug 4373844. Working to move to |
|
1538 |
* reusing java.io.ObjectStreamClass for JDK 1.5. |
|
1539 |
*/ |
|
1540 |
private boolean initialized = false; |
|
1541 |
||
1542 |
/* Internal lock object. */ |
|
1543 |
private Object lock = new Object(); |
|
1544 |
||
1545 |
/* In JDK 1.1, external data was not written in block mode. |
|
1546 |
* As of JDK 1.2, external data is written in block data mode. This |
|
1547 |
* flag enables JDK 1.2 to be able to read JDK 1.1 written external data. |
|
1548 |
* |
|
1549 |
* @since JDK 1.2 |
|
1550 |
*/ |
|
1551 |
private boolean hasExternalizableBlockData; |
|
1552 |
Method writeObjectMethod; |
|
1553 |
Method readObjectMethod; |
|
1554 |
private Method writeReplaceObjectMethod; |
|
1555 |
private Method readResolveObjectMethod; |
|
1556 |
private Constructor cons ; |
|
1557 |
||
1558 |
/** |
|
1559 |
* Beginning in Java to IDL ptc/02-01-12, RMI-IIOP has a |
|
1560 |
* stream format version 2 which puts a fake valuetype around |
|
1561 |
* a Serializable's optional custom data. This valuetype has |
|
1562 |
* a special repository ID made from the Serializable's |
|
1563 |
* information which we are pre-computing and |
|
1564 |
* storing here. |
|
1565 |
*/ |
|
1566 |
private String rmiiiopOptionalDataRepId = null; |
|
1567 |
||
1568 |
/* |
|
1569 |
* ObjectStreamClass that this one was built from. |
|
1570 |
*/ |
|
1571 |
private ObjectStreamClass localClassDesc; |
|
1572 |
||
1573 |
/* Find out if the class has a static class initializer <clinit> */ |
|
1574 |
private static Method hasStaticInitializerMethod = null; |
|
1575 |
/** |
|
1576 |
* Returns true if the given class defines a static initializer method, |
|
1577 |
* false otherwise. |
|
1578 |
*/ |
|
1579 |
private static boolean hasStaticInitializer(Class cl) { |
|
1580 |
if (hasStaticInitializerMethod == null) { |
|
1581 |
Class classWithThisMethod = null; |
|
1582 |
||
1583 |
try { |
|
1584 |
try { |
|
1585 |
// When using rip-int with Merlin or when this is a Merlin |
|
1586 |
// workspace, the method we want is in sun.misc.ClassReflector |
|
1587 |
// and absent from java.io.ObjectStreamClass. |
|
1588 |
// |
|
1589 |
// When compiling rip-int with JDK 1.3.x, we have to get it |
|
1590 |
// from java.io.ObjectStreamClass. |
|
1591 |
classWithThisMethod = Class.forName("sun.misc.ClassReflector"); |
|
1592 |
} catch (ClassNotFoundException cnfe) { |
|
1593 |
// Do nothing. This is either not a Merlin workspace, |
|
1594 |
// or rip-int is being compiled with something other than |
|
1595 |
// Merlin, probably JDK 1.3. Fall back on java.io.ObjectStreaClass. |
|
1596 |
} |
|
1597 |
if (classWithThisMethod == null) |
|
1598 |
classWithThisMethod = java.io.ObjectStreamClass.class; |
|
1599 |
||
1600 |
hasStaticInitializerMethod = |
|
1601 |
classWithThisMethod.getDeclaredMethod("hasStaticInitializer", |
|
1602 |
new Class[] { Class.class }); |
|
1603 |
} catch (NoSuchMethodException ex) { |
|
1604 |
} |
|
1605 |
||
1606 |
if (hasStaticInitializerMethod == null) { |
|
1607 |
// XXX I18N, logging needed |
|
1608 |
throw new InternalError("Can't find hasStaticInitializer method on " |
|
1609 |
+ classWithThisMethod.getName()); |
|
1610 |
} |
|
1611 |
hasStaticInitializerMethod.setAccessible(true); |
|
1612 |
} |
|
1613 |
||
1614 |
try { |
|
1615 |
Boolean retval = (Boolean) |
|
1616 |
hasStaticInitializerMethod.invoke(null, new Object[] { cl }); |
|
1617 |
return retval.booleanValue(); |
|
1618 |
} catch (Exception ex) { |
|
1619 |
// XXX I18N, logging needed |
|
1620 |
InternalError ie = new InternalError( "Error invoking hasStaticInitializer" ) ; |
|
1621 |
ie.initCause( ex ) ; |
|
1622 |
throw ie ; |
|
1623 |
} |
|
1624 |
} |
|
1625 |
||
1626 |
||
1627 |
/* The Class Object for java.io.Serializable */ |
|
1628 |
private static Class classSerializable = null; |
|
1629 |
private static Class classExternalizable = null; |
|
1630 |
||
1631 |
/* |
|
1632 |
* Resolve java.io.Serializable at load time. |
|
1633 |
*/ |
|
1634 |
static { |
|
1635 |
try { |
|
1636 |
classSerializable = Class.forName("java.io.Serializable"); |
|
1637 |
classExternalizable = Class.forName("java.io.Externalizable"); |
|
1638 |
} catch (Throwable e) { |
|
1639 |
System.err.println("Could not load java.io.Serializable or java.io.Externalizable."); |
|
1640 |
} |
|
1641 |
} |
|
1642 |
||
1643 |
/** use serialVersionUID from JDK 1.1. for interoperability */ |
|
1644 |
private static final long serialVersionUID = -6120832682080437368L; |
|
1645 |
||
1646 |
/** |
|
1647 |
* Set serialPersistentFields of a Serializable class to this value to |
|
1648 |
* denote that the class has no Serializable fields. |
|
1649 |
*/ |
|
1650 |
public static final ObjectStreamField[] NO_FIELDS = |
|
1651 |
new ObjectStreamField[0]; |
|
1652 |
||
1653 |
/* |
|
1654 |
* Entries held in the Cache of known ObjectStreamClass objects. |
|
1655 |
* Entries are chained together with the same hash value (modulo array size). |
|
1656 |
*/ |
|
1657 |
private static class ObjectStreamClassEntry // extends java.lang.ref.SoftReference |
|
1658 |
{ |
|
1659 |
ObjectStreamClassEntry(ObjectStreamClass c) { |
|
1660 |
//super(c); |
|
1661 |
this.c = c; |
|
1662 |
} |
|
1663 |
ObjectStreamClassEntry next; |
|
1664 |
||
1665 |
public Object get() |
|
1666 |
{ |
|
1667 |
return c; |
|
1668 |
} |
|
1669 |
private ObjectStreamClass c; |
|
1670 |
} |
|
1671 |
||
1672 |
/* |
|
1673 |
* Comparator object for Classes and Interfaces |
|
1674 |
*/ |
|
1675 |
private static Comparator compareClassByName = |
|
1676 |
new CompareClassByName(); |
|
1677 |
||
1678 |
private static class CompareClassByName implements Comparator { |
|
1679 |
public int compare(Object o1, Object o2) { |
|
1680 |
Class c1 = (Class)o1; |
|
1681 |
Class c2 = (Class)o2; |
|
1682 |
return (c1.getName()).compareTo(c2.getName()); |
|
1683 |
} |
|
1684 |
} |
|
1685 |
||
1686 |
/** |
|
1687 |
* Comparator for ObjectStreamFields by name |
|
1688 |
*/ |
|
1689 |
private final static Comparator compareObjStrFieldsByName |
|
1690 |
= new CompareObjStrFieldsByName(); |
|
1691 |
||
1692 |
private static class CompareObjStrFieldsByName implements Comparator { |
|
1693 |
public int compare(Object o1, Object o2) { |
|
1694 |
ObjectStreamField osf1 = (ObjectStreamField)o1; |
|
1695 |
ObjectStreamField osf2 = (ObjectStreamField)o2; |
|
1696 |
||
1697 |
return osf1.getName().compareTo(osf2.getName()); |
|
1698 |
} |
|
1699 |
} |
|
1700 |
||
1701 |
/* |
|
1702 |
* Comparator object for Members, Fields, and Methods |
|
1703 |
*/ |
|
1704 |
private static Comparator compareMemberByName = |
|
1705 |
new CompareMemberByName(); |
|
1706 |
||
1707 |
private static class CompareMemberByName implements Comparator { |
|
1708 |
public int compare(Object o1, Object o2) { |
|
1709 |
String s1 = ((Member)o1).getName(); |
|
1710 |
String s2 = ((Member)o2).getName(); |
|
1711 |
||
1712 |
if (o1 instanceof Method) { |
|
1713 |
s1 += getSignature((Method)o1); |
|
1714 |
s2 += getSignature((Method)o2); |
|
1715 |
} else if (o1 instanceof Constructor) { |
|
1716 |
s1 += getSignature((Constructor)o1); |
|
1717 |
s2 += getSignature((Constructor)o2); |
|
1718 |
} |
|
1719 |
return s1.compareTo(s2); |
|
1720 |
} |
|
1721 |
} |
|
1722 |
||
1723 |
/* It is expensive to recompute a method or constructor signature |
|
1724 |
many times, so compute it only once using this data structure. */ |
|
1725 |
private static class MethodSignature implements Comparator { |
|
1726 |
Member member; |
|
1727 |
String signature; // cached parameter signature |
|
1728 |
||
1729 |
/* Given an array of Method or Constructor members, |
|
1730 |
return a sorted array of the non-private members.*/ |
|
1731 |
/* A better implementation would be to implement the returned data |
|
1732 |
structure as an insertion sorted link list.*/ |
|
1733 |
static MethodSignature[] removePrivateAndSort(Member[] m) { |
|
1734 |
int numNonPrivate = 0; |
|
1735 |
for (int i = 0; i < m.length; i++) { |
|
1736 |
if (! Modifier.isPrivate(m[i].getModifiers())) { |
|
1737 |
numNonPrivate++; |
|
1738 |
} |
|
1739 |
} |
|
1740 |
MethodSignature[] cm = new MethodSignature[numNonPrivate]; |
|
1741 |
int cmi = 0; |
|
1742 |
for (int i = 0; i < m.length; i++) { |
|
1743 |
if (! Modifier.isPrivate(m[i].getModifiers())) { |
|
1744 |
cm[cmi] = new MethodSignature(m[i]); |
|
1745 |
cmi++; |
|
1746 |
} |
|
1747 |
} |
|
1748 |
if (cmi > 0) |
|
1749 |
Arrays.sort(cm, cm[0]); |
|
1750 |
return cm; |
|
1751 |
} |
|
1752 |
||
1753 |
/* Assumes that o1 and o2 are either both methods |
|
1754 |
or both constructors.*/ |
|
1755 |
public int compare(Object o1, Object o2) { |
|
1756 |
/* Arrays.sort calls compare when o1 and o2 are equal.*/ |
|
1757 |
if (o1 == o2) |
|
1758 |
return 0; |
|
1759 |
||
1760 |
MethodSignature c1 = (MethodSignature)o1; |
|
1761 |
MethodSignature c2 = (MethodSignature)o2; |
|
1762 |
||
1763 |
int result; |
|
1764 |
if (isConstructor()) { |
|
1765 |
result = c1.signature.compareTo(c2.signature); |
|
1766 |
} else { // is a Method. |
|
1767 |
result = c1.member.getName().compareTo(c2.member.getName()); |
|
1768 |
if (result == 0) |
|
1769 |
result = c1.signature.compareTo(c2.signature); |
|
1770 |
} |
|
1771 |
return result; |
|
1772 |
} |
|
1773 |
||
1774 |
final private boolean isConstructor() { |
|
1775 |
return member instanceof Constructor; |
|
1776 |
} |
|
1777 |
private MethodSignature(Member m) { |
|
1778 |
member = m; |
|
1779 |
if (isConstructor()) { |
|
1780 |
signature = ObjectStreamClass.getSignature((Constructor)m); |
|
1781 |
} else { |
|
1782 |
signature = ObjectStreamClass.getSignature((Method)m); |
|
1783 |
} |
|
1784 |
} |
|
1785 |
} |
|
1786 |
||
1787 |
/** |
|
1788 |
* Returns non-static, non-abstract method with given signature provided it |
|
1789 |
* is defined by or accessible (via inheritance) by the given class, or |
|
1790 |
* null if no match found. Access checks are disabled on the returned |
|
1791 |
* method (if any). |
|
1792 |
* |
|
1793 |
* Copied from the Merlin java.io.ObjectStreamClass. |
|
1794 |
*/ |
|
1795 |
private static Method getInheritableMethod(Class cl, String name, |
|
1796 |
Class[] argTypes, |
|
1797 |
Class returnType) |
|
1798 |
{ |
|
1799 |
Method meth = null; |
|
1800 |
Class defCl = cl; |
|
1801 |
while (defCl != null) { |
|
1802 |
try { |
|
1803 |
meth = defCl.getDeclaredMethod(name, argTypes); |
|
1804 |
break; |
|
1805 |
} catch (NoSuchMethodException ex) { |
|
1806 |
defCl = defCl.getSuperclass(); |
|
1807 |
} |
|
1808 |
} |
|
1809 |
||
1810 |
if ((meth == null) || (meth.getReturnType() != returnType)) { |
|
1811 |
return null; |
|
1812 |
} |
|
1813 |
meth.setAccessible(true); |
|
1814 |
int mods = meth.getModifiers(); |
|
1815 |
if ((mods & (Modifier.STATIC | Modifier.ABSTRACT)) != 0) { |
|
1816 |
return null; |
|
1817 |
} else if ((mods & (Modifier.PUBLIC | Modifier.PROTECTED)) != 0) { |
|
1818 |
return meth; |
|
1819 |
} else if ((mods & Modifier.PRIVATE) != 0) { |
|
1820 |
return (cl == defCl) ? meth : null; |
|
1821 |
} else { |
|
1822 |
return packageEquals(cl, defCl) ? meth : null; |
|
1823 |
} |
|
1824 |
} |
|
1825 |
||
1826 |
/** |
|
1827 |
* Returns true if classes are defined in the same package, false |
|
1828 |
* otherwise. |
|
1829 |
* |
|
1830 |
* Copied from the Merlin java.io.ObjectStreamClass. |
|
1831 |
*/ |
|
1832 |
private static boolean packageEquals(Class cl1, Class cl2) { |
|
1833 |
Package pkg1 = cl1.getPackage(), pkg2 = cl2.getPackage(); |
|
1834 |
return ((pkg1 == pkg2) || ((pkg1 != null) && (pkg1.equals(pkg2)))); |
|
1835 |
} |
|
1836 |
} |