author | chegar |
Thu, 17 Oct 2019 20:54:25 +0100 | |
branch | datagramsocketimpl-branch |
changeset 58679 | 9c3209ff7550 |
parent 58678 | 9cf78a70fa4f |
parent 58288 | 48e480e56aad |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 1996, 2019, 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; |
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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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/** |
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* Signals that an unexpected exception has occurred in a static initializer. |
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* An {@code ExceptionInInitializerError} is thrown to indicate that an |
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* exception occurred during evaluation of a static initializer or the |
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* initializer for a static variable. |
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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 "saved throwable |
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* object" that may be provided at construction time and accessed via |
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* the {@link #getException()} method is now known as the <i>cause</i>, |
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* and may be accessed via the {@link Throwable#getCause()} method, as well |
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* as the aforementioned "legacy method." |
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* |
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* @author Frank Yellin |
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* @since 1.1 |
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*/ |
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public class ExceptionInInitializerError extends LinkageError { |
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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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@java.io.Serial |
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private static final long serialVersionUID = 1521711792217232256L; |
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/** |
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* Constructs an {@code ExceptionInInitializerError} with |
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* {@code null} as its detail message string and with no saved |
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* throwable object. |
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* A detail message is a String that describes this particular exception. |
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*/ |
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public ExceptionInInitializerError() { |
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initCause(null); // Disallow subsequent initCause |
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} |
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/** |
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* Constructs a new {@code ExceptionInInitializerError} class by |
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* saving a reference to the {@code Throwable} object thrown for |
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* later retrieval by the {@link #getException()} method. The detail |
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* message string is set to {@code null}. |
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* |
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* @param thrown The exception thrown |
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*/ |
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public ExceptionInInitializerError(Throwable thrown) { |
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super(null, thrown); // Disallow subsequent initCause |
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} |
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/** |
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* Constructs an {@code ExceptionInInitializerError} with the specified detail |
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* message string. A detail message is a String that describes this |
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* particular exception. The detail message string is saved for later |
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* retrieval by the {@link Throwable#getMessage()} method. There is no |
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* saved throwable object. |
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* |
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* @param s the detail message |
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*/ |
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public ExceptionInInitializerError(String s) { |
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super(s, null); // Disallow subsequent initCause |
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} |
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/** |
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* Returns the exception that occurred during a static initialization that |
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* caused this error to be created. |
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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 saved throwable object of this |
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* {@code ExceptionInInitializerError}, or {@code null} |
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* if this {@code ExceptionInInitializerError} has no saved |
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* throwable object. |
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*/ |
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public Throwable getException() { |
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return super.getCause(); |
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} |
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/** |
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* Serializable fields for ExceptionInInitializerError. |
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* |
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* @serialField exception Throwable |
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*/ |
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@java.io.Serial |
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private static final ObjectStreamField[] serialPersistentFields = { |
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new ObjectStreamField("exception", Throwable.class) |
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}; |
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/* |
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* Reconstitutes the ExceptionInInitializerError 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 "exception" |
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* field in the older implementation and ExceptionInInitializerError::cause |
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* was set to null. |
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*/ |
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@java.io.Serial |
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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("exception", null); |
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if (exception != null) { |
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setCause(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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* "exception" field with the cause as the value. |
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*/ |
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@java.io.Serial |
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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("exception", super.getCause()); |
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out.writeFields(); |
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} |
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} |