/*

 * Copyright (c) 2005, 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.

 */

/*

 * $Id: KeySelectorException.java,v 1.3 2005/05/10 15:47:42 mullan Exp $

 */

package javax.xml.crypto;

import java.io.PrintStream;

import java.io.PrintWriter;

/**

 * Indicates an exceptional condition thrown by a {@link KeySelector}.

 *

 * <p>A {@code KeySelectorException} can contain a cause: another

 * throwable that caused this {@code KeySelectorException} to get thrown.

 *

 * @author Sean Mullan

 * @author JSR 105 Expert Group

 * @since 1.6

 */

public class KeySelectorException extends Exception {

    private static final long serialVersionUID = -7480033639322531109L;

    /**

     * The throwable that caused this exception to get thrown, or

     * {@code null} if this exception was not caused by another throwable

     * or if the causative throwable is unknown.

     *

     * @serial

     */

    private Throwable cause;

    /**

     * Constructs a new {@code KeySelectorException} with

     * {@code null} as its detail message.

     */

    public KeySelectorException() {

        super();

    }

    /**

     * Constructs a new {@code KeySelectorException} with the specified

     * detail message.

     *

     * @param message the detail message

     */

    public KeySelectorException(String message) {

        super(message);

    }

    /**

     * Constructs a new {@code KeySelectorException} with the

     * specified detail message and cause.

     * <p>Note that the detail message associated with

     * {@code cause} is <i>not</i> automatically incorporated in

     * this exception's detail message.

     *

     * @param message the detail message

     * @param cause the cause (A {@code null} value is permitted, and

     *        indicates that the cause is nonexistent or unknown.)

     */

    public KeySelectorException(String message, Throwable cause) {

        super(message);

        this.cause = cause;

    }

    /**

     * Constructs a new {@code KeySelectorException} with the specified

     * cause and a detail message of

     * {@code (cause==null ? null : cause.toString())}

     * (which typically contains the class and detail message of

     * {@code cause}).

     *

     * @param cause the cause (A {@code null} value is permitted, and

     *        indicates that the cause is nonexistent or unknown.)

     */

    public KeySelectorException(Throwable cause) {

        super(cause==null ? null : cause.toString());

        this.cause = cause;

    }

    /**

     * Returns the cause of this {@code KeySelectorException} or

     * {@code null} if the cause is nonexistent or unknown.  (The

     * cause is the throwable that caused this

     * {@code KeySelectorException} to get thrown.)

     *

     * @return the cause of this {@code KeySelectorException} or

     *         {@code null} if the cause is nonexistent or unknown.

     */

    public Throwable getCause() {

        return cause;

    }

    /**

     * Prints this {@code KeySelectorException}, its backtrace and

     * the cause's backtrace to the standard error stream.

     */

    public void printStackTrace() {

        super.printStackTrace();

        //XXX print backtrace of cause

    }

    /**

     * Prints this {@code KeySelectorException}, its backtrace and

     * the cause's backtrace to the specified print stream.

     *

     * @param s {@code PrintStream} to use for output

     */

    public void printStackTrace(PrintStream s) {

        super.printStackTrace(s);

        //XXX print backtrace of cause

    }

    /**

     * Prints this {@code KeySelectorException}, its backtrace and

     * the cause's backtrace to the specified print writer.

     *

     * @param s {@code PrintWriter} to use for output

     */

    public void printStackTrace(PrintWriter s) {

        super.printStackTrace(s);

        //XXX print backtrace of cause

    }

}