// $Id: PersistenceException.java,v 1.2 2004/08/18 15:52:36 mvw Exp $
// Copyright (c) 1996-2003 The Regents of the University of California. All
// Rights Reserved. Permission to use, copy, modify, and distribute this
// software and its documentation without fee, and without a written
// agreement is hereby granted, provided that the above copyright notice
// and this paragraph appear in all copies.  This software program and
// documentation are copyrighted by The Regents of the University of
// California. The software program and documentation are supplied "AS
// IS", without any accompanying services from The Regents. The Regents
// does not warrant that the operation of the program will be
// uninterrupted or error-free. The end-user understands that the program
// was developed for research purposes and is advised not to rely
// exclusively on the program for any reason.  IN NO EVENT SHALL THE
// UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT,
// SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS,
// ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
// THE UNIVERSITY OF CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF
// SUCH DAMAGE. THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY
// WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE
// PROVIDED HEREUNDER IS ON AN "AS IS" BASIS, AND THE UNIVERSITY OF
// CALIFORNIA HAS NO OBLIGATIONS TO PROVIDE MAINTENANCE, SUPPORT,
// UPDATES, ENHANCEMENTS, OR MODIFICATIONS.

package org.argouml.kernel;

/**
 * An exception to be thrown by some persistence operation
 * @author Bob Tarling
 */
public class PersistenceException extends Exception {

    private Throwable cause = null;

    /**
     * Constructor
     */
    public PersistenceException() {
        super();
    }

    /**
     * Constructor 
     * @param message the message
     */
    public PersistenceException(String message) {
        super(message);
    }

    /**
     * @param message the message
     * @param c the cause of the exception
     */
    public PersistenceException(String message, Throwable c) {
        super(message);
        this.cause = c;
    }

    /**
     * @param c the cause of the exception
     */
    public PersistenceException(Throwable c) {
        super();
        this.cause = c;
    }

    /**
     * @see java.lang.Throwable#getCause()
     */
    public Throwable getCause() {
        return cause;
    }

    /**
     * @see java.lang.Throwable#printStackTrace()
     */
    public void printStackTrace() {
        super.printStackTrace();
        if (cause != null) {
            System.out.println("Caused by:");
            cause.printStackTrace();
        }
    }

    /**
     * @see java.lang.Throwable#printStackTrace(java.io.PrintStream)
     */
    public void printStackTrace(java.io.PrintStream ps)
    {
        super.printStackTrace(ps);
        if (cause != null) {
            ps.println("Caused by:");
            cause.printStackTrace(ps);
        }
    }

    /**
     * @see java.lang.Throwable#printStackTrace(java.io.PrintWriter)
     */
    public void printStackTrace(java.io.PrintWriter pw)
    {
        super.printStackTrace(pw);
        if (cause != null) {
            pw.println("Caused by:");
            cause.printStackTrace(pw);
        }
    }
}