create tree programmatically

[elf]

http://livedemo.exadel.com/richfaces-demo/richfaces/tree.jsf?tab=model&cid=3217852

Hi
According to this live demo I tried to create rich tree programmatically, but I do not know what should I use instead of

nodeSelectListener="#{simpleTreeBean.processSelection}"

Please help me, how I can programmatically assign nodeSelectListener to tree.
Thanks in advance.

[nbelaevski]

Hello,

You can find all necessary information in this class: org.richfaces.taglib.TreeListenersTagHandler

[elf]

Could you please provide me simple example how to use this class.
I can not find sample of using :(

[nbelaevski]

It's easy. applyMetadata() method does exactly what you have to do creating component programmatically:

return new Metadata() {
 public void applyMetadata(FaceletContext context, Object object) {
 MethodBinding binding = context.getFacesContext().getApplication().createMethodBinding(attribute.getValue(), new Class[] {NodeSelectedEvent.class});
 ((UIComponent) object).getAttributes().put(NODE_SELECT_LISTENER, binding);
 }
 };

[elf]

I am so sorry. How can I use your example with my code. Please help me.

HtmlTree tree = new HtmlTree();
tree.setId("MenuTreeId");
tree.setSwitchType("client");
tree.setStyle("min-height:100%; min-width:100%; width:100%");
tree.setReRender("selectedNode");
tree.setValueExpression("value", eF.createValueExpression(eC, "#{treebean.treeNode}", TreeNode.class) );

[nbelaevski]

No problem. Try this:

tree.getAttributes().put("nodeSelectListener", context.getFacesContext().getApplication().createMethodBinding("#{bean.method}", new Class[] {NodeSelectedEvent.class}));

[elf]

Please help me. What is wrong in my code:

 tree.getAttributes().put("nodeSelectListener",
 eF.createMethodExpression(eC, "#{treebean.processSelection}",
 null, new Class[] {NodeSelectedEvent.class}));

and

 public void processSelection(NodeSelectedEvent event){

I have java.lang.reflect.InvocationTargetException: argument type mismatch.
What is the correct way to use this?
Thanks in advance.

[nbelaevski]

"nodeSelectListener" is of type MethodBinding and you use MethodExpression. Either switch to MethodBinding or create adaptor to adapt MethodExpression to FacesListener (see examples in JSF code) and use it.

[elf]

It looks like work with

FacesContext.getCurrentInstance().getApplication().createMethodBinding("#{"treebean.processSelection}", new Class[] {NodeSelectedEvent.class})

but FacesContext.getCurrentInstance().getApplication().createMethodBinding( is deprecated for my environment. Is it correct to use this code?

[nbelaevski]

"nbelaevski" wrote:
"... or create adaptor to adapt MethodExpression to FacesListener (see examples in JSF code) and use it.

MethodBidning is deprecated, but left for back compatibility. You can use JSF 1.2 approach described here, so that you won't need MethodBinding.

[elf]

Could you please post simple example here how I can do it.

[nbelaevski]

Take a look at sources of javax.faces.event.MethodExpressionActionListener. Just replace Action* stuff with NodeSelect* stuff. The add created listener using addNodeSelectListener()

[elf]

It works.
Thank you

[elf]

Is there way to put selection on particular node when tree is loading (loadTree method in livedemo http://livedemo.exadel.com/richfaces-demo/richfaces/tree.jsf?tab=model&cid=3587377) ?
May be I should bind my tree to request bean or something else ?