/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.event.aspect.impl;
import java.util.Iterator;
import org.apache.avalon.framework.activity.Disposable;
import org.apache.avalon.framework.logger.AbstractLogEnabled;
import org.apache.avalon.framework.service.ServiceException;
import org.apache.avalon.framework.service.ServiceManager;
import org.apache.avalon.framework.service.Serviceable;
import org.apache.avalon.framework.thread.ThreadSafe;
import org.apache.cocoon.environment.ObjectModelHelper;
import org.apache.cocoon.environment.Request;
import org.apache.cocoon.portal.PortalService;
import org.apache.cocoon.portal.event.Event;
import org.apache.cocoon.portal.event.EventManager;
import org.apache.cocoon.portal.event.aspect.EventAspect;
import org.apache.cocoon.portal.event.aspect.EventAspectContext;
import org.apache.cocoon.portal.impl.PageLabelManager;
/**
* Converts links generated by the PageLabelLinkService into events and publishes them.
* Used in conjunction with the PageLabelLinkService, links generated from the layout
* portal.xml will be based upon the names of the named items.
*
* @author Ralph Goers
*
* @version CVS $Id: $
*/
public class PageLabelEventAspect
extends AbstractLogEnabled
implements EventAspect, ThreadSafe, Serviceable, Disposable {
protected ServiceManager manager;
protected PageLabelManager labelManager;
/**
* @see org.apache.avalon.framework.service.Serviceable#service(org.apache.avalon.framework.service.ServiceManager)
*/
public void service(ServiceManager manager) throws ServiceException {
this.manager = manager;
if ( this.manager.hasService(PageLabelManager.ROLE ) ) {
this.labelManager = (PageLabelManager)manager.lookup(PageLabelManager.ROLE);
}
}
/**
* @see org.apache.avalon.framework.activity.Disposable#dispose()
*/
public void dispose() {
if (this.manager != null) {
if (this.labelManager != null) {
this.manager.release(this.labelManager);
this.labelManager = null;
}
this.manager = null;
}
}
/**
* @see org.apache.cocoon.portal.event.aspect.EventAspect#process(org.apache.cocoon.portal.event.aspect.EventAspectContext, org.apache.cocoon.portal.PortalService)
*/
public void process(EventAspectContext context, PortalService service) {
if (this.labelManager != null) {
final EventManager publisher = service.getComponentManager().getEventManager();
final Request request = ObjectModelHelper.getRequest(context.getObjectModel());
final String parameterName = this.labelManager.getRequestParameterName();
final boolean useUrlPath = this.labelManager.isUrlPath();
String label = (useUrlPath) ? request.getSitemapURI() : request.getParameter(parameterName);
// The pageLabel must be single valued
if (label != null) {
String previous = this.labelManager.getPreviousLabel();
if (previous != null && previous.equals(label) ) {
// Already on this page. Don't publish the pageLabel events
} else {
Iterator iter = this.labelManager.getPageLabelEvents(label).iterator();
// Publish all the events for this page label.
while (iter.hasNext()) {
Event event = (Event) iter.next();
publisher.send(event);
}
// return;
}
}
}
context.invokeNext( service );
}
}