/*
 * Copyright (c) 2010-2016. Axon Framework
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.axonframework.spring.saga;

import org.axonframework.eventhandling.saga.ResourceInjector;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.config.AutowireCapableBeanFactory;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;

/**
 * ResourceInjector implementation that injects Saga instances with resources available from the Spring Application
 * context the injector is registered in.
 * <p/>
 * Resources need to be annotated with a Spring-compatible auto-wiring annotation, such as {@link
 * org.springframework.beans.factory.annotation.Autowired @Autowired} or JSR-250's {@link javax.annotation.Resource}.
 * <p/>
 * Note: make sure that the Spring context also declares {@code <context:annotation-config />} or an
 * {@code AutowiredAnnotationBeanPostProcessor}. See the Spring documentation for more information.
 *
 * @author Allard Buijze
 * @since 0.7
 */
public class SpringResourceInjector implements ResourceInjector, ApplicationContextAware {

    private AutowireCapableBeanFactory autowireCapableBeanFactory;

    @Override
    public void injectResources(Object saga) {
        autowireCapableBeanFactory.autowireBeanProperties(saga, AutowireCapableBeanFactory.AUTOWIRE_NO, false);
    }

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        this.autowireCapableBeanFactory = applicationContext.getAutowireCapableBeanFactory();
    }
}