/*

 * Copyright (c) 1996, 2004, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package java.lang.reflect;

/**

 * InvocationTargetException is a checked exception that wraps

 * an exception thrown by an invoked method or constructor.

 *

 * <p>As of release 1.4, this exception has been retrofitted to conform to

 * the general purpose exception-chaining mechanism.  The "target exception"

 * that is provided at construction time and accessed via the

 * {@link #getTargetException()} method is now known as the <i>cause</i>,

 * and may be accessed via the {@link Throwable#getCause()} method,

 * as well as the aforementioned "legacy method."

 *

 * @see Method

 * @see Constructor

 */

public class InvocationTargetException extends ReflectiveOperationException {

    /**

     * Use serialVersionUID from JDK 1.1.X for interoperability

     */

    private static final long serialVersionUID = 4085088731926701167L;

     /**

     * This field holds the target if the

     * InvocationTargetException(Throwable target) constructor was

     * used to instantiate the object

     *

     * @serial

     *

     */

    private Throwable target;

    /**

     * Constructs an {@code InvocationTargetException} with

     * {@code null} as the target exception.

     */

    protected InvocationTargetException() {

        super((Throwable)null);  // Disallow initCause

    }

    /**

     * Constructs a InvocationTargetException with a target exception.

     *

     * @param target the target exception

     */

    public InvocationTargetException(Throwable target) {

        super((Throwable)null);  // Disallow initCause

        this.target = target;

    }

    /**

     * Constructs a InvocationTargetException with a target exception

     * and a detail message.

     *

     * @param target the target exception

     * @param s      the detail message

     */

    public InvocationTargetException(Throwable target, String s) {

        super(s, null);  // Disallow initCause

        this.target = target;

    }

    /**

     * Get the thrown target exception.

     *

     * <p>This method predates the general-purpose exception chaining facility.

     * The {@link Throwable#getCause()} method is now the preferred means of

     * obtaining this information.

     *

     * @return the thrown target exception (cause of this exception).

     */

    public Throwable getTargetException() {

        return target;

    }

    /**

     * Returns the cause of this exception (the thrown target exception,

     * which may be {@code null}).

     *

     * @return  the cause of this exception.

     * @since   1.4

     */

    public Throwable getCause() {

        return target;

    }

}