/* ====================================================================
 * TeaServlet - Copyright (c) 1999-2000 Walt Disney Internet Group
 * ====================================================================
 * The Tea Software License, Version 1.1
 *
 * Copyright (c) 2000 Walt Disney Internet Group. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by the
 *        Walt Disney Internet Group (http://opensource.go.com/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Tea", "TeaServlet", "Kettle", "Trove" and "BeanDoc" must
 *    not be used to endorse or promote products derived from this
 *    software without prior written permission. For written
 *    permission, please contact opensource@dig.com.
 *
 * 5. Products derived from this software may not be called "Tea",
 *    "TeaServlet", "Kettle" or "Trove", nor may "Tea", "TeaServlet",
 *    "Kettle", "Trove" or "BeanDoc" appear in their name, without prior
 *    written permission of the Walt Disney Internet Group.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE WALT DISNEY INTERNET GROUP OR ITS
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 *
 * For more information about Tea, please see http://opensource.go.com/.
 */
package com.go.trove.util;

import java.io.PrintStream;
import java.io.PrintWriter;

/**
 * Applies the filter pattern to Exceptions.
 *
 * @author Scott Jappinen
 * @version <!--$$Revision: 1.1 $-->-<!--$$JustDate:--> 01/03/23 <!-- $-->
 */
public class FilterException extends Exception {

    private Throwable mRootCause;
    
    public FilterException() {
        super();
		mRootCause = null;
    }
    
    public FilterException(String message) {
        super(message);
		mRootCause = null;
    }
    
    protected FilterException(Throwable rootCause) {
        super(rootCause.getMessage());
        mRootCause = rootCause;
    }

    protected FilterException(String message, Throwable rootCause) {
        super(message);
        mRootCause = rootCause;
    }
    
    public String getMessage() {
        String result;
        if (mRootCause != null) {
            String msg = super.getMessage();
            if (msg != null) {
                result = super.getMessage() + ": " + mRootCause.getMessage();
            } else {
                result = mRootCause.getMessage();
            }
        } else {
            result = super.getMessage();
        }
        return result;
    }
    
    public void printStackTrace() {
        if (mRootCause != null) {
            System.err.println("Root cause: ");
            mRootCause.printStackTrace();
        } else {
            super.printStackTrace();			
        }
    }
    
    public void printStackTrace(PrintStream stream) {
        if (mRootCause != null) {
            stream.print("Root cause: ");
            mRootCause.printStackTrace(stream);
        } else {
            super.printStackTrace(stream);
        }
    }
    
    public void printStackTrace(PrintWriter writer) {
        if (mRootCause != null) {
            writer.print("Root cause: ");
            mRootCause.printStackTrace(writer);
        } else {
            super.printStackTrace(writer);
        }
    }
    
    public Throwable getRootCause() {
        return mRootCause;
    }	
}