invalidateCache always false on client's callback

[michalg]

Hi,
I am trying to use an optional flag "invalidateCache" which my my RestDataSource compatible serwer is setting to true in some cases. Unfortunately, for a reason I can't find, client reads this flag as false always. To trace it down I prepared the following example in which the server response for add request is imitated in the add.xml static file.
I will appreciate if anybody can follow this example and show what I am doing wrong here.
Thanks,
MichalG
SGWT daily from 2011-02-21, Firefox 3.6.9, hosted/debug mode, Gentoo linux

<response>
      <status>STATUS_SUCCESS</status>
      <invalidateCache>true</invalidateCache>
      <data>
      </data>
</response>

package org.yournamehere.client;

import com.google.gwt.core.client.EntryPoint;
import com.smartgwt.client.data.DSCallback;
import com.smartgwt.client.data.DSRequest;
import com.smartgwt.client.data.DSResponse;
import com.smartgwt.client.data.OperationBinding;
import com.smartgwt.client.data.Record;
import com.smartgwt.client.data.RestDataSource;
import com.smartgwt.client.types.DSOperationType;
import com.smartgwt.client.types.DSProtocol;
import com.smartgwt.client.util.SC;

public class MainEntryPoint implements EntryPoint {

    public MainEntryPoint() {
        SC.showConsole();
    }

    public void onModuleLoad() {

        RestDataSource ds = new RestDataSource();
        OperationBinding add = new OperationBinding();
        add.setOperationType(DSOperationType.ADD);
        add.setDataProtocol(DSProtocol.POSTMESSAGE);
        ds.setOperationBindings(add);

        ds.setAddDataURL("add.xml");

        ds.addData(new Record(), new DSCallback() {

            public void execute(DSResponse response, Object rawData, DSRequest request) {
                System.out.println("Why always false here !? "+response.getInvalidateCache());
            }
        });
    }
}

[michalg]

To answer my own question:
Looks like RestDataSource ignores invalidateCache flag.
Workaround in the transformResponse():

    @Override
    protected void transformResponse(DSResponse response, DSRequest request, Object data) {
        response.setInvalidateCache(Boolean.valueOf(XMLTools.selectString(data, "//invalidateCache")));
        super.transformResponse(response, request, data);
    }

HTH
MichalG