001/*
002 *  Copyright 2011 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.skinfactory.generators;
017
018import java.io.IOException;
019import java.io.InputStream;
020import java.util.Map;
021
022import org.apache.avalon.framework.service.ServiceException;
023import org.apache.cocoon.ProcessingException;
024import org.apache.cocoon.environment.ObjectModelHelper;
025import org.apache.cocoon.generation.ServiceableGenerator;
026import org.apache.cocoon.xml.XMLUtils;
027import org.apache.excalibur.source.Source;
028import org.apache.excalibur.xml.sax.SAXParser;
029import org.xml.sax.InputSource;
030import org.xml.sax.SAXException;
031
032import org.ametys.core.util.IgnoreRootHandler;
033
034/**
035 * Generates the model file with the modifications
036 */
037public class ChangeModelHash extends ServiceableGenerator
038{
039    @Override
040    public void generate() throws IOException, SAXException, ProcessingException
041    {
042        contentHandler.startDocument();
043        XMLUtils.startElement(contentHandler, "CMS");
044        
045        Map parentContextParameters = (Map) objectModel.get(ObjectModelHelper.PARENT_CONTEXT);
046        if (parentContextParameters != null)
047        {
048            Source src = resolver.resolveURI((String) parentContextParameters.get("modelUri"));
049            SAXParser saxParser = null;
050            try (InputStream is = src.getInputStream())
051            {
052                saxParser = (SAXParser) manager.lookup(SAXParser.ROLE);
053                saxParser.parse(new InputSource(is), new IgnoreRootHandler(contentHandler));
054            }
055            catch (ServiceException e)
056            {
057                throw new ProcessingException("Unable to get a SAX parser.", e);
058            }
059            finally
060            {
061                resolver.release(src);
062                manager.release(saxParser);
063            }
064            
065            String hash = (String) parentContextParameters.get("hash");
066            XMLUtils.createElement(contentHandler, "hash", hash);
067        }
068        
069        XMLUtils.endElement(contentHandler, "CMS");
070        contentHandler.endDocument();
071        
072    }
073    
074}