/*

  * Licensed to the Apache Software Foundation (ASF) under one or more

  * contributor license agreements.  See the NOTICE file distributed with

  * this work for additional information regarding copyright ownership.

  * The ASF licenses this file to You under the Apache License, Version 2.0

  * (the "License"); you may not use this file except in compliance with

  * the License.  You may obtain a copy of the License at

  *

  *      http://www.apache.org/licenses/LICENSE-2.0

  *

  * Unless required by applicable law or agreed to in writing, software

  * distributed under the License is distributed on an "AS IS" BASIS,

  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

  * See the License for the specific language governing permissions and

  * limitations under the License.

  */

 package org.apache.commons.collections;

 import java.util.NoSuchElementException;

 /**

  * The BufferUnderflowException is used when the buffer is already empty.

  * <p>

  * NOTE: From version 3.0, this exception extends NoSuchElementException.

  * 

  * @since Commons Collections 2.1

  * @version $Revision: 555824 $ $Date: 2007-07-12 20:27:15 -0400 (Thu, 12 Jul 2007) $

  *

  * @author Avalon

  * @author Berin Loritsch

  * @author Jeff Turner

  * @author Paul Jack

  * @author Stephen Colebourne

  */

 public class BufferUnderflowException extends NoSuchElementException {

     /** The root cause throwable */

     private final Throwable throwable;

     /**

      * Constructs a new <code>BufferUnderflowException</code>.

      */

     public BufferUnderflowException() {

         super();

         throwable = null;

     }

     /** 

      * Construct a new <code>BufferUnderflowException</code>.

      * 

      * @param message  the detail message for this exception

      */

     public BufferUnderflowException(String message) {

         this(message, null);

     }

     /** 

      * Construct a new <code>BufferUnderflowException</code>.

      * 

      * @param message  the detail message for this exception

      * @param exception  the root cause of the exception

      */

     public BufferUnderflowException(String message, Throwable exception) {

         super(message);

         throwable = exception;

     }

     /**

      * Gets the root cause of the exception.

      *

      * @return the root cause

      */

     public final Throwable getCause() {

         return throwable;

     }

 }