/*
* Copyright 2000-2004 The Apache Software Foundation.
*
* 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.
*/
package org.apache.jetspeed.aggregator.impl;
import java.io.IOException;
import java.util.HashMap;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.jetspeed.PortalReservedParameters;
import org.apache.jetspeed.aggregator.PortletAggregator;
import org.apache.jetspeed.aggregator.PortletRenderer;
import org.apache.jetspeed.exception.JetspeedException;
import org.apache.jetspeed.om.page.ContentFragment;
import org.apache.jetspeed.om.page.ContentFragmentImpl;
import org.apache.jetspeed.om.page.Fragment;
import org.apache.jetspeed.request.RequestContext;
/**
* PortletAggregator builds the content required to render a single portlet.
*
* @author <a href="mailto:taylor@apache.org">David Sean Taylor</a>
* @version $Id: PortletAggregatorImpl.java 506339 2007-02-12 07:03:07Z taylor $
*/
public class PortletAggregatorImpl implements PortletAggregator
{
private final static Log log = LogFactory.getLog(PortletAggregatorImpl.class);
private PortletRenderer renderer;
public PortletAggregatorImpl(PortletRenderer renderer)
{
this.renderer = renderer;
}
/* (non-Javadoc)
* @see org.apache.jetspeed.aggregator.Aggregator#build(org.apache.jetspeed.request.RequestContext)
*/
public void build(RequestContext context) throws JetspeedException, IOException
{
// construct Fragment for rendering use with
// appropriate id to match portlet entity
String entity = context.getRequestParameter(PortalReservedParameters.PORTLET_ENTITY);
if (entity == null)
{
entity = (String)context.getAttribute(PortalReservedParameters.PORTLET_ENTITY);
}
if (entity == null)
{
return;
}
String name = context.getRequestParameter(PortalReservedParameters.PORTLET);
if (name == null)
{
name = (String)context.getAttribute(PortalReservedParameters.PORTLET);
}
if (name == null)
{
return;
}
Fragment fragment = context.getPage().getFragmentById(entity);
if (fragment == null)
{
fragment = new PortletAggregatorFragmentImpl(entity);
fragment.setType(Fragment.PORTLET);
fragment.setName(name);
}
ContentFragment contentFragment = new ContentFragmentImpl(fragment, new HashMap());
renderer.renderNow(contentFragment, context);
context.getResponse().getWriter().write(contentFragment.getRenderedContent());
}
}