Desperately Seeking Tree Control Help
Okay,
After trying to duplicate the online examples of the tree control, I'm at a loss. I'm reasonably familiar with JSF/Richfaces but brand new to the tree control.
Very similar to the artist/album/singer online example, I have an analogous application/subcontext/exclude model.
The code executes on the ApplicationNode.getData (I've stepped through it with the debugger) but the tree is entirely empty when it renders.
Here's the relevant snippet from SimpleTreeNode:
public TreeNode getTreeNode() {
if (rootNode == null) {
loadTree();
}
return rootNode;
}
private void loadTree() {
List<ApplicationBean> list = activityService.getApplications();
rootNode = new TreeNodeImpl();
for (ApplicationBean bean : list) {
ApplicationNode node = new ApplicationNode(bean);
node.setParent(rootNode);
rootNode.addChild(bean.getApplicationId(), node);
}
}
And yes, the list IS populated when it comes back from the service call. All this seems reasonable so far.
Next is the def'n for my ApplicationNode:
public class ApplicationNode extends BaseTreeNode {
private static final long serialVersionUID = -4724947051841699837L;
private Map<Long, SubContextNode> children = new HashMap<Long, SubContextNode>();
public ApplicationNode(ApplicationBean bean) {
data = bean;
this.type="application";
}
public void addChild(Object key, TreeNode child) {
child.setParent(this);
children.put((Long)key, (SubContextNode) child);
}
public TreeNode getChild(Object key) {
return children.get(key);
}
public Iterator getChildren() {
return children.entrySet().iterator();
}
public TreeNode getParent() {
return null;
}
public boolean isLeaf() {
return false;
}
public void removeChild(Object key) {
this.children.remove(key);
}
public void setParent(TreeNode parent) {
}
public String toString() {
return ((ApplicationBean) data).getDescription();
}
}
and its base class, BaseTreeNode:
public abstract class BaseTreeNode implements TreeNode {
protected final Log logger = LogFactory.getLog(getClass());
protected Object data;
protected String type = "root";
public Object getData() {
return this;
}
public void setData(Object data) {
}
public void addChild(Object arg0, TreeNode arg1) {
throw new AbstractMethodError(this.getClass() + "addChild: Abstract Method Error");
}
public TreeNode getChild(Object arg0) {
throw new AbstractMethodError(this.getClass() + "getChild: Abstract Method Error");
}
public Iterator getChildren() {
throw new AbstractMethodError(this.getClass() + "getChildren: Abstract Method Error");
}
public boolean isLeaf() {
throw new AbstractMethodError(this.getClass() + "isLeaf: Abstract Method Error");
}
public void removeChild(Object arg0) {
throw new AbstractMethodError(this.getClass() + "removeChild: Abstract Method Error");
}
public TreeNode getParent() {
throw new AbstractMethodError(this.getClass() + "getParent: Abstract Method Error");
}
public void setParent(TreeNode arg0) {
throw new AbstractMethodError(this.getClass() + "setParent: Abstract Method Error");
}
public String getDisplayText() {
logger.info(data);
return toString();
}
public String getType() {
logger.info(this.type);
return this.type;
}
}
The other two Node types (SubContextNode & ExcludeNode) are essentially the same but return a different type.
Finally, my xhtml file:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core" xml:lang="en" lang="en"
xmlns:a4j="http://richfaces.org/a4j"
xmlns:rich="http://richfaces.org/rich">
<body>
<f:view>
<h:form>
<rich:tree id="objectTree" style="width:500px"
value="#{simpleTreeBean.treeNode}" var="item"
nodeFace="#{item.type}" >
<rich:treeNode type="application" icon="images/application.png" >
<h:outputText value="#{item.displayText}" />
</rich:treeNode>
<rich:treeNode type="subcontext" icon="images/subcontext.png">
<h:outputText value="#{item.displayText}" />
</rich:treeNode>
<rich:treeNode type="exclude" iconLeaf="images/exclude.png">
<h:outputText value="#{item.displayText}" />
</rich:treeNode>
</rich:tree>
</h:form>
</f:view>
</body>
</html>
So it all looks very similar to the posted demos, but alas with no tree nodes rendering. Can anyone point me in the right direction??? Thanks
-djh