Hello There ! I believe what Chris says is totally right, I should just use a regular Java Object, I was mistaken when I thought I had to do JSON parsing on the server side. Now, I would like to know if a HashMap containing Strings only is serializable ? Could I send it from the client to the Server and Back (specially back)?
Thank you very much in advance ! Jose. On Jun 17, 10:59 pm, Jan Ehrhardt <[email protected]> wrote: > The GWT docs are offering you to use the JavaScript "eval" function directly > or through the JSONParser class, which internally uses the "eval" function. > A more secure way, that is to use the JSON > libraryhttp://www.json.org/js.html. You'll place the additional JavaScript > library > in your host page, as any other JavaScript too. Than take the code from the > GWT docs: > > private final native JsArray<StockData> asArrayOfStockData(String json) /*-{ > return *eval(json);* > > }-*/; > > and modify it like this: > > private final native JsArray<StockData> asArrayOfStockData(String json) /*-{ > return *$wnd.JSON.parse(json);* > > }-*/; > > This is more secure than using the "eval" function. Additionally the > "JSON.parse()" function has become part of the JavaScript standard and is > implemented natively in many modern browsers. The above library knows this > and delegates the secure JSON parsing to the fast native parser provided by > the browser. > > Regards > Jan Ehrhardt > > 2010/6/18 Chris Boertien <[email protected]> > > > > > Is there a particular reason that you _need_ the JSON string? If your > > using GWT RPC then you can simply send a Java Object to the server and > > the underlying GWT will handle the serialization for you. > > > If you the JSON string is coming from somewhere else and you really > > have no choice, then it may be worthwhile to put together a JSO > > Overlay, use the Overlay to instantiate a POJO on the client side > > code, and send the POJO to the server via GWT RPC. > > > Since your new some of that probably makes no sense, and If you can > > give a little more detail as to why you need to have JSON originating > > from the client I'm sure this can be explained a bit better to fit > > your case. > > > GWT-RPC:http://code.google.com/webtoolkit/doc/latest/tutorial/RPC.html > > GWT-JSON: > >http://code.google.com/webtoolkit/doc/latest/tutorial/JSON.html#client > > > 2010/6/16 Jose Luis Estrella Campaña <[email protected]>: > > > Hello Folks ! > > > > I'm glad to say that I'm a brand new user of GWT, a very happy one by > > > the way. However, as any newcomer I have questions, One in particular. > > > Here it goes: > > > > What's the easiest, most straight forward way to deserialize a JSON > > > String on the Server side and instance a Java Object from it ? > > > > The JSON String will be sent from the client side, an implementation > > > of the RemoteService for example, and I intend to deserialize it on > > > the Server side, say inside the RemoteServiceServlet Implementation, > > > so I can instance a Java Object with the information contained in the > > > JSON string afterwards. Is there a way this last step automatically > > > with some GWT API ? > > > > I would like to see some examples if it's possible. > > > > Best Regards, > > > > Sincerely, > > > > Jose. > > > > -- > > > You received this message because you are subscribed to the Google Groups > > "Google Web Toolkit" group. > > > To post to this group, send email to [email protected] > > . > > > To unsubscribe from this group, send email to > > [email protected]<google-web-toolkit%2Bunsubs > > [email protected]> > > . > > > For more options, visit this group at > >http://groups.google.com/group/google-web-toolkit?hl=en. > > > -- > > You received this message because you are subscribed to the Google Groups > > "Google Web Toolkit" group. > > To post to this group, send email to [email protected]. > > To unsubscribe from this group, send email to > > [email protected]<google-web-toolkit%2Bunsubs > > [email protected]> > > . > > For more options, visit this group at > >http://groups.google.com/group/google-web-toolkit?hl=en. -- You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
