/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
*/
package org.apache.pluto.driver.services.container;
import java.io.Serializable;
import java.io.StringWriter;
import java.io.Writer;
import java.util.List;
import javax.portlet.Event;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBElement;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.namespace.QName;
import javax.xml.stream.FactoryConfigurationError;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.pluto.container.EventProvider;
import org.apache.pluto.container.PortletContainerException;
import org.apache.pluto.container.PortletWindow;
import org.apache.pluto.container.driver.PortletRegistryService;
import org.apache.pluto.container.om.portlet.EventDefinition;
import org.apache.pluto.container.om.portlet.EventDefinitionReference;
import org.apache.pluto.container.om.portlet.PortletApplicationDefinition;
import org.apache.pluto.driver.services.portal.PortletWindowConfig;
/**
* @version $Id: EventProviderImpl.java 948578 2010-05-26 20:41:14Z ate $
*/
public class EventProviderImpl implements EventProvider
{
/** Logger. */
private static final Logger LOG = LoggerFactory.getLogger(EventProviderImpl.class);
private PortletWindow portletWindow;
private PortletRegistryService portletRegistry;
public EventProviderImpl(PortletWindow portletWindow, PortletRegistryService portletRegistry)
{
this.portletWindow = portletWindow;
this.portletRegistry = portletRegistry;
}
@SuppressWarnings("unchecked")
public Event createEvent(QName qname, Serializable value) throws IllegalArgumentException
{
if (isDeclaredAsPublishingEvent(qname))
{
if (value != null && !isValueInstanceOfDefinedClass(qname, value))
{
throw new IllegalArgumentException("Payload class (" +
value.getClass().getCanonicalName() +
") does not have the right class, check your defined event types in portlet.xml.");
}
try
{
if (value == null)
{
return new EventImpl(qname, value);
}
else
{
ClassLoader cl = Thread.currentThread().getContextClassLoader();
Writer out = new StringWriter();
Class clazz = value.getClass();
try
{
Thread.currentThread().setContextClassLoader(this.getClass().getClassLoader());
JAXBContext jc = JAXBContext.newInstance(clazz);
Marshaller marshaller = jc.createMarshaller();
JAXBElement<Serializable> element = new JAXBElement<Serializable>(qname, clazz, value);
marshaller.marshal(element, out);
}
finally
{
Thread.currentThread().setContextClassLoader(cl);
}
return new EventImpl(qname, out.toString());
}
}
catch (JAXBException e)
{
// maybe there is no valid jaxb binding
// TODO wsrp:eventHandlingFailed
LOG.error("Event handling failed", e);
}
catch (FactoryConfigurationError e)
{
LOG.warn(e.getMessage(),e);
}
}
return null;
}
private boolean isDeclaredAsPublishingEvent(QName qname)
{
String applicationId = PortletWindowConfig.parseContextPath(portletWindow.getId().getStringId());
String applicationName = applicationId;
String portletName = PortletWindowConfig.parsePortletName(portletWindow.getId().getStringId());
List<? extends EventDefinitionReference> events = null;
try
{
events = portletRegistry.getPortlet(applicationName, portletName).getSupportedPublishingEvents();
}
catch (PortletContainerException e1)
{
e1.printStackTrace();
}
if (events != null)
{
String defaultNamespace = portletWindow.getPortletDefinition().getApplication()
.getDefaultNamespace();
for (EventDefinitionReference ref : events)
{
QName name = ref.getQualifiedName(defaultNamespace);
if (name == null)
{
continue;
}
if (qname.equals(name))
{
return true;
}
}
}
return false;
}
private boolean isValueInstanceOfDefinedClass(QName qname, Serializable value)
{
PortletApplicationDefinition app = portletWindow.getPortletDefinition().getApplication();
List<? extends EventDefinition> events = app.getEventDefinitions();
if (events != null)
{
for (EventDefinition def : events)
{
if (def.getQName() != null)
{
if (def.getQName().equals(qname))
{
return value.getClass().getName().equals(def.getValueType());
}
}
else
{
QName tmp = new QName(app.getDefaultNamespace(), def.getName());
if (tmp.equals(qname))
{
return value.getClass().getName().equals(def.getValueType());
}
}
}
}
// event not declared
return true;
}
}