/*
* Copyright 2002-2016 the original author or authors.
*
* 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.springframework.web.socket.handler;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.BeanFactoryAware;
import org.springframework.beans.factory.config.AutowireCapableBeanFactory;
import org.springframework.util.Assert;
/**
* Instantiates a target handler through a Spring {@link BeanFactory} and also provides
* an equivalent destroy method. Mainly for internal use to assist with initializing and
* destroying handlers with per-connection lifecycle.
*
* @author Rossen Stoyanchev
* @since 4.0
*/
public class BeanCreatingHandlerProvider<T> implements BeanFactoryAware {
private final Class<? extends T> handlerType;
private AutowireCapableBeanFactory beanFactory;
public BeanCreatingHandlerProvider(Class<? extends T> handlerType) {
Assert.notNull(handlerType, "handlerType must not be null");
this.handlerType = handlerType;
}
@Override
public void setBeanFactory(BeanFactory beanFactory) {
if (beanFactory instanceof AutowireCapableBeanFactory) {
this.beanFactory = (AutowireCapableBeanFactory) beanFactory;
}
}
public void destroy(T handler) {
if (this.beanFactory != null) {
this.beanFactory.destroyBean(handler);
}
}
public Class<? extends T> getHandlerType() {
return this.handlerType;
}
public T getHandler() {
if (this.beanFactory != null) {
return this.beanFactory.createBean(this.handlerType);
}
else {
return BeanUtils.instantiateClass(this.handlerType);
}
}
@Override
public String toString() {
return "BeanCreatingHandlerProvider[handlerType=" + this.handlerType + "]";
}
}