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 static org.apache.camel.util.ObjectHelper.notNull; 021 022 import java.net.URI; 023 024 import org.apache.camel.CamelContext; 025 import org.apache.camel.Component; 026 import org.apache.camel.spi.ComponentResolver; 027 import org.springframework.context.ApplicationContext; 028 029 /** 030 * An implementation of {@link ComponentResolver} which tries to find a Camel {@link Component} 031 * in the Spring {@link ApplicationContext} first; if its not there it defaults to the auto-discovery mechanism. 032 * 033 * @version $Revision: 525634 $ 034 */ 035 public class SpringComponentResolver implements ComponentResolver { 036 private final ApplicationContext applicationContext; 037 private final ComponentResolver nextResolver; 038 039 public SpringComponentResolver(ApplicationContext applicationContext, ComponentResolver nextResolver) { 040 notNull(applicationContext, "applicationContext"); 041 this.applicationContext = applicationContext; 042 this.nextResolver = nextResolver; 043 } 044 045 public Component resolveComponent(String uri, CamelContext context) throws Exception { 046 String scheme = new URI(uri).getScheme(); 047 Object bean = applicationContext.getBean(scheme); 048 if (bean != null) { 049 if (bean instanceof Component) { 050 return (Component) bean; 051 } 052 else { 053 throw new IllegalArgumentException("Bean with name: " + bean + " in spring context is not a Component: " + bean); 054 } 055 } 056 if (nextResolver == null) { 057 return null; 058 } 059 return nextResolver.resolveComponent(uri, context); 060 } 061 }