author | mchung |
Tue, 06 Nov 2018 10:01:16 -0800 | |
changeset 52427 | 3c6aa484536c |
parent 51772 | 5432cebf6627 |
child 57956 | e0b8b019d2f5 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 1999, 2018, Oracle and/or its affiliates. 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. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package java.lang.reflect; |
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import java.io.IOException; |
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import java.io.ObjectInputStream; |
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import java.io.ObjectOutputStream; |
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import java.io.ObjectStreamField; |
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import jdk.internal.access.SharedSecrets; |
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/** |
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* Thrown by a method invocation on a proxy instance if its invocation |
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* handler's {@link InvocationHandler#invoke invoke} method throws a |
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* checked exception (a {@code Throwable} that is not assignable |
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* to {@code RuntimeException} or {@code Error}) that |
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* is not assignable to any of the exception types declared in the |
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* {@code throws} clause of the method that was invoked on the |
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* proxy instance and dispatched to the invocation handler. |
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* |
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* <p>An {@code UndeclaredThrowableException} instance contains |
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* the undeclared checked exception that was thrown by the invocation |
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* handler, and it can be retrieved with the |
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* {@code getUndeclaredThrowable()} method. |
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* {@code UndeclaredThrowableException} extends |
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* {@code RuntimeException}, so it is an unchecked exception |
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* that wraps a checked exception. |
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* |
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* <p>As of release 1.4, this exception has been retrofitted to |
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* conform to the general purpose exception-chaining mechanism. The |
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* "undeclared checked exception that was thrown by the invocation |
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* handler" that may be provided at construction time and accessed via |
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* the {@link #getUndeclaredThrowable()} method is now known as the |
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* <i>cause</i>, and may be accessed via the {@link |
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* Throwable#getCause()} method, as well as the aforementioned "legacy |
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* method." |
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* |
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* @author Peter Jones |
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* @see InvocationHandler |
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* @since 1.3 |
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*/ |
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public class UndeclaredThrowableException extends RuntimeException { |
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static final long serialVersionUID = 330127114055056639L; |
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/** |
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* Constructs an {@code UndeclaredThrowableException} with the |
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* specified {@code Throwable}. |
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* |
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* @param undeclaredThrowable the undeclared checked exception |
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* that was thrown |
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*/ |
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public UndeclaredThrowableException(Throwable undeclaredThrowable) { |
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super(null, undeclaredThrowable); // Disallow initCause |
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} |
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/** |
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* Constructs an {@code UndeclaredThrowableException} with the |
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* specified {@code Throwable} and a detail message. |
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* |
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* @param undeclaredThrowable the undeclared checked exception |
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* that was thrown |
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* @param s the detail message |
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*/ |
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public UndeclaredThrowableException(Throwable undeclaredThrowable, |
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String s) |
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{ |
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super(s, undeclaredThrowable); // Disallow initCause |
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} |
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/** |
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* Returns the {@code Throwable} instance wrapped in this |
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* {@code UndeclaredThrowableException}, which may be {@code null}. |
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* |
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* <p>This method predates the general-purpose exception chaining facility. |
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* The {@link Throwable#getCause()} method is now the preferred means of |
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* obtaining this information. |
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* |
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* @return the undeclared checked exception that was thrown |
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*/ |
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public Throwable getUndeclaredThrowable() { |
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return super.getCause(); |
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} |
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/** |
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* Serializable fields for UndeclaredThrowableException. |
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* |
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* @serialField undeclaredThrowable Throwable |
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*/ |
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private static final ObjectStreamField[] serialPersistentFields = { |
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new ObjectStreamField("undeclaredThrowable", Throwable.class) |
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}; |
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/* |
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* Reconstitutes the UndeclaredThrowableException instance from a stream |
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* and initialize the cause properly when deserializing from an older |
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* version. |
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*/ |
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private void readObject(ObjectInputStream s) throws IOException, ClassNotFoundException { |
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ObjectInputStream.GetField fields = s.readFields(); |
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Throwable exception = (Throwable) fields.get("undeclaredThrowable", null); |
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if (exception != null) { |
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SharedSecrets.getJavaLangAccess().setCause(this, exception); |
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} |
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} |
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/* |
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* To maintain compatibility with older implementation, write a serial |
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* "ex" field with the cause as the value. |
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*/ |
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private void writeObject(ObjectOutputStream out) throws IOException { |
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ObjectOutputStream.PutField fields = out.putFields(); |
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fields.put("undeclaredThrowable", super.getCause()); |
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out.writeFields(); |
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} |
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} |