001/*-------------------------------------------------------------------------+
002|                                                                          |
003| Copyright 2005-2011 The ConQAT Project                                   |
004|                                                                          |
005| Licensed under the Apache License, Version 2.0 (the "License");          |
006| you may not use this file except in compliance with the License.         |
007| You may obtain a copy of the License at                                  |
008|                                                                          |
009|    http://www.apache.org/licenses/LICENSE-2.0                            |
010|                                                                          |
011| Unless required by applicable law or agreed to in writing, software      |
012| distributed under the License is distributed on an "AS IS" BASIS,        |
013| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
014| See the License for the specific language governing permissions and      |
015| limitations under the License.                                           |
016+-------------------------------------------------------------------------*/
017package org.conqat.lib.commons.error;
018
019/**
020 * An exception handler simply rethrowing the exception caught.
021 * 
022 * @author hummelb
023 */
024public class RethrowingExceptionHandler<X extends Exception> implements IExceptionHandler<X, X> {
025
026        /** Singleton instance. */
027        private static RethrowingExceptionHandler<Exception> INSTANCE = new RethrowingExceptionHandler<Exception>();
028
029        /** Returns the singleton instance of this class. */
030        @SuppressWarnings("unchecked")
031        public static <X extends Exception> RethrowingExceptionHandler<X> getInstance() {
032                return (RethrowingExceptionHandler<X>) INSTANCE;
033        }
034
035        /** {@inheritDoc} */
036        @Override
037        public void handleException(X exception) throws X {
038                throw exception;
039        }
040}