/*
* JBoss, Home of Professional Open Source.
* Copyright 2006, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file 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.aspects.remoting;
import org.jboss.aop.joinpoint.Invocation;
import org.jboss.aop.joinpoint.InvocationBase;
import org.jboss.aop.metadata.MetaDataResolver;
import org.jboss.aop.metadata.SimpleMetaData;
/**
* Prepare Metadata to be marshalled across the wire.
* This interceptor iterates through an Invocation's
* metadata resolver list to pull out transportable
* metadata and stuff it into the invocation
*
* @author <a href="mailto:bill@jboss.org">Bill Burke</a>
* @version $Revision: 57186 $
*/
public class MergeMetaDataInterceptor implements org.jboss.aop.advice.Interceptor, java.io.Serializable
{
private static final long serialVersionUID = 2424149906770308705L;
public static final MergeMetaDataInterceptor singleton = new MergeMetaDataInterceptor();
public String getName() { return "MergeMetaDataInterceptor"; }
protected org.jboss.aop.metadata.SimpleMetaData merge(Invocation invocation, MetaDataResolver resolver, SimpleMetaData merged)
{
if (resolver == null) return merged;
org.jboss.aop.metadata.SimpleMetaData metadata = resolver.getAllMetaData(invocation);
if (metadata == null) return merged;
if (merged == null)
{
merged = new org.jboss.aop.metadata.SimpleMetaData();
}
merged.mergeIn(metadata);
return merged;
}
public Object invoke(Invocation invocation) throws Throwable
{
org.jboss.aop.metadata.SimpleMetaData merged = null;
merged = merge(invocation, ((InvocationBase)invocation).getInstanceResolver(), merged);
org.jboss.aop.metadata.MetaDataResolver threadMetaData = org.jboss.aop.metadata.ThreadMetaData.instance().getAllMetaData(invocation);
merged = merge(invocation, threadMetaData, merged);
if (merged != null)
{
// Invocation data should override all merged data
merged.mergeIn(invocation.getMetaData());
// replace invocation's metadata with merged
invocation.setMetaData(merged);
}
return invocation.invokeNext();
}
}
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