001 /**
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements. See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License. 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 */
017 package org.apache.camel.util;
018
019 import org.apache.camel.IsSingleton;
020 import org.apache.camel.spi.Injector;
021
022 /**
023 * A simple implementation of {@link Injector} which just uses reflection to
024 * instantiate new objects using their zero argument constructor. For more
025 * complex implementations try the Spring or Guice implementations.
026 *
027 * @version $Revision: 752893 $
028 */
029 public class ReflectionInjector implements Injector {
030
031 public <T> T newInstance(Class<T> type) {
032 return ObjectHelper.newInstance(type);
033 }
034
035 public <T> T newInstance(Class<T> type, Object instance) {
036 if (instance instanceof IsSingleton) {
037 boolean singleton = ((IsSingleton) instance).isSingleton();
038 if (singleton) {
039 return type.cast(instance);
040 }
041 }
042 return newInstance(type);
043 }
044 }