1 Reply Latest reply on Sep 26, 2008 7:54 PM by smith123

rich:tree, Default Tree Model

smith123 Sep 22, 2008 6:15 PM

I just started using richfaces and jumped right into tree. I am trying to get the tree model example working, but it gives me an error. I really need to get this working, need desperate help on this. This is the link I am following
http://livedemo.exadel.com/richfaces-demo/richfaces/tree.jsf?tab=model

Immediate help appreciated,

error:
#{simpleTreeBean.treeNode}' Error reading 'treeNode' on type org.richfaces.SimpleTreeBean

stack Trace:
org.apache.jasper.JasperException: javax.servlet.ServletException: /pages/index4.jsp(25,4) '#{simpleTreeBean.treeNode}' Error reading 'treeNode' on type org.richfaces.SimpleTreeBean
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:521)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:397)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:336)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)

root cause

javax.servlet.ServletException: /pages/index4.jsp(25,4) '#{simpleTreeBean.treeNode}' Error reading 'treeNode' on type org.richfaces.SimpleTreeBean
javax.faces.webapp.FacesServlet.service(FacesServlet.java:277)
org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:177)
org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:267)
org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:380)
org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:507)
org.apache.jasper.runtime.PageContextImpl.doForward(PageContextImpl.java:694)
org.apache.jasper.runtime.PageContextImpl.forward(PageContextImpl.java:665)
org.apache.jsp.index_jsp._jspService(index_jsp.java:59)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:373)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:336)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)

root cause

org.apache.jasper.el.JspELException: /pages/index4.jsp(25,4) '#{simpleTreeBean.treeNode}' Error reading 'treeNode' on type org.richfaces.SimpleTreeBean
org.apache.jasper.el.JspValueExpression.getValue(JspValueExpression.java:107)
javax.faces.component.UIData.getValue(UIData.java:609)
org.ajax4jsf.component.UIDataAdaptor.getValue(UIDataAdaptor.java:1640)
org.richfaces.component.UITree.createDataModel(UITree.java:664)
org.ajax4jsf.component.UIDataAdaptor.getExtendedDataModel(UIDataAdaptor.java:621)
org.ajax4jsf.component.UIDataAdaptor.setRowKey(UIDataAdaptor.java:339)
org.richfaces.renderkit.TreeRendererBase.writeContent(TreeRendererBase.java:632)
org.richfaces.renderkit.TreeRendererBase.encodeChildren(TreeRendererBase.java:573)
javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:837)
com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.encodeRecursive(HtmlBasicRenderer.java:234)
com.sun.faces.renderkit.html_basic.GridRenderer.renderRow(GridRenderer.java:178)
com.sun.faces.renderkit.html_basic.GridRenderer.encodeChildren(GridRenderer.java:126)
javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:837)
javax.faces.component.UIComponent.encodeAll(UIComponent.java:936)
javax.faces.render.Renderer.encodeChildren(Renderer.java:148)
javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:837)
javax.faces.component.UIComponent.encodeAll(UIComponent.java:936)
javax.faces.component.UIComponent.encodeAll(UIComponent.java:942)
com.sun.faces.application.ViewHandlerImpl.doRenderView(ViewHandlerImpl.java:271)
com.sun.faces.application.ViewHandlerImpl.renderView(ViewHandlerImpl.java:202)
org.ajax4jsf.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:108)
org.ajax4jsf.application.AjaxViewHandler.renderView(AjaxViewHandler.java:196)
com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:109)
com.sun.faces.lifecycle.Phase.doPhase(Phase.java:100)
com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139)
javax.faces.webapp.FacesServlet.service(FacesServlet.java:266)
org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:177)
org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:267)
org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:380)
org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:507)
org.apache.jasper.runtime.PageContextImpl.doForward(PageContextImpl.java:694)
org.apache.jasper.runtime.PageContextImpl.forward(PageContextImpl.java:665)
org.apache.jsp.index_jsp._jspService(index_jsp.java:59)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:373)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:336)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)

root cause

java.lang.NullPointerException
java.util.Properties$LineReader.readLine(Unknown Source)
java.util.Properties.load0(Unknown Source)
java.util.Properties.load(Unknown Source)
org.richfaces.SimpleTreeBean.loadTree(SimpleTreeBean.java:56)
org.richfaces.SimpleTreeBean.getTreeNode(SimpleTreeBean.java:98)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
java.lang.reflect.Method.invoke(Unknown Source)
javax.el.BeanELResolver.getValue(BeanELResolver.java:62)
javax.el.CompositeELResolver.getValue(CompositeELResolver.java:53)
com.sun.faces.el.FacesCompositeELResolver.getValue(FacesCompositeELResolver.java:72)
org.apache.el.parser.AstValue.getValue(AstValue.java:97)
org.apache.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:186)
org.apache.jasper.el.JspValueExpression.getValue(JspValueExpression.java:101)
javax.faces.component.UIData.getValue(UIData.java:609)
org.ajax4jsf.component.UIDataAdaptor.getValue(UIDataAdaptor.java:1640)
org.richfaces.component.UITree.createDataModel(UITree.java:664)
org.ajax4jsf.component.UIDataAdaptor.getExtendedDataModel(UIDataAdaptor.java:621)
org.ajax4jsf.component.UIDataAdaptor.setRowKey(UIDataAdaptor.java:339)
org.richfaces.renderkit.TreeRendererBase.writeContent(TreeRendererBase.java:632)
org.richfaces.renderkit.TreeRendererBase.encodeChildren(TreeRendererBase.java:573)
javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:837)
com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.encodeRecursive(HtmlBasicRenderer.java:234)
com.sun.faces.renderkit.html_basic.GridRenderer.renderRow(GridRenderer.java:178)
com.sun.faces.renderkit.html_basic.GridRenderer.encodeChildren(GridRenderer.java:126)
javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:837)
javax.faces.component.UIComponent.encodeAll(UIComponent.java:936)
javax.faces.render.Renderer.encodeChildren(Renderer.java:148)
javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:837)
javax.faces.component.UIComponent.encodeAll(UIComponent.java:936)
javax.faces.component.UIComponent.encodeAll(UIComponent.java:942)
com.sun.faces.application.ViewHandlerImpl.doRenderView(ViewHandlerImpl.java:271)
com.sun.faces.application.ViewHandlerImpl.renderView(ViewHandlerImpl.java:202)
org.ajax4jsf.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:108)
org.ajax4jsf.application.AjaxViewHandler.renderView(AjaxViewHandler.java:196)
com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:109)
com.sun.faces.lifecycle.Phase.doPhase(Phase.java:100)
com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139)
javax.faces.webapp.FacesServlet.service(FacesServlet.java:266)
org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:177)
org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:267)
org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:380)
org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:507)
org.apache.jasper.runtime.PageContextImpl.doForward(PageContextImpl.java:694)
org.apache.jasper.runtime.PageContextImpl.forward(PageContextImpl.java:665)
org.apache.jsp.index_jsp._jspService(index_jsp.java:59)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:373)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:336)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)

index.jsp

<!-- DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
 "http://www.w3.org/TR/html4/loose.dtd"-->

<%@ taglib uri="http://java.sun.com/jsf/html" prefix="h" %>
<%@ taglib uri="http://java.sun.com/jsf/core" prefix="f"%>
<%@ taglib uri="http://richfaces.org/a4j" prefix="a4j" %>
<%@ taglib uri="http://richfaces.org/rich" prefix="dnd" %>
<%@ taglib uri="http://richfaces.org/rich" prefix="rich"%>


<html>
 <head>
 <title>Tree</title>

 </head>
 <body>
 <f:view>

 <h:form>

 <h:outputText value="Config Tree:" />

 <h:panelGrid columns="2" width="100" columnClasses="col1,col2">

 <rich:tree style="width:300px" nodeSelectListener="#{simpleTreeBean.processSelection}"
 reRender="selectedNode"
 ajaxSubmitSelection="true"
 switchType="client"
 value="#{simpleTreeBean.treeNode}"
 var="item">
 </rich:tree>

 <h:outputText escape="false" value="Selected Node: #{simpleTreeBean.nodeTitle}" id="selectedNode" />

 </h:panelGrid>

 </h:form>

 </f:view>

 </body>
</html>

SimpleTreeBean.java

package org.richfaces;

import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Properties;

import javax.faces.FacesException;
import javax.faces.component.UIComponent;
import javax.faces.context.ExternalContext;
import javax.faces.context.FacesContext;

import org.richfaces.component.UITree;
import org.richfaces.component.html.HtmlTree;
import org.richfaces.event.NodeSelectedEvent;
import org.richfaces.model.TreeNode;
import org.richfaces.model.TreeNodeImpl;

public class SimpleTreeBean {

 private TreeNode rootNode = null;
 private List<String> selectedNodeChildren = new ArrayList<String>();

 private String nodeTitle=null;
 private static final String DATA_PATH = "simple-tree-data.properties";

 private void addNodes(String path, TreeNode node, Properties properties) {
 boolean end = false;
 int counter = 1;

 while (!end) {
 String key = path != null ? path + '.' + counter : String.valueOf(counter);

 String value = properties.getProperty(key);
 if (value != null) {
 TreeNodeImpl nodeImpl = new TreeNodeImpl();
 nodeImpl.setData(value);
 node.addChild(new Integer(counter), nodeImpl);
 addNodes(key, nodeImpl, properties);
 counter++;
 } else {
 end = true;
 }
 }
 }

 private void loadTree() {
 FacesContext facesContext = FacesContext.getCurrentInstance();
 ExternalContext externalContext = facesContext.getExternalContext();
 InputStream dataStream = externalContext.getResourceAsStream(DATA_PATH);
 try {
 Properties properties = new Properties();
 properties.load(dataStream);

 rootNode = new TreeNodeImpl();
 addNodes(null, rootNode, properties);

 } catch (IOException e) {
 throw new FacesException(e.getMessage(), e);
 } finally {
 if (dataStream != null) {
 try {
 dataStream.close();
 } catch (IOException e) {
 externalContext.log(e.getMessage(), e);
 }
 }
 }
 }

 public void processSelection(NodeSelectedEvent event) {
 HtmlTree tree = (HtmlTree) event.getComponent();
 nodeTitle = (String) tree.getRowData();
 selectedNodeChildren.clear();
 TreeNode currentNode = tree.getModelTreeNode(tree.getRowKey());


 if (currentNode.isLeaf()){
 System.out.println("current tree node is a leaf");
 selectedNodeChildren.add((String)currentNode.getData());
 }else
 {
 System.out.println("current tree node is not a leaf");

 Iterator<Map.Entry<Object, TreeNode>> it = currentNode.getChildren();
 while (it!=null &&it.hasNext()) {
 Map.Entry<Object, TreeNode> entry = it.next();
 selectedNodeChildren.add(entry.getValue().getData().toString());
 }
 }
 }

 public TreeNode getTreeNode() {
 if (rootNode == null) {
 loadTree();
 }

 return rootNode;
 }

 public String getNodeTitle() {
 return nodeTitle;
 }

 public void setNodeTitle(String nodeTitle) {
 this.nodeTitle = nodeTitle;
 }
}

1. Re: rich:tree, Default Tree Model

smith123 Sep 26, 2008 7:54 PM (in response to smith123)

I got the code working, by doing the following. Hope it helps others looking for same answer and that's why forums helps us learning.

Make sure that the path of properties file is correct. I was using eclipse IDE. Hence DATA_PATH = "simple-tree-data.properties" must be DATA_PATH = "/simple-tree-data.properties" and drop the properties file under WEB-INF.
Actions