/*
* Copyright 2004,2004 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.cocoon.portal.coplets.basket;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.util.Map;
import org.apache.avalon.framework.parameters.Parameters;
import org.apache.avalon.framework.service.ServiceException;
import org.apache.avalon.framework.service.ServiceManager;
import org.apache.cocoon.ProcessingException;
import org.apache.cocoon.components.source.SourceUtil;
import org.apache.cocoon.environment.ObjectModelHelper;
import org.apache.cocoon.environment.SourceResolver;
import org.apache.cocoon.generation.ServiceableGenerator;
import org.apache.cocoon.portal.Constants;
import org.apache.cocoon.portal.PortalService;
import org.apache.cocoon.portal.coplet.CopletInstanceData;
import org.apache.cocoon.xml.SaxBuffer;
import org.apache.cocoon.xml.XMLUtils;
import org.apache.excalibur.source.Source;
import org.apache.excalibur.xml.sax.SAXParser;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
/**
* This is a generator that display the content of one item
*
* @author <a href="mailto:cziegeler@apache.org">Carsten Ziegeler</a>
*
* @version CVS $Id: BasketContentGenerator.java,v 1.2 2004/03/05 13:02:11 bdelacretaz Exp $
*/
public class BasketContentGenerator
extends ServiceableGenerator {
/** This is the attribute name containing the content */
protected String attributeName;
/* (non-Javadoc)
* @see org.apache.avalon.framework.service.Serviceable#service(org.apache.avalon.framework.service.ServiceManager)
*/
public void service(ServiceManager manager) throws ServiceException {
super.service(manager);
}
/* (non-Javadoc)
* @see org.apache.cocoon.sitemap.SitemapModelComponent#setup(org.apache.cocoon.environment.SourceResolver, java.util.Map, java.lang.String, org.apache.avalon.framework.parameters.Parameters)
*/
public void setup(SourceResolver resolver,
Map objectModel,
String src,
Parameters par)
throws ProcessingException, SAXException, IOException {
super.setup(resolver, objectModel, src, par);
this.attributeName = par.getParameter("attribute-name", null);
}
/**
* Get the coplet associated with this pipeline
*/
protected CopletInstanceData getCopletInstanceData()
throws SAXException {
PortalService portalService = null;
try {
portalService = (PortalService)this.manager.lookup(PortalService.ROLE);
final Map context = (Map)objectModel.get(ObjectModelHelper.PARENT_CONTEXT);
String copletId = (String)context.get(Constants.COPLET_ID_KEY);
CopletInstanceData object = portalService.getComponentManager().getProfileManager().getCopletInstanceData( copletId );
if (object == null) {
throw new SAXException("Could not find coplet instance data for " + copletId);
}
return object;
} catch (ServiceException e) {
throw new SAXException("Error getting portal service.", e);
} finally {
this.manager.release( portalService );
}
}
/* (non-Javadoc)
* @see org.apache.cocoon.generation.Generator#generate()
*/
public void generate()
throws IOException, SAXException, ProcessingException {
boolean streamed = false;
SAXParser parser = null;
try {
parser = (SAXParser) this.manager.lookup(SAXParser.ROLE);
if ( this.attributeName != null ) {
CopletInstanceData cid = this.getCopletInstanceData();
byte[] content = (byte[])cid.getAttribute(this.attributeName);
if ( content == null ) {
this.xmlConsumer.startDocument();
XMLUtils.createElement(this.xmlConsumer, "p");
this.xmlConsumer.endDocument();
return;
}
try {
InputSource is = new InputSource(new ByteArrayInputStream(content));
SaxBuffer buffer = new SaxBuffer();
parser.parse(is, buffer);
streamed = true;
buffer.toSAX(this.xmlConsumer);
} catch (Exception ignore) {
// ignore
}
}
if ( !streamed ) {
Source source = null;
try {
source = this.resolver.resolveURI(this.source);
parser.parse(SourceUtil.getInputSource(source), this.xmlConsumer);
} finally {
this.resolver.release(source);
}
}
} catch (ServiceException se) {
throw new ProcessingException("Unable to lookup parser.", se);
} finally {
this.manager.release(parser);
}
}
}