Programatically creating ADF Tree with nodes,child nodes & links?

Question

Hi,
Currently I am using Build JDEVADF_11.1.1.3.PS2_GENERIC_100408.2356.5660. Please provide me detailed code for programatically creating ADF Tree with nodes, child nodes and links in it.
Thanks,
Vik

Answer 1

You need to create a model for the tree. ADF has a build in model that you can use to build your own tree.
This is what you need to write in your JSPX:
<af:tree summary="Navigation" id="treeNav" value="#{pageFlowScope.treeNavigationBackingBean.model}"
           var="node" contextMenuSelect="true" rowSelection="single" fetchSize="30">   
       <f:facet name="nodeStamp">
      <af:outputText id="txtText" value="#{node.text}"/>
    </f:facet>
</af:tree>This is the code to retreive the model:
  public TreeModel getModel() {
    if(model == null)
        model = new ChildPropertyTreeModel(instance,"children");
    return model;
  }instance contains the actual tree. I build it in the constructor of my managed bean:
    public BeanTreeNavigation() {
      ArrayList<TreeItem> rootItems = new ArrayList<TreeItem>();
      TreeItem node1 = new TreeItem("Root node");
         ArrayList<TreeItem> level1 = new ArrayList<TreeItem>();
         TreeItem level1Node1 = new TreeItem("Level1 Node1");
          level1.add(level1Node1);
       node1.setChildren(level1);
       rootItems.setChildren(node1); 
      this.setListInstance(rootItems);
      root = rootItems;
  public void setListInstance(List instance) {
    this.instance = instance;
    model = null;
  }The TreeItem class is not a default one. I created it myself. You can make of it whatever you want:
    public class TreeItem {
      private String text;
       private List<TreeItem> children = null;
       public TreeItem(String text){
        this.text = text;
        public void setText(String text) {
            this.text = text;
        public String getText() {
            return text;
        public void setChildren(List<TreeItem> children) {
            this.children = children;
        public List<TreeItem> getChildren() {
            return children;
        }I wrote the TreeItem as an inner class of the managed bean.
The most important part is the getModel methode. There you need to specify an Object and the name of the getter that will return a List of the children.
Hope this helps.
Edited by: Yannick Ongena on Feb 22, 2011 7:30 AM