/*
* 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.event.aspect.impl;
import java.util.List;
import java.util.ArrayList;
import org.apache.avalon.framework.logger.AbstractLogEnabled;
import org.apache.avalon.framework.thread.ThreadSafe;
import org.apache.avalon.framework.service.Serviceable;
import org.apache.avalon.framework.service.ServiceManager;
import org.apache.avalon.framework.service.ServiceException;
import org.apache.avalon.framework.service.ServiceSelector;
import org.apache.avalon.framework.parameters.Parameters;
import org.apache.cocoon.environment.ObjectModelHelper;
import org.apache.cocoon.environment.Request;
import org.apache.cocoon.portal.PortalService;
import org.apache.cocoon.portal.LinkService;
import org.apache.cocoon.portal.event.Event;
import org.apache.cocoon.portal.event.ConvertableEventFactory;
import org.apache.cocoon.portal.event.ConvertableEvent;
import org.apache.cocoon.portal.event.aspect.EventAspect;
import org.apache.cocoon.portal.event.aspect.EventAspectContext;
import org.apache.excalibur.source.SourceUtil;
/**
* Process all convertable event request parameters, creating the events and saving
* them in request attributes for processing by EventAspects that follow.
*
* @author <a href="mailto:rgoers@apache.org">Ralph Goers</a>
* @version SVN $Id: $
*/
public class ConvertableEventAspect extends AbstractLogEnabled
implements EventAspect, ThreadSafe, Serviceable {
protected ServiceManager manager;
/**
* @see org.apache.avalon.framework.service.Serviceable#service(org.apache.avalon.framework.service.ServiceManager)
*/
public void service(ServiceManager manager) throws ServiceException {
this.manager = manager;
}
/* (non-Javadoc)
* @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) {
final Request request = ObjectModelHelper.getRequest(context.getObjectModel());
final Parameters config = context.getAspectParameters();
final String parameterName = config.getParameter("parameter-name",
LinkService.DEFAULT_CONVERTABLE_EVENT_PARAMETER_NAME);
String[] parm = request.getParameterValues(parameterName);
if (parm != null) {
for (int i=0; i < parm.length; ++i) {
int index = parm[i].indexOf('(');
if (index > 0 && parm[i].endsWith(")")) {
String eventKey = parm[i].substring(0, index);
String eventParm =
SourceUtil.decodePath(parm[i].substring(index+1, parm[i].length()-1));
Event event = getEvent(service, eventKey, eventParm);
String key = "org.apache.cocoon.portal." +
((ConvertableEvent)event).getRequestParameterName();
List list = (List)request.getAttribute(key);
if (list == null) {
list = new ArrayList();
}
list.add(event);
request.setAttribute(key, list);
}
}
}
context.invokeNext( service );
}
private ConvertableEvent getEvent(PortalService service, String factoryName, String eventData) {
ServiceSelector selector = null;
ConvertableEventFactory factory = null;
ConvertableEvent event;
try {
selector = (ServiceSelector) this.manager.lookup(ConvertableEventFactory.ROLE + "Selector");
factory = (ConvertableEventFactory) selector.select(factoryName);
event = factory.createEvent(service, eventData);
} catch (ServiceException ce) {
if (getLogger().isErrorEnabled()) {
getLogger().error("Unable to create event for " + factoryName +
" using " + eventData);
}
event = null;
} finally {
if (selector != null) {
selector.release(factory);
}
this.manager.release(selector);
}
return event;
}
}