Tree Node ClassCastException

[zjda]

Hi, I used rich:recursiveTreeNodesAdaptor for my tree. However, I could not figure how to refresh the affected nodes since addComponentToAjaxRender method caused exceptions due to no row key.

Therefore, I create my class ObjectBeanNode:

 public class ObjectBeanNode implements TreeNode<ObjectBean> {
 private static final long serialVersionUID = -5498990493803705085L;
 private ObjectBean data = null;
 private TreeNode<ObjectBean> parent = null;
 private Map<Object, TreeNode<ObjectBean>> childrenMap = null;

 public ObjectBeanNode(ObjectBean data) {
 this.data = data;
 }

 public ObjectBeanNode(ObjectBean data, TreeNode<ObjectBean> parent) {
 this.data = data;
 this.parent = parent;
 }

 public ObjectBean getData() {
 return data;
 }

 public TreeNode<ObjectBean> getChild(Object identifier) {
 if (this.childrenMap == null) {
 this.loadChildren();
 }
 return childrenMap.get(identifier);
 }

 public void addChild(Object identifier, TreeNode<ObjectBean> child) {
 if (this.childrenMap == null) {
 this.loadChildren();
 }
 child.setParent(this);
 childrenMap.put(identifier, child);
 }

 public void removeChild(Object identifier) {
 if (this.childrenMap == null) {
 this.loadChildren();
 }
 TreeNode<ObjectBean> treeNode = (TreeNode<ObjectBean>) childrenMap.remove(identifier);
 if (treeNode != null) {
 treeNode.setParent(null);
 }
 }

 public void setData(ObjectBean data) {
 this.data = data;
 }

 public TreeNode<ObjectBean> getParent() {
 return parent;
 }

 public void setParent(TreeNode<ObjectBean> parent) {
 this.parent = parent;
 }

 public boolean isLeaf() {
 return !this.data.isCollectable();
 }

 @Override
 public Iterator<Entry<Object, TreeNode<ObjectBean>>> getChildren() {
 if (this.childrenMap == null) {
 this.loadChildren();
 }
 return this.childrenMap.entrySet().iterator();
 }

 public String getType() {
 return this.data.isCollectable() ? "node" : "item";
 }

 private void loadChildren() {
 try {
 this.childrenMap = new LinkedHashMap<Object, TreeNode<ObjectBean>>();
 ...
 } catch (ApiException e) {
 e.printStackTrace();
 }

 }

and use rich:tree as the following:

 <rich:tree id="navtree" value="#{navTree.root}" treeNodeVar="treeNode"
 var="item" switchType="ajax" reRender="mainFrame" ajaxSubmitSelection="true"
 nodeFace="#{treeNode.type}" dropListener="#{navTree.dropListener}">
 <rich:treeNode type="node" acceptedTypes="mitarbeiter" dropValue="#{treeNode}">
 <h:outputText value="#{item.name}" />
 </rich:treeNode>
 <rich:treeNode type="item" dragType="mitarbeiter" dragValue="#{treeNode}">
 <rich:dndParam name="label" type="drag">#{item}</rich:dndParam>
 <h:outputText value="#{item.name}" style="color:blue"/>
 </rich:treeNode>
 </rich:tree>

But, I get the exception:

java.lang.ClassCastException: ObjectBeanNode cannot be cast to javax.swing.tree.TreeNode org.richfaces.model.SwingTreeDataModel.setWrappedData(SwingTreeDataModel.java:66)
org.richfaces.component.UITree.createDataModel(UITree.java:692) org.ajax4jsf.component.UIDataAdaptor.getExtendedDataModel(UIDataAdaptor.java:621)
...

If I use the class in the Richface demo, the tree works fine. Could anyone tell me what causes the problem.

Thanks,
-ZJ

[zjda]

Never mind. I figured out that value attribute in rich:tree, which actually is root, is different from roots attribute in rich:recursiveTreeNodesAdaptor, which is the root children.

-ZJ