GWT: working with JsDate and Java Date

Question

In my overlays I wrap a JavaScript Date object in a JsDate:

public final native JsDate getDueDate() /*-{
    return this["dueDate"];
}-*/;

However when I want to use that date in a widget, say a DateBox, I need to set the value as a Java Date. I could create a Java Date from my JsDate but I believe that adds some overhead.

Date javaDate = new Date(jsDate.getTime());

Is there a cleaner way of achieving this? What is the best way to convert a JsDate object to a Java Date object and vice-versa?

Thanks a lot

Answer 1

GWT's Date implementation uses JsDate under the covers so there should be no meaningful performance penalty at all. To make things easier for consumers of the type change your overlay to return Dates instead of JsDates:

public final Date getDueDate() {
  return new Date(getDueDateNative().getTime());
}

private final static JsDate getDueDateNative() /*-{
  return this["dueDate"];
}-*/;

Answer 2

Jason's code doesn't work for me since getDueDateNative().getTime() returns a double and not a long. Therefore you have also to cast the value: return new Date((long) getDueDateNative().getTime());