rich:tree, Default Tree Model
smith123 Sep 22, 2008 6:15 PMI 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; } }