I want to convert my java object into json by using JSNI i.e javascript native method in GWT. I dont want to use any external jar like Gson, jackson. I have dove following code.
public class JsonToJavaUsingJS implements EntryPoint {
final Student student = new Student(5, "ajinkya", "patil");
@Override
public void onModuleLoad() {
toJson(student);
}
public native void toJson(final Student student)
/*-{
var json = JSON.stringify(student);
alert("json object: " + json);
}-*/;
}
but It does not convert java object into json string. It gives follwing exception
[ERROR] [jsontojavausingjs] - Uncaught exception escaped com.google.gwt.event.shared.UmbrellaException: Exception caught: (null) @com.json.js.client.JsonToJavaUsingJS::toJson(Lcom/json/js/client/Student;)([Java object: com.json.js.client.Student@176073104]): null
plese help..!
I suggest you first try with GWT way if nothing found then go down to native JavaScript way.
A simple way is defined here GWT AutoBean framework along with quick start and samples.
Read more about Sharing objects between Java source and JavaScript.