This code is quite simple The line:
re = rb.sendRequest("jsonrpc-call=" + JsonHelper.jsoToString(call), new RequestCallback() prepare a AJAX call to the server and make your javascript object to a string using JsonHelper.jsoToString. In ther server the json-string will be accessible by the parameter "jsonrpc-call". The line: if (response.getStatusCode() == 200 || response.getStatusCode() == 304) { JavaScriptObject responseData = JsonHelper.stringToJso(response.getText()).cast()); // use the response } get the response wrote by the server and make i availabe as a JavaScriptObject. You can use the JSONObject class to populate and read a JavaScriptObject. You can read more about JSON + GWT at: http://code.google.com/intl/webtoolkit/webtoolkit/doc/latest/DevGuideServerCommunication.html#DevGuideHttpRequests and http://code.google.com/intl/webtoolkit/webtoolkit/articles/using_gwt_for_json_mashups.html On 5 jul, 12:50, Ahmed Shoeib <ahmedelsayed.sho...@gmail.com> wrote: > i want a simple example to describe it > cause i need it as soon as possible > > On Jul 5, 6:18 pm, André Moraes <andr...@gmail.com> wrote: > > > > > re = rb.sendRequest("jsonrpc-call=" + > > JsonHelper.jsoToString(call), > > new RequestCallback() { > > > @Override > > public void onResponseReceived(Request > > request, Response response) > > { > > if (response.getStatusCode() == 200 > > || response.getStatusCode() > > == 304) > > { > > JavaScriptObject > > responseData = > > JsonHelper.stringToJso(response.getText()).cast()); > > // use the response > > } > > else > > { > > // invalid response > > } > > } > > > @Override > > public void onError(Request request, > > Throwable exception) { > > // error on the resquest > > } > > }); > > > public class JsonHelper { > > > public static String jsoToString(JavaScriptObject jso) { > > if (isJsonLibraryDefined()) { > > return _jsoToString(jso); > > } else { > > return new JSONObject(jso).toString(); > > } > > } > > > public static JavaScriptObject stringToJso(String value) { > > if (isJsonLibraryDefined()) { > > return _stringToJso(value); > > } else { > > return _stringToJsoEval(value); > > } > > } > > > public static native String _jsoToString(JavaScriptObject jso) /*-{ > > return JSON.stringify(jso); > > }-*/; > > > public static native JavaScriptObject _stringToJso(String string) > > /*- > > { > > return JSON.parse(string); > > }-*/; > > > public static native JavaScriptObject _stringToJsoEval(String > > string) /*-{ > > return eval("(" + string + ")"); > > }-*/; > > > public static native boolean isJsonLibraryDefined() /*-{ > > return typeof(JSON) != 'undefined' > > && typeof(JSON.parse) != 'undefined' > > && typeof(JSON.stringify) != 'undefined'; > > }-*/; > > > } > > > The JsonHelper class handle the conversion to and from JSON. > > > If possible use the json.org javascript library that implements the > > functions JSON.parse / JSON.stringify > > > I am currently writing a project that encapsulates that library and > > make it more easier to use than this JsonHelper class. > > > When i release it in google-code I let you know. > > > Hope it helps. > > > On 5 jul, 09:01, Ahmed Shoeib <ahmedelsayed.sho...@gmail.com> wrote: > > > > Dear Friends , > > > > i face a problem when trying to send and receive json object between > > > client and server in GWT application > > > > so i want a simple example that show me how to do this > > > > Thanks, > > > ahmed shoeib -- You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. To post to this group, send email to google-web-tool...@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.