/*
* JBoss, a division of Red Hat
* Copyright 2010, Red Hat Middleware, LLC, 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.gatein.wsrp.payload;
import org.gatein.common.logging.Logger;
import org.gatein.common.logging.LoggerFactory;
import org.gatein.pc.api.PortletInvokerException;
import org.gatein.pc.api.info.EventInfo;
import org.gatein.pc.api.info.EventingInfo;
import org.gatein.pc.api.info.PortletInfo;
import org.gatein.pc.api.invocation.EventInvocation;
import org.gatein.pc.api.invocation.PortletInvocation;
import org.gatein.pc.api.invocation.response.PortletInvocationResponse;
import org.gatein.pc.portlet.PortletInvokerInterceptor;
import org.gatein.pc.portlet.container.ContainerPortletInvoker;
import org.gatein.pc.portlet.container.PortletApplication;
import org.gatein.pc.portlet.container.PortletApplicationContext;
import org.gatein.pc.portlet.container.PortletContainer;
import org.gatein.pc.portlet.impl.info.ContainerTypeInfo;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBElement;
import javax.xml.bind.Unmarshaller;
import javax.xml.namespace.QName;
import java.io.Serializable;
import java.util.Map;
/**
* @author <a href="mailto:chris.laprun@jboss.com">Chris Laprun</a>
* @version $Revision$
*/
public class WSRPEventPayloadInterceptor extends PortletInvokerInterceptor
{
/** . */
private final static Logger log = LoggerFactory.getLogger(WSRPEventPayloadInterceptor.class);
public PortletInvocationResponse invoke(PortletInvocation invocation) throws IllegalArgumentException, PortletInvokerException
{
if (invocation instanceof EventInvocation)
{
EventInvocation eventInvocation = (EventInvocation)invocation;
Serializable srcPayload = eventInvocation.getPayload();
Serializable dstPayload = srcPayload;
if (srcPayload instanceof SerializablePayload)
{
PortletContainer container = (PortletContainer)invocation.getAttribute(ContainerPortletInvoker.PORTLET_CONTAINER);
String containerId = container.getId();
QName eventName = eventInvocation.getName();
boolean trace = log.isTraceEnabled();
// get the event metadata from the portlet metadata
PortletInfo info = container.getInfo();
EventingInfo eventingInfo = info.getEventing();
Map<QName, ? extends EventInfo> consumedEventInfos = eventingInfo.getConsumedEvents();
EventInfo eventInfo = consumedEventInfos.get(eventName);
Class dstPayloadClass;
if (eventInfo != null)
{
// get the type of the event
ContainerTypeInfo typeInfo = (ContainerTypeInfo)eventInfo.getType();
if (typeInfo != null)
{
// if we managed to get the event type information, try to unmarshall the event from the XML payload
dstPayloadClass = typeInfo.getType();
if (trace)
{
log.trace("Obtained for event " + eventName + " its payload class " + dstPayloadClass.getName() + " declared by the portlet meta data "
+ containerId);
}
// get the portlet application class loader so we can access the war classes
PortletApplication application = container.getPortletApplication();
PortletApplicationContext applicationContext = application.getContext();
ClassLoader loader = applicationContext.getClassLoader();
if (srcPayload instanceof SerializableSimplePayload)
{
dstPayload = ((SerializableSimplePayload)srcPayload).getPayload();
}
else
{
SerializablePayload scp = (SerializablePayload)srcPayload;
try
{
Class<? extends Serializable> clazz = loader.loadClass(dstPayloadClass.getName()).asSubclass(Serializable.class);
JAXBContext jaxbContext = JAXBContext.newInstance(clazz);
Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();
JAXBElement<? extends Serializable> result = unmarshaller.unmarshal(scp.getElement(), clazz);
dstPayload = result.getValue();
}
catch (Exception e)
{
throw new PortletInvokerException("Couldn't unmarshall event from payload!", e);
}
}
}
else
{
if (trace)
{
log.trace("No type declared for event " + eventName + " declared by the portlet meta data " + containerId);
}
}
}
}
// Set payload
eventInvocation.setPayload(dstPayload);
//
try
{
return super.invoke(invocation);
}
finally
{
eventInvocation.setPayload(srcPayload);
}
}
else
{
return super.invoke(invocation);
}
}
}