| /* |
| * 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.layout.renderer.aspect.impl; |
| |
| import java.util.ArrayList; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Map; |
| |
| import org.apache.cocoon.environment.ObjectModelHelper; |
| import org.apache.cocoon.environment.Request; |
| import org.apache.cocoon.environment.Session; |
| import org.apache.cocoon.portal.PortalService; |
| import org.apache.cocoon.portal.acting.helpers.LayoutEventDescription; |
| import org.apache.cocoon.portal.coplet.CopletInstanceData; |
| import org.apache.cocoon.portal.layout.Layout; |
| import org.apache.cocoon.portal.layout.impl.CopletLayout; |
| import org.apache.cocoon.portal.layout.renderer.aspect.RendererAspectContext; |
| import org.xml.sax.ContentHandler; |
| import org.xml.sax.SAXException; |
| |
| |
| /** |
| * Save the current state of the layout into the session |
| * |
| * @author <a href="mailto:cziegeler@s-und-n.de">Carsten Ziegeler</a> |
| * |
| * @version CVS $Id: HistoryAspect.java,v 1.3 2004/03/05 13:02:13 bdelacretaz Exp $ |
| */ |
| public class HistoryAspect |
| extends AbstractAspect { |
| |
| /** |
| * Add the values to the state |
| * @param id |
| * @param state |
| * @param values |
| */ |
| protected void addValues(String id, List state, Map values, String prefix) { |
| final Iterator iter = values.entrySet().iterator(); |
| while ( iter.hasNext() ) { |
| final Map.Entry entry = (Map.Entry)iter.next(); |
| final String path = prefix + entry.getKey(); |
| LayoutEventDescription led = new LayoutEventDescription(); |
| led.path = path; |
| led.layoutId = id; |
| led.data = entry.getValue(); |
| state.add(led); |
| } |
| } |
| |
| /* (non-Javadoc) |
| * @see org.apache.cocoon.portal.layout.renderer.aspect.RendererAspect#toSAX(org.apache.cocoon.portal.layout.renderer.aspect.RendererAspectContext, org.apache.cocoon.portal.layout.Layout, org.apache.cocoon.portal.PortalService, org.xml.sax.ContentHandler) |
| */ |
| public void toSAX(RendererAspectContext context, |
| Layout layout, |
| PortalService service, |
| ContentHandler handler) |
| throws SAXException { |
| if ( layout.getId() != null ) { |
| final Request request = ObjectModelHelper.getRequest(context.getObjectModel()); |
| final Session session = request.getSession(false); |
| if ( session != null ) { |
| List history = (List)session.getAttribute("portal-history"); |
| if ( history == null ) { |
| |
| history = new ArrayList(); |
| } |
| List state = (List)request.getAttribute("portal-history"); |
| if ( state == null ) { |
| state = new ArrayList(); |
| request.setAttribute("portal-history", state); |
| history.add(state); |
| } |
| |
| this.addValues(layout.getId(), state, layout.getAspectDatas(), "aspectDatas/"); |
| this.addValues(layout.getId(), state, layout.getParameters(), "parameters/"); |
| |
| // are we a coplet layout |
| if ( layout instanceof CopletLayout ) { |
| CopletInstanceData cid = ((CopletLayout)layout).getCopletInstanceData(); |
| this.addValues(cid.getId(), state, cid.getAspectDatas(), "aspectDatas/"); |
| this.addValues(cid.getId(), state, cid.getAttributes(), "attributes/"); |
| } |
| session.setAttribute("portal-history", history); |
| } |
| } |
| context.invokeNext(layout, service, handler); |
| } |
| |
| } |