For creating ADF tree component using managed bean:
- Create a object representing tree item & this will have references to its children.
public class TreeNode {
public TreeNode() {
super();
}
public TreeNode(int id, String name){
this.id = id;
this.name = name;
}
private int id;
private String name;
private List<TreeNode> childNodes;
...with getters & setters...
}
- Create and Populate objects representing tree item with data, i did that in constructor of managed bean. Managed bean can be registered in either adfc-config.xml or faces-config.xml.
public TreeBackingBean() {
rootNode = new TreeNode(1, "World");
TreeNode node2 = new TreeNode(2, "USA");
TreeNode node3 = new TreeNode(3, "India");
TreeNode node4 = new TreeNode(4, "Los Angeles");
TreeNode node5 = new TreeNode(5, "Delhi");
TreeNode node6 = new TreeNode(6, "Mumbai");
List<TreeNode> l1 = new ArrayList<TreeNode>();
l1.add(node2);
l1.add(node3);
rootNode.setChildNodes(l1);
List<TreeNode> l2 = new ArrayList<TreeNode>();
l2.add(node4);
node2.setChildNodes(l2);
List<TreeNode> l3 = new ArrayList<TreeNode>();
l3.add(node5);
l3.add(node6);
node3.setChildNodes(l3);
}
- Use following API to create TreeModel:
org.apache.myfaces.trinidad.model.TreeModel treeModel =
new org.apache.myfaces.trinidad.model.ChildPropertyTreeModel(objectOfNodeTreeItem, "childNodes");
Note: The second argument is String matching the property of objectOfTreeItem representing references to its children. If the name is mismatched, you will end up with "javax.el.PropertyNotFoundException" error.
- Bind the value of <af:tree> from page to above "treeModel" instance. Final result be like:
