content: /* ========================================================================
   * JCommon : a free general purpose class library for the Java(tm) platform
   * ========================================================================
   *
   * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
   * 
   * Project Info:  http://www.jfree.org/jcommon/index.html
   *
   * This library is free software; you can redistribute it and/or modify it 
   * under the terms of the GNU Lesser General Public License as published by 
   * the Free Software Foundation; either version 2.1 of the License, or 
   * (at your option) any later version.
   *
   * This library 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 Lesser General Public 
   * License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, 
   * USA.  
   *
   * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
   * in the United States and other countries.]
   * 
   * ------------------------------
   * StackableRuntimeException.java
   * ------------------------------
   * (C)opyright 2002-2004, by Thomas Morgner and Contributors.
   *
   * Original Author:  Thomas Morgner;
   * Contributor(s):   David Gilbert (for Object Refinery Limited);
   *
   * $Id: StackableRuntimeException.java,v 1.3 2005/11/14 10:57:07 mungady Exp $
   *
   * Changes
   * -------
   * 06-Dec-2002 : Initial version
   * 10-Dec-2002 : Fixed issues reported by Checkstyle (DG);
   * 29-Apr-2003 : Distilled from the JFreeReport project and moved into JCommon
   *
   */
  
  package org.jfree.util;
  
  import java.io.PrintStream;
  import java.io.PrintWriter;
  
  /**
   * A baseclass for RuntimeExceptions, which could have parent exceptions. These parent exceptions
   * are raised in a subclass and are now wrapped into a subclass of this Exception.
   * <p>
   * The parents are printed when this exception is printed. This class exists mainly for
   * debugging reasons, as with them it is easier to detect the root cause of an error.
   *
   * @author Thomas Morgner
   */
  public class StackableRuntimeException extends RuntimeException {
  
      /** The parent exception. */
      private Exception parent;
  
      /**
       * Creates a StackableRuntimeException with no message and no parent.
       */
      public StackableRuntimeException() {
          super();
      }
  
      /**
       * Creates an exception.
       *
       * @param message  the exception message.
       * @param ex  the parent exception.
       */
      public StackableRuntimeException(final String message, final Exception ex) {
          super(message);
          this.parent = ex;
      }
  
      /**
       * Creates an exception.
       *
       * @param message  the exception message.
       */
      public StackableRuntimeException(final String message) {
          super(message);
      }
  
      /**
       * Returns the parent exception (possibly null).
       *
       * @return the parent exception.
       */
      public Exception getParent() {
          return this.parent;
      }
  
      /**
       * Prints the stack trace to the specified stream.
       *
       * @param stream  the output stream.
       */
      public void printStackTrace(final PrintStream stream) {
          super.printStackTrace(stream);
          if (getParent() != null) {
              stream.println("ParentException: ");
              getParent().printStackTrace(stream);
          }
      }
  
      /**
       * Prints the stack trace to the specified writer.
       *
       * @param writer  the writer.
       */
      public void printStackTrace(final PrintWriter writer) {
          super.printStackTrace(writer);
          if (getParent() != null) {
              writer.println("ParentException: ");
              getParent().printStackTrace(writer);
          }
      }
  
  }
  