/**
* Copyright 2012 Nikita Koksharov
*
* 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 com.corundumstudio.socketio.annotation;
import java.lang.annotation.Annotation;
import java.lang.reflect.Method;
import java.util.Arrays;
import java.util.List;
import java.util.concurrent.atomic.AtomicBoolean;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.config.BeanPostProcessor;
import org.springframework.util.ReflectionUtils;
import org.springframework.util.ReflectionUtils.MethodCallback;
import org.springframework.util.ReflectionUtils.MethodFilter;
import com.corundumstudio.socketio.SocketIOServer;
public class SpringAnnotationScanner implements BeanPostProcessor {
private final Logger log = LoggerFactory.getLogger(getClass());
private final List<Class<? extends Annotation>> annotations =
Arrays.asList(OnConnect.class, OnDisconnect.class, OnEvent.class);
private final SocketIOServer socketIOServer;
private Class originalBeanClass;
public SpringAnnotationScanner(SocketIOServer socketIOServer) {
super();
this.socketIOServer = socketIOServer;
}
@Override
public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
if (originalBeanClass != null) {
socketIOServer.addListeners(bean, originalBeanClass);
log.info("{} bean listeners added", beanName);
originalBeanClass = null;
}
return bean;
}
@Override
public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
final AtomicBoolean add = new AtomicBoolean();
ReflectionUtils.doWithMethods(bean.getClass(),
new MethodCallback() {
@Override
public void doWith(Method method) throws IllegalArgumentException,
IllegalAccessException {
add.set(true);
}
},
new MethodFilter() {
@Override
public boolean matches(Method method) {
for (Class<? extends Annotation> annotationClass : annotations) {
if (method.isAnnotationPresent(annotationClass)) {
return true;
}
}
return false;
}
});
if (add.get()) {
originalBeanClass = bean.getClass();
}
return bean;
}
}