TreeTable - null bean

Question

I have page, where is TreeTable, which contains informations about included nodes - companies...Under the table is selectOneChoice component, which contains all others
companies, which arent included and addButton, whit wich can user add companies from not included (selectOneChoiceComponent) to TreeTable component...When i am entering
this site for first time and there are no included companies - treeTable is empty, there is no problem.I am adding some companies from selectOneChoice component - with
addButton to treeTable.then i am going out from this page without saving data.When i am entering this site second time - there are no included companies in treeTable,
it is ok, but when i try to add some company to treeTable with addButton, exception appears. When i remove treeTable binding, the problem disappears. It seems to be a problem with treeTable state?
editCalculationFourthSubview.jsp // editCalculation subview
  <af:treeTable value="#{editCalculationBean.treeNodesModel}" var="node" partialTriggers="addButton"
    inlineStyle="width:100%" binding="#{editCalculationBean.treeNodesTable}"
    expandAllEnabled="true" id="table" bandingInterval="1" banding="row" >
    <f:facet name="nodeStamp">
      <af:column>
        <f:facet name="header">
           <h:outputText value="#{res.level}"/>
        </f:facet>
        <af:objectImage width="16" height="16"
        source="/imageServlet?id=#{node.nodeLevel}&type=nodeLevel"/>
        <af:outputText value="#{node.name}" />
      </af:column>
    </f:facet>
    <af:column>
      <f:facet name="header">
        <h:outputText value="#{res.id}" />
      </f:facet>
      <h:outputText value="#{node.id}" />
    </af:column>
    <af:column formatType="icon">
      <f:facet name="header">
        <h:outputText value="#{res.included}" />
      </f:facet>
        <af:selectBooleanCheckbox value="#{node.include}" readOnly="false" autoSubmit="true"
        valueChangeListener="#{editCalculationBean.updateSelectedNodes}" />
    </af:column>
      </af:treeTable>
      <af:selectOneChoice id="selectNode"
        value="#{editCalculationBean.otherScopeNodeSelected}"
       partialTriggers="addButton">
        <f:selectItems value="#{editCalculationBean.otherNodesMap}" />
      </af:selectOneChoice>
    </afh:cellFormat>
    <afh:cellFormat>
      <af:commandButton id="addButton" text="#{res.add}"
        shortDesc="#{res.addToSelectedDescription}"
        action="#{editCalculationBean.addNodeToSelected}"
        />
...part of EditCalculationBean.java -> session scope
private List<ScopeNodeData> selectedAllScopeNodes, selectedRootScopeNodes, otherScopeNodes;
private TreeModel treeNodesModel;
private CoreTreeTable treeNodesTable;
public String getRequestCall() {
  initSubview();
private void initSubview() {
    List<GbcNode> nodes = serviceProvider.getNodeService().getAllNodes();
...initialize arrays
    List<GbcScopeNode> scopeNodes = serviceProvider.getScopesService().getGbcScopeNodes();
    for(GbcScopeNode sn:scopeNodes){
      scopeNodesData.add(new ScopeNodeData(sn.getIdNode().getId(), sn.getIdNode().getNameK(), true, sn.getIdNode().getIdNodeLevel().getId(), sn.getIdNode()));
    selectedRootScopeNodes = scopeNodesData;
    selectedAllScopeNodes = scopeNodesData;
    selectedAllScopeNodes = loadNodes();
    for(GbcNode n : nodes){
      Boolean included = false;
      for(ScopeNodeData snd:selectedAllScopeNodes){
        if(n.getId().equals(snd.getNode().getId())){
          included = true;
          break;
      if (!included){
        otherScopeNodes.add(new ScopeNodeData(n.getId(), n.getNameK(), false, n.getIdNodeLevel().getId(), n));
    otherScopeNodeSelected = otherScopeNodes.get(0).getId();
public void addNodeToTree(ScopeNodeData treeNode, List<ScopeNodeData> newSelectedScopeNodes){
  List<GbcNode> nodes = serviceProvider.getNodeService().getAllNodesById(treeNode.getNode().getId());
  boolean included;
  for(GbcNode node: nodes) {
    for(ScopeNodeData rootNode:selectedRootScopeNodes){
      if(rootNode.getNode().getId().equals(node.getId())){
        selectedRootScopeNodes.remove(rootNode);
        break;
    included = treeNode.getInclude();
    if(!included){
      for(ScopeNodeData ssnd : selectedAllScopeNodes){
        if(node.getId().equals(ssnd.getNode().getId())){
          included = ssnd.getInclude();
    ScopeNodeData childTreeNode = new ScopeNodeData(node.getId(), node.getNameK(), included, node.getIdNodeLevel().getId(), node);
    addNodeToTree(childTreeNode, newSelectedScopeNodes);
    newSelectedScopeNodes.add(childTreeNode);
    for(ScopeNodeData treeNodeData : treeNode.getChildNodes()){
      if(treeNodeData.getNode().getId().equals(childTreeNode.getNode().getId())) return;
    treeNode.addChildNode(childTreeNode);
public List<ScopeNodeData> loadNodes(){
    List<ScopeNodeData> treeNodes = new ArrayList<ScopeNodeData>();
    List<ScopeNodeData> newSelectedScopeNodes = new ArrayList<ScopeNodeData>();
    ScopeNodeData rootData = new ScopeNodeData(new Long(0), "Nodes", true, new Long(1), null);
    boolean included;
    for(ScopeNodeData rsnd : selectedRootScopeNodes){
      included = true;
      for(ScopeNodeData ssnd : selectedAllScopeNodes){
        if(rsnd.getNode().getId().equals(ssnd.getNode().getId())){
          included = ssnd.getInclude();
      rsnd.setInclude(included);
      addNodeToTree(rsnd, newSelectedScopeNodes);
      rootData.addChildNode(rsnd);
      newSelectedScopeNodes.add(rsnd);
   if(rootData.getChildNodes().size()>0){
      treeNodesModel = new ChildPropertyTreeModel(rootData, "childNodes");
    }else{
      treeNodesModel = new ChildPropertyTreeModel(treeNodes, "childNodes");
    return newSelectedScopeNodes;
public class ScopeNodeData{
...declarations
  private Collection<ScopeNodeData> childNodes;
  public ScopeNodeData(Long id, String name, Boolean include, Long nodeLevel, GbcNode node){
...initializations
    this.childNodes = new ArrayList<ScopeNodeData>();
... setters and getters
  public Collection<ScopeNodeData> getChildNodes(){
    return childNodes;
  public void setChildNodes(Collection<ScopeNodeData> childNodes){
    this.childNodes = childNodes;
public TreeModel getTreeNodesModel(){
  return treeNodesModel;
public List<ScopeNodeData> getSelectedScopeNodes(){
  return selectedAllScopeNodes;
public void setSelectedScopeNodes(List<ScopeNodeData> scopeNodes){
  this.selectedAllScopeNodes = scopeNodes;
public CoreTreeTable getTreeNodesTable(){
  return treeNodesTable;
public void setTreeNodesTable(CoreTreeTable treeNodesTable){
  this.treeNodesTable = treeNodesTable;
}Exc:
javax.faces.el.PropertyNotFoundException: Error testing property 'include' in bean of type null
at com.sun.faces.el.PropertyResolverImpl.isReadOnly(PropertyResolverImpl.java:274)

Answer 1

Hi,
what if you set the managed bean scope to session? Look as if the treetable and select list it populated by the bean. The exception seems to indicate a problem with a property it cannot find
Frank