/*
* JBoss, Home of Professional Open Source
* Copyright 2006, JBoss Inc., and individual contributors as indicated
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.kernel.plugins.annotations;
import java.lang.annotation.Annotation;
import java.lang.annotation.ElementType;
import java.util.Collections;
import java.util.List;
import java.util.Set;
import org.jboss.beans.metadata.plugins.AbstractBeanMetaData;
import org.jboss.beans.metadata.plugins.AbstractCallbackMetaData;
import org.jboss.beans.metadata.spi.BeanMetaData;
import org.jboss.beans.metadata.spi.CallbackMetaData;
import org.jboss.beans.metadata.spi.MetaDataVisitorNode;
import org.jboss.dependency.spi.CallbackItem;
import org.jboss.dependency.spi.DependencyInfo;
import org.jboss.kernel.spi.dependency.KernelControllerContext;
import org.jboss.reflect.spi.AnnotatedInfo;
/**
* Callback annotation plugin.
*
* @param <T> info type
* @param <C> annotation type
* @author <a href="mailto:ales.justin@jboss.com">Ales Justin</a>
*/
public abstract class CallbackAnnotationPlugin<T extends AnnotatedInfo, C extends Annotation> extends AbstractAnnotationPlugin<T, C>
{
protected CallbackAnnotationPlugin(Class<C> annotation)
{
super(annotation);
}
protected boolean isElementTypeSupported(ElementType type)
{
return ElementType.METHOD == type;
}
protected boolean isMetaDataAlreadyPresent(T info, C annotation, KernelControllerContext context)
{
DependencyInfo dependency = context.getDependencyInfo();
Set<CallbackItem<?>> callbacks = getCallbacks(dependency);
if (callbacks != null && callbacks.isEmpty() == false)
{
for(CallbackItem<?> ci : callbacks)
{
if (isEqual(info, ci))
return true;
}
}
return false;
}
/**
* Does callback item corespond to info instance.
*
* @param info the info
* @param ci the callback item
* @return true if callback matches info
*/
protected abstract boolean isEqual(T info, CallbackItem<?> ci);
/**
* Get the callbacks.
*
* @param dependency the dependency info
* @return set of callback items
*/
protected abstract Set<CallbackItem<?>> getCallbacks(DependencyInfo dependency);
protected List<? extends MetaDataVisitorNode> internalApplyAnnotation(T info, C annotation, BeanMetaData bmd)
{
AbstractBeanMetaData beanMetaData = checkIfNotAbstractBeanMetaDataSpecific(bmd);
List<CallbackMetaData> callbacks = getCallbacks(beanMetaData);
AbstractCallbackMetaData callback = createCallback(info, annotation);
callbacks.add(callback);
return Collections.singletonList(callback);
}
/**
* Create new CallbackMetaData instance.
*
* @param info the info
* @param annotation the annotation
* @return new CallbackMetaData instance
*/
protected abstract AbstractCallbackMetaData createCallback(T info, C annotation);
/**
* Apply additional information.
*
* @param callback the callback metadata
* @param info the info
*/
protected abstract void applyInfo(AbstractCallbackMetaData callback, T info);
/**
* Get the callback metadatas.
*
* @param beanMetaData the bean metadata
* @return list of callback metadatas
*/
protected abstract List<CallbackMetaData> getCallbacks(AbstractBeanMetaData beanMetaData);
}