commandButton reRender problem

[madman1]

I want select from java code the part of the page to reRender.

I have something like this:

<a4j:commandButton value="a" reRender="#{myBean.reRender}"/>

I read the tld doc of the commandButton, and iI find this:

commandButton:reRender:
Id['s] (in format of call UIComponent.findComponent()) of components, rendered in case of AjaxRequest caused by this component. Can be single id, comma-separated list of Id's, or EL Expression with array or Collection

And I tried this signatures for the method
myBean.getReRender();

 public String[] getReRender() {
 .......
 }

 public Object[] getReRender(){
 ......
 }

 public List getReRender(){
 .......
 }

 public List<String> getReRender(){
 ......
 }

But this methods never will be called. I don't know what is the problem.

What is the correct signature.

And something is important, this commandButton is inside a ModalPanel.[

[madman1]

I'm sorry, I fixed the problem.
Here are example:
http://livedemo.exadel.com/richfaces-demo/richfaces/ajaxAttributes.jsf?c=ajaxattributes

But was a problem in my code, I had:

DialogManager, with a list of dialogs:

<a4j:commandButton value="a" reRender="#{dialog.currentDialog.reRender}"/>

The problem was that in the action of the commandButton I deleted the current dialog, and so this don't work.