We have used JSO for our JSON parsing in GWT client side. Now, we need to convert our Java objects to JSON string. I just wanted to understand, how we can achieve this? JSO overlay types was used for JSON parsing. Can it also be used to create a JSON request string or do we have to go by some other means?
1
-
Thanks Stefan...I have done that now. I was new to stackoverflow and hence was not aware that I need to go and say Accept answer. Thanks again..Hope somebody repliesSantosh– Santosh2012-06-01 07:42:23 +00:00Commented Jun 1, 2012 at 7:42
Add a comment
|
1 Answer
Generating a JSON object in JavaScript is pretty simple. You can do it like this:
var obj = { "var1": "hello", "var2": "world" };
this will generate a JSON object with two varibles ("var1" and "var2") with their values ("hello", "world").
The Object can be converted into a String (for sending purposes) with the JSON.stringify(jso); method.
Generating JSON data from the java code isn't possible (well not with a usefull result) since all varibles are optimzed to single Strings, so applying this method wouldn't hava a usefull result (if even possible).
If you have already a JSO object (generated with something like safeeval). You can edit your varibles there, like this:
public final native void newValue(String newValue) /*-{
this.ValueName = newValue;
}-*/;
If you then want the object as string you have to define the following method in your JSO class:
public final native String returnAsString () /*-{
return JSON.stringify(this);
}-*/;
or use this in you Java class: String s = (new JSONObject(jso)).toString();.
This way you can edit your original intput data and send the original object back to the server.
BR
2 Comments
Santosh
Thanks...Okey. So editing an existing JSO and returning back to server with string is fine. But, if I have a java object, then we have to manually create the json string is it? I mean, we do not have any option to create a JSO from java object and then use JSO feature to create a json..
Stefan
already wrote what I think about this: Generating JSON data from the java code isn't possible (well not with a usefull result) since all varibles are optimzed to single Strings, so applying this method wouldn't hava a usefull result (if even possible).
