Rich:tree and managing expand/collapse from first load

[Enrico Drusiani]

hello everyone!

I'm working on project based upon Seam 2.1.1 / Richfaces / Hibernate

i have to show in a rich:tree some entity bean wrappen in some utility classes. that's the easy part.

Now, i save the last used bean in order to load up the page with that information already there.
i'd like to have the tree expanded to that position as soon as the pages loads the first time.

i'm using switchType CLIENT because i needed as few calls as possible in order not to mess with the page general flow, so i'd like to stick with that, if possible.

here's some code.

 
					   		<rich:tree id="tree" 
					   				   	switchType="client" 
					   				   	value="#{backer.rootNode}"
					   				   	var="node"
					   				   	style="text-align:left;width:200px;"
					   				   	> 
            					<rich:treeNode>
            						<span style="white-space:normal;width:150px;">
                						<h:commandLink  id="linkedNode"
							        			   action="#{dirManager.onClickDirectory(node)}">
                							<h:outputText value="#{node.name}"/>
                						</h:commandLink>
                					</span>
            					</rich:treeNode>					   				   	
                   			</rich:tree>

this is the method i use to create the backer Bean

	@Factory("backer")
	public void fillTreeModel() {
		logger.info("### fillTreeModel factory called!");
		TreeNodeImpl<RichTreeBean> root=null;
		DirAut da=super.getDirAut();
		List<Directory> ld=null;
		
		try{
			if (backer==null)
				backer=new TreeBacker();
			
			root = new TreeNodeImpl<RichTreeBean>();
			RichTreeBean rootData = new RichTreeBean();
			rootData.setDir(null);
			rootData.setId(0L);
			rootData.setName("folder");
			rootData.setPath("\\");
			
			root.setData(rootData);
			
			backer.setRootNode(root);
			buildTree(null, root);
			
		}catch(Exception e){
			logger.error(e.getMessage(),e);
			errorDirFlag=true;
			if (e instanceof DirException)
				errorDirMes=messages.get(e.getMessage());
			else
				errorDirMes=messages.get(CoDTO.DIR_EXCEPTION_CLIENT_MSG_1);
		}
	}

and this is the method i use to fill the tree

private void buildTree(Directory d,TreeNode<RichTreeBean> treeNode){
		List<Directory> ld=null;
		
		try{
			boolean isRoot=false;
			if (d == null) {
				d = super.getDir().findRootDirectory();
				isRoot=true;
			}
			
			if (d != null) {
				logger.debug("### buildTree:isRoot="+isRoot);
				if (isRoot)
					ld=super.getDirAut().findReadableDirectories(d);
				else
					ld=d.getDirectories();
					
				if (d!=null && ld!=null){
					
					int beginIndex= isRoot ? 0 : d.getAbsolutePath().length();
					
					Iterator<Directory> i=ld.iterator();
					
					while (i.hasNext()){
					
						Directory dir = i.next();
						
						TreeNodeImpl<RichTreeBean> childNode = new TreeNodeImpl<RichTreeBean>();

						RichTreeBean childData = new RichTreeBean();
						childData.setDir(dir);
						childData.setId(dir.getId().longValue());
						childData.setName(dir.getNome());
						childData.setPath(dir.getAbsolutePath().substring(beginIndex));						
						
						childNode.setData(childData);
						treeNode.addChild(Long.toString(dir.getId().longValue()), childNode);
						
						buildTree(dir,childNode);
						
					}
				}
			}
		}catch(Exception e){
			logger.error(e.getMessage(),e);
			errorDirFlag=true;
			if (e instanceof DirException)
				errorDirMes=messages.get(e.getMessage());
			else
				errorDirMes=messages.get(CoDTO.DIR_EXCEPTION_CLIENT_MSG_1);
		}
	}

RichTreeBean is the utility class that wraps the entity and shows to the user some data.

i've tried to use adviseNodeOpened and changeExpandListener as suggested in other threads, but without success (that's why i cleaned them up).

Thanks for any suggestion and sorry for my bad English

Enrico.

[Enrico Drusiani]

i forgot to add i get an exception

10:17:25,890 ERROR [viewhandler] Error Rendering View[/modules/dir/main.xhtml]
java.lang.ClassCastException: org.richfaces.component.state.TreeState
	at org.richfaces.component.UITree.resetDataModel(UITree.java:388)
	at org.ajax4jsf.component.UIDataAdaptor.beforeRenderResponse(UIDataAdaptor.java:1633)
	at org.ajax4jsf.component.RenderPhaseUIDataAdaptorVisitor.beforeComponent(RenderPhaseUIDataAdaptorVisitor.java:44)
	at org.richfaces.event.RenderPhaseComponentListener.processComponents(RenderPhaseComponentListener.java:47)
	at org.richfaces.event.RenderPhaseComponentListener.processComponents(RenderPhaseComponentListener.java:55)
	at org.richfaces.event.RenderPhaseComponentListener.processComponents(RenderPhaseComponentListener.java:55)
	at org.richfaces.event.RenderPhaseComponentListener.processComponents(RenderPhaseComponentListener.java:55)
	at org.richfaces.event.RenderPhaseComponentListener.processComponents(RenderPhaseComponentListener.java:55)
	at org.richfaces.event.RenderPhaseComponentListener.processComponents(RenderPhaseComponentListener.java:55)
	at org.richfaces.event.RenderPhaseComponentListener.processComponents(RenderPhaseComponentListener.java:55)
	at org.richfaces.event.RenderPhaseComponentListener.beforePhase(RenderPhaseComponentListener.java:71)
	at org.ajax4jsf.component.AjaxViewRoot.processPhaseListeners(AjaxViewRoot.java:183)
	at org.ajax4jsf.component.AjaxViewRoot.encodeBegin(AjaxViewRoot.java:499)
	at javax.faces.component.UIComponent.encodeAll(UIComponent.java:934)
	at com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:592)
	at org.ajax4jsf.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:100)
	at org.ajax4jsf.application.AjaxViewHandler.renderView(AjaxViewHandler.java:176)
	at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:109)
	at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:100)
	at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139)
	at javax.faces.webapp.FacesServlet.service(FacesServlet.java:266)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83)
	at org.jboss.seam.web.IdentityFilter.doFilter(IdentityFilter.java:40)
	at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
	at org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:90)
	at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
	at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64)
	at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
	at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45)
	at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
	at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:178)
	at org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:290)
	at org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:388)
	at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:515)
	at org.jboss.seam.web.Ajax4jsfFilter.doFilter(Ajax4jsfFilter.java:56)
	at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
	at org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:58)
	at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
	at org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
	at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:182)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:432)
	at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
	at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446)
	at java.lang.Thread.run(Thread.java:595)