/*
* Copyright 2000-2001,2004 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.portal.portlets.viewprocessor;
// Jetspeed apis
import org.apache.jetspeed.portal.Portlet;
import org.apache.jetspeed.portal.PortletException;
// XML stuff
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
/**
* <p>Portlet which renders RDF Site Summary.</p>
* <p>This portlet uses XML stylesheet for transforming the RSS
* content into display markup depending on the MimeType requested
* by the user-agent</p>
* <p>It accepts the following parameters :
* <dl>
* <dt>itemDisplayed</dt>
* <dd>The number of items from the RSS file to display on screen. Default 15 for HTML, 5 for WML</dd>
* <dt>showDescription</dt>
* <dd>Should the portlet show the item descriptions. Must be true or false. Default: true for HTML, false for WML</dd>
* <dt>showTitle</dt>
* <dd>Should the portlet show the channel description. Must be true or false. Default: true for HTML, false for WML</dd>
* <dt>stylesheet[.<mime>]</dt>
* <dd>The stylesheet URL. If a mime-type is specified, the stylesheet
* is only used for this mime-type</dd>
* </dl>
*
* @author <A HREF="mailto:raphael@apache.org">Rapha謖 Luta</A>
* @version $Id: $
* @since 1.4b4
*/
public class RSSViewProcessor extends XSLViewProcessor
{
/**
* This method loads the init parameters and
* parse the document tied to this portlet
*
* @param portlet
* @exception PortletException
*/
public void init(Portlet portlet)
throws PortletException
{
super.init(portlet);
//Determine title and description for this portlet
String title = null;
String description = null;
//now find the channel node.
Node channel = null;
NodeList list = this.document.getElementsByTagName("channel");
if (list.getLength() != 1)
{
throw new PortletException(ERROR_NOT_VALID);
}
channel = list.item(0);
Node tn = getNode( channel, "title" );
if ( tn == null ) {
throw new PortletException( ERROR_NOT_VALID );
}
else
{
Node fc = tn.getFirstChild();
if (fc != null)
{
title = fc.getNodeValue();
}
}
Node dn = getNode( channel, "description" );
if ( dn != null )
{
Node fc = dn.getFirstChild();
if (fc != null)
{
description = fc.getNodeValue();
}
}
portlet.setTitle(title);
portlet.setDescription(description);
}
}