/*
* Created on Apr 29, 2005
*
* 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 @2005 the original author or authors.
*/
package org.springmodules.cache.annotations;
import static org.springframework.util.ObjectUtils.isEmpty;
import static org.springmodules.cache.interceptor.caching.CachingUtils.isCacheable;
import java.lang.annotation.Annotation;
import java.lang.reflect.Method;
import org.springmodules.cache.CacheAttribute;
import org.springmodules.cache.interceptor.MetadataCacheAttributeSource;
import org.springmodules.cache.interceptor.MetadataCacheAttributeSource.MetadataFinder;
import org.springmodules.cache.interceptor.caching.Cached;
import org.springmodules.cache.interceptor.caching.CachingAttributeSource;
/**
* Binds caching metadata annotations to methods.
*
* @author Alex Ruiz
*/
public class AnnotationCachingAttributeSource implements CachingAttributeSource {
private final MetadataFinder finder = new MetadataFinder() {
public CacheAttribute find(Method m) {
return find(m.getAnnotations());
}
private CacheAttribute attribute(Cacheable a) {
return new Cached(a.modelId());
}
private CacheAttribute find(Annotation[] annotations) {
if (isEmpty(annotations)) return null;
for (Annotation a : annotations)
if (a instanceof Cacheable) return attribute((Cacheable)a);
return null;
}
};
private final MetadataCacheAttributeSource source;
public AnnotationCachingAttributeSource() {
source = new MetadataCacheAttributeSource(finder);
}
public Cached attribute(Method m, Class t) {
if (isCacheable(m)) return (Cached)source.attribute(m, t);
return null;
}
}