/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.cloudstack.spring.lifecycle;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.config.BeanPostProcessor;
/**
* This class provides a method to do basically the same as @Inject of a type, but
* it will only find the types in the current context and not the parent. This class
* should only be used for very specific Spring bootstrap logic. In general @Inject
* is infinitely better. Basically you need a very good reason to use this.
*
*/
public abstract class AbstractBeanCollector extends AbstractSmartLifeCycle implements BeanPostProcessor {
Class<?>[] typeClasses = new Class<?>[] {};
Map<Class<?>, Set<Object>> beans = new HashMap<Class<?>, Set<Object>>();
@Override
public int getPhase() {
return 2000;
}
@Override
public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
for (Class<?> typeClass : typeClasses) {
if (typeClass.isAssignableFrom(bean.getClass())) {
doPostProcessBeforeInitialization(bean, beanName);
break;
}
}
return bean;
}
protected void doPostProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
}
protected void doPostProcessAfterInitialization(Object bean, Class<?> typeClass, String beanName) throws BeansException {
Set<Object> beansOfType = beans.get(typeClass);
if (beansOfType == null) {
beansOfType = new HashSet<Object>();
beans.put(typeClass, beansOfType);
}
beansOfType.add(bean);
}
@Override
public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
for (Class<?> typeClass : typeClasses) {
if (typeClass.isAssignableFrom(bean.getClass())) {
doPostProcessAfterInitialization(bean, typeClass, beanName);
}
}
return bean;
}
protected <T> Set<T> getBeans(Class<T> typeClass) {
@SuppressWarnings("unchecked")
Set<T> result = (Set<T>)beans.get(typeClass);
if (result == null)
return Collections.emptySet();
return result;
}
public Class<?> getTypeClass() {
if (typeClasses == null || typeClasses.length == 0)
return null;
return typeClasses[0];
}
public void setTypeClass(Class<?> typeClass) {
this.typeClasses = new Class<?>[] {typeClass};
}
public Class<?>[] getTypeClasses() {
return typeClasses;
}
public void setTypeClasses(Class<?>[] typeClasses) {
this.typeClasses = typeClasses;
}
}