001 /**
002 *
003 * Licensed to the Apache Software Foundation (ASF) under one or more
004 * contributor license agreements. See the NOTICE file distributed with
005 * this work for additional information regarding copyright ownership.
006 * The ASF licenses this file to You under the Apache License, Version 2.0
007 * (the "License"); you may not use this file except in compliance with
008 * the License. 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 org.apache.camel.spring;
019
020 import org.apache.camel.spi.Injector;
021 import org.apache.camel.impl.ReflectionInjector;
022 import org.apache.commons.logging.Log;
023 import org.apache.commons.logging.LogFactory;
024 import org.springframework.context.ApplicationContext;
025
026 import java.util.Arrays;
027
028 /**
029 * A Spring implementation of {@link Injector} allowing Spring to be used to inject newly constructed type converters
030 *
031 * @version $Revision: 525537 $
032 */
033 public class SpringInjector extends ReflectionInjector {
034 private static final transient Log log = LogFactory.getLog(SpringInjector.class);
035 private final ApplicationContext applicationContext;
036
037 public SpringInjector(ApplicationContext applicationContext) {
038 this.applicationContext = applicationContext;
039 }
040
041 public Object newInstance(Class type) {
042 String[] names = applicationContext.getBeanNamesForType(type, true, true);
043 if (names != null) {
044 if (names.length == 1) {
045 // lets instantiate the single bean
046 return applicationContext.getBean(names[0]);
047 }
048 else if (names.length > 1) {
049 log.warn("Too many beans of type: " + type.getName() + " available: " + Arrays.asList(names) + " so ignoring Spring configuration");
050 }
051 }
052
053 // lets instantiate the bean
054 Object answer = super.newInstance(type);
055
056 // TODO now lets inject spring...
057 return answer;
058 }
059 }