Custom REST DataSource - DSRequest data

[fabio.bozzo]

Hi, I'm trying to code a custom DS for accessing our REST-JSON web services.
I don't really like RestDataSource so here's my own:

package it.celi.client;

import it.celi.client.overlay.BusinessFunction;

import org.restlet.gwt.Callback;
import org.restlet.gwt.Client;
import org.restlet.gwt.data.Protocol;
import org.restlet.gwt.data.Request;
import org.restlet.gwt.data.Response;

import com.google.gwt.core.client.GWT;
import com.google.gwt.core.client.JsArray;
import com.smartgwt.client.data.DSRequest;
import com.smartgwt.client.data.DSResponse;
import com.smartgwt.client.data.DataSource;
import com.smartgwt.client.data.fields.DataSourceTextField;
import com.smartgwt.client.types.DSDataFormat;
import com.smartgwt.client.types.DSProtocol;
import com.smartgwt.client.widgets.grid.ListGridRecord;

public class BusinessFunctionDataSource extends DataSource {

	private final Client client = new Client(Protocol.HTTP);

	public BusinessFunctionDataSource() {

		setDataProtocol(DSProtocol.CLIENTCUSTOM);
		setDataFormat(DSDataFormat.JSON);
		setClientOnly(false);

		DataSourceTextField idField = new DataSourceTextField("id", "ID");
		DataSourceTextField descriptionField = new DataSourceTextField("description", "Descrizione");
		idField.setPrimaryKey(true);
		addField(idField);
		addField(descriptionField);
	}

	private final native JsArray<BusinessFunction> asJsonArray(String json) /*-{return eval(json); }-*/;

	@Override
	protected Object transformRequest(DSRequest request) {
		String requestId = request.getRequestId();
		DSResponse response = new DSResponse();
		response.setAttribute("clientContext", request.getAttributeAsObject("clientContext"));
		response.setStatus(0);
		switch (request.getOperationType()) {
		case FETCH:
			executeFetch(requestId, request, response);
			break;
		case ADD:
			executeAdd(requestId, request, response);
			break;
		case UPDATE:
			executeUpdate(requestId, request, response);
			break;
		case REMOVE:
			executeRemove(requestId, request, response);
			break;
		default:
			break;
		}
		return request.getData();
	}

	protected void executeFetch(final String requestId, DSRequest request, final DSResponse response) {

		client.get(getDataURL(), new Callback() {
			@Override
			public void onEvent(Request request, Response eventResponse) {
				JsArray<BusinessFunction> jsonBfs = asJsonArray(eventResponse.getEntity().getText());
				ListGridRecord[] records = new ListGridRecord[jsonBfs.length()];
				for (int i = 0; i < jsonBfs.length(); i++) {
					records[i] = new ListGridRecord(jsonBfs.get(i));
				}
				response.setData(records);
				response.setTotalRows(records.length);
				processResponse(requestId, response);
			}
		});

	}

	protected void executeAdd(String requestId, DSRequest request, DSResponse response) {
		GWT.log("ADD", null);
		client.post(getDataURL(), "{\"description\":\"scolpita nella pietra\",\"id\":\"DACODICE\"}", new Callback() {
			@Override
			public void onEvent(Request request, Response response) {
				 GWT.log("SUCCESS!", null);
			}
		});
	}

	protected void executeUpdate(String requestId, DSRequest request, DSResponse response) {
		GWT.log("UPD" + request.getJsObj().toString(), null);
	}

	protected void executeRemove(String requestId, DSRequest request, DSResponse response) {
		GWT.log("DEL" + request.getData().toString(), null);
	}
}

My problem is on executeAdd() : now you see a stub json object passed as a string.


What I want to do is to get my new data as json (or simply a string that I can parse) from dsrequest (data come from a listGrid) and use them.
getData() and getDataAsString() keep returning me [Object object]

Can you help me please?
Thanks to all in advice!

F.B.