/*
* 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.impl;
import java.util.ArrayList;
import java.util.List;
import org.apache.avalon.framework.CascadingRuntimeException;
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.portal.PortalService;
import org.apache.cocoon.portal.event.Event;
import org.apache.cocoon.portal.event.EventConverter;
/**
*
* @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: DefaultEventConverter.java,v 1.4 2004/03/05 13:02:12 bdelacretaz Exp $
*/
public class DefaultEventConverter
extends AbstractLogEnabled
implements EventConverter, Serviceable, ThreadSafe {
protected static final String DECODE_LIST = DefaultEventConverter.class.getName() + "D";
protected static final String ENCODE_LIST = DefaultEventConverter.class.getName() + "E";
protected ServiceManager manager;
/* (non-Javadoc)
* @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.EventConverter#encode(org.apache.cocoon.portal.event.Event)
*/
public String encode(Event event) {
PortalService service = null;
try {
service = (PortalService)this.manager.lookup(PortalService.ROLE);
List list = (List)service.getAttribute(ENCODE_LIST);
if ( null == list ) {
list = new ArrayList();
service.setAttribute(ENCODE_LIST, list);
}
int index = list.indexOf(event);
if ( index == -1 ) {
list.add(event);
index = list.size() - 1;
}
return String.valueOf(index);
} catch (ServiceException ce) {
throw new CascadingRuntimeException("Unable to lookup component.", ce);
} finally {
this.manager.release(service);
}
}
/* (non-Javadoc)
* @see org.apache.cocoon.portal.event.EventConverter#decode(java.lang.String)
*/
public Event decode(String value) {
if (value != null) {
PortalService service = null;
try {
service = (PortalService)this.manager.lookup(PortalService.ROLE);
List list = (List)service.getAttribute(DECODE_LIST);
if ( null != list ) {
int index = new Integer(value).intValue();
if (index < list.size()) {
return (Event)list.get(index);
}
}
} catch (ServiceException ce) {
throw new CascadingRuntimeException("Unable to lookup component.", ce);
} finally {
this.manager.release(service);
}
}
return null;
}
/* (non-Javadoc)
* @see org.apache.cocoon.portal.event.EventConverter#start()
*/
public void start() {
PortalService service = null;
try {
service = (PortalService)this.manager.lookup(PortalService.ROLE);
List list = (List)service.getAttribute(ENCODE_LIST);
if ( null != list ) {
service.setAttribute(DECODE_LIST, list);
service.removeAttribute(ENCODE_LIST);
}
} catch (ServiceException ce) {
throw new CascadingRuntimeException("Unable to lookup component.", ce);
} finally {
this.manager.release(service);
}
}
/* (non-Javadoc)
* @see org.apache.cocoon.portal.event.EventConverter#finish()
*/
public void finish() {
PortalService service = null;
try {
service = (PortalService)this.manager.lookup(PortalService.ROLE);
service.removeAttribute(DECODE_LIST);
} catch (ServiceException ce) {
throw new CascadingRuntimeException("Unable to lookup component.", ce);
} finally {
this.manager.release(service);
}
}
}