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    }