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 */
017package org.apache.camel.spring.spi;
018
019import java.util.HashSet;
020import java.util.Map;
021import java.util.Set;
022
023import org.apache.camel.NoSuchBeanException;
024import org.apache.camel.spi.BeanRepository;
025import org.springframework.beans.factory.BeanFactoryUtils;
026import org.springframework.beans.factory.BeanNotOfRequiredTypeException;
027import org.springframework.beans.factory.NoSuchBeanDefinitionException;
028import org.springframework.context.ApplicationContext;
029
030/**
031 * A {@link BeanRepository} implementation which looks up the objects in the Spring {@link ApplicationContext}
032 */
033public class ApplicationContextBeanRepository implements BeanRepository {
034    private ApplicationContext applicationContext;
035
036    public ApplicationContextBeanRepository(ApplicationContext applicationContext) {
037        this.applicationContext = applicationContext;
038    }
039
040    @Override
041    public <T> T lookupByNameAndType(String name, Class<T> type) {
042        Object answer;
043        try {
044            if (applicationContext.containsBean(name)) {
045                answer = applicationContext.getBean(name, type);
046            } else {
047                return null;
048            }
049        } catch (NoSuchBeanDefinitionException e) {
050            return null;
051        } catch (BeanNotOfRequiredTypeException e) {
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    @Override
065    public Object lookupByName(String name) {
066        try {
067            if (applicationContext.containsBean(name)) {
068                return applicationContext.getBean(name);
069            } else {
070                return null;
071            }
072        } catch (NoSuchBeanDefinitionException e) {
073            return null;
074        }
075    }
076
077    @Override
078    public <T> Set<T> findByType(Class<T> type) {
079        Map<String, T> map = findByTypeWithName(type);
080        return new HashSet<>(map.values());
081    }
082
083    @Override
084    public <T> Map<String, T> findByTypeWithName(Class<T> type) {
085        return BeanFactoryUtils.beansOfTypeIncludingAncestors(applicationContext, type);
086    }
087
088}