Wicket, Ajax and JSON

[Serban Balamaci]

Hello. I'm trying to create a wicket component out of FlexiGrid
http://www.flexigrid.info/ .

The javascript for the component requires an address from which it will
receive data in the form of a JSON response.

 

I'm not sure what is the best way to go about it. Simple and most ugly
approach would be to have something of a "Controller Page"

a page that takes parameters such as the entity that is being retrieved and
also paging info, sort order, etc and returns the JSON response.

I do not like this aproach as, most obvious reason is that it would not be
obvious from the component what you need to do in order to get it to work.

 

I would much more preffer to having a callback method that returns the json.
So I have created a

 

AbstractDefaultAjaxBehavior clientConnectBehavior = new
AbstractDefaultAjaxBehavior() {

 

            protected void respond(AjaxRequestTarget ajaxRequestTarget) {

                   ajaxRequestTarget.prependJavascript("{page: 1, total: 239
}");

 

            }

and used clientConnectBehavior.getCallbackUrl() as the url passed to the
flexigrid.

 

Unfortunately the problem is the response when invoked is wrapped in a
<ajax-response><evaluate encoding="wicket1">

<?xml version="1.0" encoding="UTF-8"?>

<ajax-response><evaluate encoding="wicket1"><![CDATA[{page: 1,total:
239}]]></evaluate></ajax-response>

 

So my question is how to get only the JSON part without the <?xml version.>,
<ajax-response> . and <CDATA> decoration. Can it be bypassed? Shoul I
override something in AbstractDefaultAjaxBehavior? 

Or any other ideea to go about the problem.

 

Thank you,

 

Serban