001/*
002 *  Copyright 2010 Anyware Services
003 *
004 *  Licensed under the Apache License, Version 2.0 (the "License");
005 *  you may not use this file except in compliance with the License.
006 *  You may obtain a copy of the License at
007 *
008 *      http://www.apache.org/licenses/LICENSE-2.0
009 *
010 *  Unless required by applicable law or agreed to in writing, software
011 *  distributed under the License is distributed on an "AS IS" BASIS,
012 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 *  See the License for the specific language governing permissions and
014 *  limitations under the License.
015 */
016package org.ametys.web.repository.page.generators;
017
018import java.io.IOException;
019
020import org.apache.avalon.framework.service.ServiceException;
021import org.apache.avalon.framework.service.ServiceManager;
022import org.apache.cocoon.ProcessingException;
023import org.apache.cocoon.environment.ObjectModelHelper;
024import org.apache.cocoon.environment.Request;
025import org.apache.cocoon.generation.ServiceableGenerator;
026import org.apache.cocoon.xml.XMLUtils;
027import org.xml.sax.SAXException;
028
029import org.ametys.plugins.repository.AmetysObjectIterable;
030import org.ametys.plugins.repository.AmetysObjectResolver;
031import org.ametys.web.repository.page.Page;
032import org.ametys.web.repository.page.PagesContainer;
033
034/**
035 * SAX the child pages id of a page
036 */
037public class ChildrenPagesIdGenerator extends ServiceableGenerator
038{
039    /** Ametys object resolver. */
040    protected AmetysObjectResolver _resolver;
041    
042    @Override
043    public void service(ServiceManager serviceManager) throws ServiceException
044    {
045        super.service(serviceManager);
046        _resolver = (AmetysObjectResolver) serviceManager.lookup(AmetysObjectResolver.ROLE);
047    }
048    
049    @Override
050    public void generate() throws IOException, SAXException, ProcessingException
051    {
052        Request request = ObjectModelHelper.getRequest(objectModel);
053
054        String id = request.getParameter("id");
055        PagesContainer composite = _resolver.resolveById(id);
056        
057        contentHandler.startDocument();
058        XMLUtils.startElement(contentHandler, "child-pages");
059        
060        if (!(composite instanceof Page))
061        {
062            throw new IllegalArgumentException("Can not send page information on node '" + id + "', because it is a '" + composite.getClass() + "' that is not an instance of Page");
063        }
064        else
065        {
066            _saxChildPages ((Page) composite);
067        }
068
069        XMLUtils.endElement(contentHandler, "child-pages");
070        contentHandler.endDocument();
071    }
072    
073    
074    private void _saxChildPages (Page page) throws SAXException
075    {
076        AmetysObjectIterable<? extends Page> childPages = page.getChildrenPages();
077        
078        for (Page childPage : childPages)
079        {
080            XMLUtils.createElement(contentHandler, "page", childPage.getId());
081            _saxChildPages (childPage);
082        }
083    }
084
085}