AnnoInjectPostProcess.java

package org.theonefx.wcframework.ioc;

import java.lang.reflect.Field;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.theonefx.wcframework.core.ClassWrapper;
import org.theonefx.wcframework.ioc.annotation.Inject;
import org.theonefx.wcframework.utils.StringUtils;

/**
 * @File   		: AnnoInjectPostProcess.java
 * @ClassName   : AnnoInjectPostProcess 
 * @Author 		: 陈曦
 * @Date   		: 2012-2-10 下午01:51:59
 * @Version		: v1.0
 * @Description : 注解注入属性的bean处理器,也就是@Inject注解
 */
public class AnnoInjectPostProcess implements MergedBeanDefinitionPostProcessor {

	private final Log log = LogFactory.getLog(getClass());

	@Override
	public void postProcessMergedBeanDefinition(RootBeanDefinition beanDefinition, ClassWrapper<?> classWrapper, String id) {
		Field[] fields = classWrapper.getFields();
		for (Field field : fields) {
			Inject inject = field.getAnnotation(Inject.class);
			if (inject != null) {
				if (log.isDebugEnabled()) {
					log.debug("发现Inject于属性:" + field.getName() + "@Class:" + classWrapper.getWrapperedClass().getName());
				}
				//只有在不包含propertyValue的情况下才注入，如果已经有了propertyValue那么就跳过了，这种情况会出现在使用了<bean>定义了一个bean，同时又使用了@Inject注解的情况
				if (!beanDefinition.getPropertyValues().contains(field.getName())) {
					String valueTxt = inject.value();
					Object value = null;
					if (StringUtils.isNotBlank(valueTxt)) {
						value = new RuntimeBeanReference(valueTxt);
					} else {
						value = new AutoFoundRuntimeBeanReference(field.getName(), field.getType());
					}

					PropertyValue pv = new PropertyValue(field.getName(), value);
					beanDefinition.getPropertyValues().addPropertyValue(pv);
				}
			}
		}
	}
}