|Running GEF5 with Open JDK 17 and Open JavaFX 17 on Eclipse 4.25 [message #1860628]
||Tue, 22 August 2023 12:19
| Rishabh Sharma
Registered: August 2023
I've been trying to setup GEF5 on Eclipse 4.25 with Open JDK 17 and Open Java FX 17. I was successful to some extent however when I tried to use GEF's creation policy (org.eclipse.gef.mvc.fx.policies.CreationPolicy) to draw a visual, there was an exception and I could not draw the visual on the canvas.
The Exception was
java.lang.NullPointerException: Cannot invoke "org.eclipse.gef.mvc.fx.parts.IContentPart.getRoot()" because "part" is null
I debugged the issue and found out some things mentioned below
The issue is that in the CreationPolicy.create method , we add a Content Child to a Parent ContentPolicy, (Line num : 119) which, in short , adds a child Content Part to an ObservableListWrapperEx of the parent through the setAll Operation.
The following piece of code then triggers an event
previousContents, delegate(), 0, size())));
which the JavaFX17 should respond to an then the Actual Content Part is retrieved from the Content Factory.
But in JavaFX 17 --> javafx.collections.ObservableListBase<E> --> void javafx.collections.ObservableListBase.fireChange(Change<? extends E> change method, the listenerHelper is null for this list and hence the event is then ignored.
However, I was able to get it to work with OpenJDK11 and Open JavaFX 11.
I also need it to work on OpenJDK 17 and Open JavaFX17.
Did I do something wrong in the setup?
I'm using GEF 5 on both my setups and e(fx)clipe 3.7.0 with eclipse 4.14 and OpenJDK 11
and e(fx)clipse 3.9.0 with eclipse 4.25 and Open JDK 17.
Any help would be appreciated.
Thanks and Regards,
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