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.spring.spi;
018    
019    import java.util.Map;
020    
021    import org.apache.camel.NoSuchBeanException;
022    import org.apache.camel.spi.Registry;
023    import org.springframework.beans.factory.BeanNotOfRequiredTypeException;
024    import org.springframework.beans.factory.NoSuchBeanDefinitionException;
025    import org.springframework.context.ApplicationContext;
026    
027    /**
028     * A {@link Registry} implementation which looks up the objects in the Spring
029     * {@link ApplicationContext}
030     * 
031     * @version 
032     */
033    public class ApplicationContextRegistry implements Registry {
034        private ApplicationContext applicationContext;
035    
036        public ApplicationContextRegistry(ApplicationContext applicationContext) {
037            this.applicationContext = applicationContext;
038        }
039    
040        public <T> T lookup(String name, Class<T> type) {
041            Object answer;
042            try {
043                answer = applicationContext.getBean(name, type);
044            } catch (NoSuchBeanDefinitionException e) {
045                return null;
046            } catch (BeanNotOfRequiredTypeException e) {
047                return null;
048            }
049    
050            // just to be safe
051            if (answer == null) {
052                return null;
053            }
054    
055            try {
056                return type.cast(answer);
057            } catch (Throwable e) {
058                String msg = "Found bean: " + name + " in ApplicationContext: " + applicationContext
059                        + " of type: " + answer.getClass().getName() + " expected type was: " + type;
060                throw new NoSuchBeanException(name, msg, e);
061            }
062        }
063    
064        public Object lookup(String name) {
065            try {
066                return applicationContext.getBean(name);
067            } catch (NoSuchBeanDefinitionException e) {
068                return null;
069            }
070        }
071    
072        public <T> Map<String, T> lookupByType(Class<T> type) {
073            return applicationContext.getBeansOfType(type);
074        }
075    }