/*
* Copyright 1999-2002,2004 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.coplet.adapter.impl;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.apache.avalon.framework.activity.Disposable;
import org.apache.avalon.framework.activity.Initializable;
import org.apache.avalon.framework.context.Context;
import org.apache.avalon.framework.context.ContextException;
import org.apache.avalon.framework.context.Contextualizable;
import org.apache.avalon.framework.service.ServiceException;
import org.apache.avalon.framework.service.ServiceManager;
import org.apache.cocoon.ProcessingException;
import org.apache.cocoon.components.ContextHelper;
import org.apache.cocoon.components.notification.Notifying;
import org.apache.cocoon.components.notification.NotifyingBuilder;
import org.apache.cocoon.components.source.SourceUtil;
import org.apache.cocoon.environment.ObjectModelHelper;
import org.apache.cocoon.portal.Constants;
import org.apache.cocoon.portal.PortalService;
import org.apache.cocoon.portal.coplet.CopletInstanceData;
import org.apache.cocoon.portal.event.CopletInstanceEvent;
import org.apache.cocoon.portal.event.Event;
import org.apache.cocoon.portal.event.EventManager;
import org.apache.cocoon.portal.event.Filter;
import org.apache.cocoon.portal.event.Subscriber;
import org.apache.excalibur.source.Source;
import org.apache.excalibur.source.SourceResolver;
import org.xml.sax.ContentHandler;
import org.xml.sax.SAXException;
/**
* This is the adapter to use pipelines as coplets
*
* @author <a href="mailto:cziegeler@s-und-n.de">Carsten Ziegeler</a>
* @author <a href="mailto:volker.schmitt@basf-it-services.com">Volker Schmitt</a>
*
* @version CVS $Id: URICopletAdapter.java,v 1.14 2004/03/05 13:02:10 bdelacretaz Exp $
*/
public class URICopletAdapter
extends AbstractCopletAdapter
implements Disposable, Subscriber, Initializable, Contextualizable {
/** The source resolver */
protected SourceResolver resolver;
/** The application context */
protected Context context;
/* (non-Javadoc)
* @see org.apache.avalon.framework.context.Contextualizable#contextualize(org.apache.avalon.framework.context.Context)
*/
public void contextualize(Context context) throws ContextException {
this.context = context;
}
/* (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 );
this.resolver = (SourceResolver)this.manager.lookup(SourceResolver.ROLE);
}
public void streamContent(CopletInstanceData coplet, ContentHandler contentHandler)
throws SAXException {
final String uri = (String)coplet.getCopletData().getAttribute("uri");
if ( uri == null ) {
throw new SAXException("No URI for coplet data "+coplet.getCopletData().getId()+" found.");
}
this.streamContent( coplet, uri, contentHandler);
}
public void streamContent(final CopletInstanceData coplet,
final String uri,
final ContentHandler contentHandler)
throws SAXException {
Source copletSource = null;
PortalService portalService = null;
try {
if (uri.startsWith("cocoon:")) {
portalService = (PortalService)this.manager.lookup(PortalService.ROLE);
Boolean handlePars = (Boolean)this.getConfiguration( coplet, "handleParameters");
String sourceUri = uri;
if ( handlePars != null && handlePars.booleanValue() ) {
List list = (List) portalService.getTemporaryAttribute(URICopletAdapter.class.getName());
if ( list != null && list.contains( coplet )) {
// add parameters
if ( uri.startsWith("cocoon:raw:") ) {
sourceUri = "cocoon:" + uri.substring(11);
}
} else {
// remove parameters
if (!uri.startsWith("cocoon:raw:") ) {
sourceUri = "cocoon:raw:" + uri.substring(7);
}
}
}
HashMap par = new HashMap();
par.put(Constants.PORTAL_NAME_KEY, portalService.getPortalName());
par.put(Constants.COPLET_ID_KEY, coplet.getId());
copletSource = this.resolver.resolveURI(sourceUri, null, par);
} else {
copletSource = this.resolver.resolveURI(uri);
}
SourceUtil.toSAX(copletSource, contentHandler);
} catch (IOException ioe) {
throw new SAXException("IOException", ioe);
} catch (ProcessingException pe) {
throw new SAXException("ProcessingException", pe);
} catch (ServiceException ce) {
throw new SAXException("ComponentException", ce);
} finally {
this.resolver.release(copletSource);
this.manager.release(portalService);
}
}
/* (non-Javadoc)
* @see org.apache.avalon.framework.activity.Disposable#dispose()
*/
public void dispose() {
if ( this.manager != null ) {
EventManager eventManager = null;
try {
eventManager = (EventManager)this.manager.lookup(EventManager.ROLE);
eventManager.getRegister().unsubscribe( this );
} catch (Exception ignore) {
} finally {
this.manager.release( eventManager );
}
this.manager.release( this.resolver );
this.resolver = null;
this.manager = null;
}
}
/* (non-Javadoc)
* @see org.apache.cocoon.portal.event.Subscriber#getEventType()
*/
public Class getEventType() {
return CopletInstanceEvent.class;
}
/* (non-Javadoc)
* @see org.apache.cocoon.portal.event.Subscriber#getFilter()
*/
public Filter getFilter() {
return null;
}
/* (non-Javadoc)
* @see org.apache.cocoon.portal.event.Subscriber#inform(org.apache.cocoon.portal.event.Event)
*/
public void inform(Event e) {
CopletInstanceEvent event = (CopletInstanceEvent)e;
PortalService service = null;
try {
service = (PortalService)this.manager.lookup(PortalService.ROLE);
List list = (List)service.getTemporaryAttribute(URICopletAdapter.class.getName());
if ( list == null ) {
list = new ArrayList();
}
list.add(event.getTarget());
service.setTemporaryAttribute(URICopletAdapter.class.getName(), list);
} catch (ServiceException ignore ) {
} finally {
this.manager.release(service);
}
}
/* (non-Javadoc)
* @see org.apache.avalon.framework.activity.Initializable#initialize()
*/
public void initialize() throws Exception {
EventManager eventManager = null;
try {
eventManager = (EventManager)this.manager.lookup(EventManager.ROLE);
eventManager.getRegister().subscribe( this );
} finally {
this.manager.release( eventManager );
}
}
/**
* Render the error content for a coplet
* @param coplet The coplet instance data
* @param handler The content handler
* @param error The exception that occured
* @return True if the error content has been rendered, otherwise false
* @throws SAXException
*/
protected boolean renderErrorContent(CopletInstanceData coplet,
ContentHandler handler,
Exception error)
throws SAXException {
final String uri = (String) this.getConfiguration(coplet, "error-uri");
if ( uri != null ) {
// TODO - if an error occured for this coplet, remember this
// and use directly the error-uri from now on
if ( uri.startsWith("cocoon:") && error != null) {
// Create a Notifying
NotifyingBuilder notifyingBuilder = null;
Notifying currentNotifying = null;
try {
notifyingBuilder= (NotifyingBuilder)this.manager.lookup(NotifyingBuilder.ROLE);
currentNotifying = notifyingBuilder.build(this, error);
} catch (Exception ignore) {
} finally {
this.manager.release(notifyingBuilder);
}
final Map objectModel = ContextHelper.getObjectModel(this.context);
// Add it to the object model
if ( currentNotifying != null ) {
objectModel.put(org.apache.cocoon.Constants.NOTIFYING_OBJECT, currentNotifying);
objectModel.put(ObjectModelHelper.THROWABLE_OBJECT, error);
}
try {
this.streamContent( coplet, uri, handler);
} finally {
objectModel.remove(org.apache.cocoon.Constants.NOTIFYING_OBJECT);
objectModel.remove(ObjectModelHelper.THROWABLE_OBJECT);
}
}
this.streamContent( coplet, uri, handler);
return true;
}
return false;
}
}