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.component;
019    
020    import org.apache.camel.Endpoint;
021    import org.apache.camel.component.pojo.PojoEndpoint;
022    import org.apache.camel.impl.DefaultComponent;
023    import static org.apache.camel.util.ObjectHelper.notNull;
024    import org.springframework.beans.BeansException;
025    import org.springframework.context.ApplicationContext;
026    import org.springframework.context.ApplicationContextAware;
027    
028    import java.util.Map;
029    
030    /**
031     * An alternative to the <a href="http://activemq.apache.org/pojo.html">POJO Component</a>
032     * which implements the <a href="http://activemq.apache.org/bean.html">Bean Component</a>
033     * which will look up the URI in the Spring ApplicationContext and use that to handle message dispatching.
034     * 
035     * @version $Revision: 1.1 $
036     */
037    public class BeanComponent extends DefaultComponent implements ApplicationContextAware {
038        private ApplicationContext applicationContext;
039    
040        public BeanComponent() {
041        }
042    
043        public BeanComponent(ApplicationContext applicationContext) {
044            this.applicationContext = applicationContext;
045        }
046    
047        public ApplicationContext getApplicationContext() {
048            return applicationContext;
049        }
050    
051        public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
052            this.applicationContext = applicationContext;
053        }
054    
055        protected Endpoint createEndpoint(String uri, String remaining, Map parameters) throws Exception {
056            notNull(applicationContext, "applicationContext");
057            Object object = applicationContext.getBean(remaining);
058            if (object != null) {
059                return new PojoEndpoint(uri, this, object);
060            }
061            return null;
062        }
063    
064    }