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 org.apache.camel.IsSingleton;
020    import org.apache.camel.spi.Injector;
021    import org.springframework.beans.factory.config.AutowireCapableBeanFactory;
022    import org.springframework.context.ConfigurableApplicationContext;
023    
024    /**
025     * A Spring implementation of {@link Injector} allowing Spring to be used to dependency inject newly created POJOs
026     *
027     * @version $Revision: 752893 $
028     */
029    public class SpringInjector implements Injector {
030        private final ConfigurableApplicationContext applicationContext;
031        private int autowireMode = AutowireCapableBeanFactory.AUTOWIRE_CONSTRUCTOR;
032        private boolean dependencyCheck;
033    
034        public SpringInjector(ConfigurableApplicationContext applicationContext) {
035            this.applicationContext = applicationContext;
036        }
037    
038        public <T> T newInstance(Class<T> type) {
039            // TODO support annotations for mandatory injection points?
040            Object value = applicationContext.getBeanFactory().createBean(type, autowireMode, dependencyCheck);
041            return type.cast(value);
042        }
043    
044        public <T> T newInstance(Class<T> type, Object instance) {
045            if (instance instanceof IsSingleton) {
046                boolean singleton = ((IsSingleton) instance).isSingleton();
047                if (singleton) {
048                    return type.cast(instance);
049                }
050            }
051            return newInstance(type);
052        }
053    
054        public int getAutowireMode() {
055            return autowireMode;
056        }
057    
058        public void setAutowireMode(int autowireMode) {
059            this.autowireMode = autowireMode;
060        }
061    
062        public boolean isDependencyCheck() {
063            return dependencyCheck;
064        }
065    
066        public void setDependencyCheck(boolean dependencyCheck) {
067            this.dependencyCheck = dependencyCheck;
068        }
069    }