author | mchung |
Mon, 17 Sep 2018 15:22:46 -0700 | |
changeset 51772 | 5432cebf6627 |
parent 47216 | 71c04702a3d5 |
child 51779 | 1740b162dc0e |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 1996, 2004, 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.misc.SharedSecrets; |
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/** |
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* InvocationTargetException is a checked exception that wraps |
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* an exception thrown by an invoked method or constructor. |
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* |
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* <p>As of release 1.4, this exception has been retrofitted to conform to |
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* the general purpose exception-chaining mechanism. The "target exception" |
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* that is provided at construction time and accessed via the |
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* {@link #getTargetException()} method is now known as the <i>cause</i>, |
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* and may be accessed via the {@link Throwable#getCause()} method, |
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* as well as the aforementioned "legacy method." |
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* |
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* @see Method |
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* @see Constructor |
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* @since 1.1 |
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*/ |
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public class InvocationTargetException extends ReflectiveOperationException { |
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/** |
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* Use serialVersionUID from JDK 1.1.X for interoperability |
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*/ |
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private static final long serialVersionUID = 4085088731926701167L; |
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/** |
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* Constructs an {@code InvocationTargetException} with |
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* {@code null} as the target exception. |
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*/ |
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protected InvocationTargetException() { |
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super((Throwable)null); // Disallow initCause |
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} |
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/** |
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* Constructs a InvocationTargetException with a target exception. |
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* |
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* @param target the target exception |
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*/ |
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public InvocationTargetException(Throwable target) { |
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super(null, target); // Disallow initCause |
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} |
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/** |
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* Constructs a InvocationTargetException with a target exception |
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* and a detail message. |
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* |
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* @param target the target exception |
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* @param s the detail message |
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*/ |
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public InvocationTargetException(Throwable target, String s) { |
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super(s, target); // Disallow initCause |
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} |
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/** |
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* Get the thrown target exception. |
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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 thrown target exception (cause of this exception). |
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*/ |
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public Throwable getTargetException() { |
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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 target Throwable |
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*/ |
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private static final ObjectStreamField[] serialPersistentFields = { |
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new ObjectStreamField("target", Throwable.class) |
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}; |
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/* |
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* Reconstitutes the InvocationTargetException 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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* The getException and getCause method returns the private "target" field |
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* in the older implementation and InvocationTargetException::cause |
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* was set to null. |
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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("target", 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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* "target" 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("target", super.getCause()); |
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out.writeFields(); |
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} |
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} |