Send JSON as param using a4j:jsFunction

[satyakatti]

Hi All,

Is it possible to send JSON object as a pramaeter using a4j:jsFunction?

Ex: 

<a4j:form>

    <a4j:jsFunction name="callMe" reRender="updateSomeView">

       <a4j:actionparam name="jsonObject" assignTo="#{userBean.jsonObject}" />

    </a4j:jsFunction>

</a4j:form>

Also I am trying to implement a JS interface for third party JQuery library. So that library should call my JS function.

For this to work is it enough for me to define the function using <a4j:jsFunction name="callMe"> or should I actually have to decalre JS function

like : function callMe() {...}

Thanks in advance for all the help.

Regards,

Satya

[nbelaevski]

Hi Satya,

No it's not possible to send JSON object out of the box.

It is enough to define <a4j:jsFunction> tag, nothing else required.

[satyakatti]

Hi Nick,

I tried few things yesterday and it is possible to send the JSON object. Also you can reconstruct the object at bean.

Though not straightforward but still possible.

Below code calls a javascript function which internally calls a4j:jsFunction for sending JSON...

        <a4j:form>

            <a4j:commandButton value="Click Me..." onclick='callMe();'/>

            <a4j:jsFunction name="updateCart">

                <a4j:actionparam name="json" assignTo="#{partManagementBean.jsonObject}"/>                 

            </a4j:jsFunction>

        </a4j:form>

JS function converts JSON to text

function callMe() {

    var myJSON = {"firstName" : "Satya", "lastName" : "K"};

    var jsonText = JSON.stringify(myJSON);

    updateCart(jsonText);

}

Reconstructing the JSON string to Object...

   public void setJsonObject(Object jsonObject) throws JSONException {

        JSONObject richObj = new JSONObject(jsonObject.toString());

        LOGGER.info("richfaces jsonObject : " + richObj.getString("firstName"));

        this.jsonObject = jsonObject;

   }

Regards,

Satya

[nbelaevski]

Yes, possible in this way.