001    /*--------------------------------------------------------------------------+
002    $Id: RethrowingExceptionHandler.java 26283 2010-02-18 11:18:57Z juergens $
003    |                                                                          |
004    | Copyright 2005-2010 Technische Universitaet Muenchen                     |
005    |                                                                          |
006    | Licensed under the Apache License, Version 2.0 (the "License");          |
007    | you may not use this file except in compliance with the License.         |
008    | You may obtain a copy of the License at                                  |
009    |                                                                          |
010    |    http://www.apache.org/licenses/LICENSE-2.0                            |
011    |                                                                          |
012    | Unless required by applicable law or agreed to in writing, software      |
013    | distributed under the License is distributed on an "AS IS" BASIS,        |
014    | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
015    | See the License for the specific language governing permissions and      |
016    | limitations under the License.                                           |
017    +--------------------------------------------------------------------------*/
018    package edu.tum.cs.commons.error;
019    
020    /**
021     * An exception handler simply rethrowing the exception caught.
022     * 
023     * @author hummelb
024     * @author $Author: juergens $
025     * @version $Rev: 26283 $
026     * @levd.rating GREEN Hash: 2ACD776D944D5964CC083EF8762615B6
027     */
028    public class RethrowingExceptionHandler<X extends Exception> implements
029                    IExceptionHandler<X, X> {
030    
031            /** Singleton instance. */
032            private static RethrowingExceptionHandler<Exception> INSTANCE = new RethrowingExceptionHandler<Exception>();
033    
034            /** Returns the singleton instance of this class. */
035            @SuppressWarnings("unchecked")
036            public static <X extends Exception> RethrowingExceptionHandler<X> getInstance() {
037                    return (RethrowingExceptionHandler<X>) INSTANCE;
038            }
039    
040            /** {@inheritDoc} */
041            public void handleException(X exception) throws X {
042                    throw exception;
043            }
044    }