/*
* Created on Mar 31, 2006
*
* 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.
*
* Copyright @2006 the original author or authors.
*/
package org.springmodules.cache.config;
import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.beans.factory.config.BeanDefinitionHolder;
import org.springframework.beans.factory.config.RuntimeBeanReference;
import org.springframework.beans.factory.support.AbstractBeanDefinition;
import org.springframework.beans.factory.support.BeanDefinitionRegistry;
import org.springframework.beans.factory.xml.ParserContext;
import org.springframework.util.ClassUtils;
import org.springmodules.cache.interceptor.caching.CachingListener;
/**
* <p>
* Default implementation of <code>{@link CachingListenerValidator}</code>.
* </p>
*
* @author Omar Irbouh
* @author Alex Ruiz
*/
public class CachingListenerValidatorImpl implements CachingListenerValidator {
/**
* @see CachingListenerValidator#validate(Object, int, ParserContext)
*/
public void validate(Object cachingListener, int index,
ParserContext parserContext) throws IllegalStateException {
BeanDefinitionRegistry registry = parserContext.getRegistry();
BeanDefinition beanDefinition = null;
if (cachingListener instanceof RuntimeBeanReference) {
String beanName = ((RuntimeBeanReference) cachingListener).getBeanName();
beanDefinition = registry.getBeanDefinition(beanName);
} else if (cachingListener instanceof BeanDefinitionHolder) {
beanDefinition = ((BeanDefinitionHolder) cachingListener)
.getBeanDefinition();
} else {
throw new IllegalStateException("The caching listener reference/holder ["
+ index + "] should be an instance of <"
+ RuntimeBeanReference.class.getName() + "> or <"
+ BeanDefinitionHolder.class.getName() + ">");
}
Class expectedClass = CachingListener.class;
Class actualClass = resolveBeanClass(beanDefinition);
if (!expectedClass.isAssignableFrom(actualClass)) {
throw new IllegalStateException("The caching listener [" + index
+ "] should be an instance of <" + expectedClass.getName() + ">");
}
}
/**
* Resolves class of a beanDefinition
* @param beanDefinition the bean definition
* @return class of the bean definition
* @throws IllegalStateException if the given bean definition class can not
* be resolved
* @see org.springframework.beans.factory.config.BeanDefinition#setBeanClassName(String)
* @see org.springframework.beans.factory.support.AbstractBeanDefinition#resolveBeanClass(ClassLoader)
*/
protected Class resolveBeanClass(BeanDefinition beanDefinition)
throws IllegalStateException {
try {
return ((AbstractBeanDefinition) beanDefinition)
.resolveBeanClass(ClassUtils.getDefaultClassLoader());
} catch (ClassNotFoundException e) {
throw new IllegalStateException("Could not resolve class ["
+ beanDefinition.getBeanClassName() + "] of caching listener");
}
}
}