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jeremybenn |
/* UndeclaredThrowableException.java -- wraps an undeclared checked exception
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thrown by a Proxy invocation handler
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Copyright (C) 2001, 2002, 2005 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package java.lang.reflect;
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/**
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* This exception class is thrown by a {@link Proxy} instance if
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* the {@link InvocationHandler#invoke(Object, Method, Object[]) invoke}
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* method of that instance's InvocationHandler attempts to throw an
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* exception that not declared by the throws clauses of all of the
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* interface methods that the proxy instance is implementing.
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*
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* <p>When thrown by Proxy, this class will always wrap a checked
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* exception, never {@link Error} or {@link RuntimeException},
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* which are unchecked.
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*
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* @author Eric Blake (ebb9@email.byu.edu)
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* @see Proxy
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* @see InvocationHandler
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* @since 1.3
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* @status updated to 1.4
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*/
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public class UndeclaredThrowableException extends RuntimeException
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{
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/**
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* Compatible with JDK 1.3+.
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*/
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private static final long serialVersionUID = 330127114055056639L;
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/**
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* The immutable exception that this wraps. This field is redundant
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* with {@link Throwable#getCause()}, but is necessary for serial compatibility.
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*
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* @serial the chained exception
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*/
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private final Throwable undeclaredThrowable;
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/**
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* Wraps the given checked exception into a RuntimeException, with no
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* detail message. {@link Throwable#initCause(Throwable)} will fail
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* on this instance.
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*
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* @param cause the undeclared throwable that caused this exception,
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* may be null
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*/
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public UndeclaredThrowableException(Throwable cause)
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{
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this(cause, null);
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}
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/**
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* Wraps the given checked exception into a RuntimeException, with the
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* specified detail message. {@link Throwable#initCause(Throwable)} will
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* fail on this instance.
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*
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* @param cause the undeclared throwable that caused this exception,
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* may be null
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* @param message the message, may be null
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*/
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public UndeclaredThrowableException(Throwable cause, String message)
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{
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super(message, cause);
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undeclaredThrowable = cause;
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}
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/**
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* Returns the cause of this exception. If this exception was created
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* by a {@link Proxy} instance, it will be a non-null checked
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* exception. This method pre-dates exception chaining, and is now
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* simply a longer way to call <code>getCause()</code>.
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*
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* @return the cause of this exception, may be null
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* @see #getCause()
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*/
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public Throwable getUndeclaredThrowable()
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{
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return undeclaredThrowable;
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}
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/**
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* Returns the cause of this exception. If this exception was created
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* by a {@link Proxy} instance, it will be a non-null checked
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* exception.
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*
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* @return the cause of this exception, may be null
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* @since 1.4
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*/
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public Throwable getCause()
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{
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return undeclaredThrowable;
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}
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}
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