Is there an example for DataSource.transformResponse?

[winglight]

I customized RestDataSource to support our REST service that's successfully to post the correct request with right data but failed at response.
Our rest service will return a map object on JSON format for any REST request. So far, there're two problem as follows:
1.callback is never invoked after requesting a "GET" and server's response is no problem
2.DSResponse has nothing about response data. I think we need to override the method of DataSource.transformResponse but no example code anywhere
Any hint will be appreciated. TIA!

[ADA]

for problem 2
You have to override transformResponse in your DataSource. Object data has the response from the server

@Override
	protected void transformResponse(DSResponse response, DSRequest request, Object data) {
		
		if (request.getOperationType().equals(DSOperationType.REMOVE))
		{
			if(XMLTools.selectString(data,"/XDocument/XStatus").equalsIgnoreCase("Failed"))
			{					
				response.setStatus(-1);
				Map<String, String> mpErrors = new HashMap<String, String>();
				mpErrors.put("XErrorDesc", XMLTools.selectString(data,"/XDocument/XErrorDesc"));
				response.setErrors(mpErrors);
			}
			
		}
		
		super.transformResponse(response, request, data);

    }

I am using REST services that return XML responses like below.

<XDocument>
    <XStatus>Failed</XStatus>
    <XAction>GET</XAction>
    <XErrorDesc>orgID: Invalid</XErrorDesc>
    <XService>User</XService>
</XDocument>

[winglight]

Thank you, ADA.
My problem is how to transform response as JSON object. You see, here's my json format from the server:

{    
    response:{
       flag:0,
       errorcode:0,
       screen:CONTACT,
       object:[
           {field1:"value", field2:"value"},
           {field1:"value", field2:"value"},
           ... 75 total records ...
       ]
    }
 }

What am I supposed to do with this kind of object?

[Isomorphic]

The third parameter ("data") is your JSON structure as a JavaScriptObject. Use JSOHelper to access it's properties, or use XMLTools.selectObjects().

[winglight]

Thank you, Isomorphic.
I get over the problem on the process of request-response by json format.
But there's a new problem, how to transform the json array into the Record[] type which is taken by the method response.setData()?
TIA!

[Isomorphic]

JSOHelper + iteration.

[smartgwt.dev]

Try

JavaScriptObject jsoArray = JSOHelper.html.convertMapToJavascriptObject(java.util.Map);
Record[] records = Record.convertToRecordArray(jsoArray);

[winglight]

Thank you, smartgwt.dev. Your code is very helpful.