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.factory;
018
019import org.conqat.lib.commons.error.NeverThrownRuntimeException;
020
021/**
022 * A factory that forwards creation to its parameter.
023 * 
024 * @param <T>
025 *            Type that gets created by the factory.
026 * @param <X>
027 *            Exception that can get thrown during execution of the factory
028 *            method. If no exception is thrown, use
029 *            {@link NeverThrownRuntimeException}.
030 */
031public class ForwardingFactory<T, X extends Exception> implements IParameterizedFactory<T, IFactory<T, X>, X> {
032
033        /** Singleton instance. */
034        @SuppressWarnings("rawtypes")
035        public static final ForwardingFactory INSTANCE = new ForwardingFactory();
036
037        /** {@inheritDoc} */
038        @Override
039        public T create(IFactory<T, X> factory) throws X {
040                return factory.create();
041        }
042}