EMenuService throwing nullpointerException in @postConstruct

Question

I am trying to customize right mouse click in my RCP E4 browser, I created the popup menu in application.e4xmi, and here is my code for triggering the right click event.

for creating the part inside a part stack:

 public void showBrowser(Composite parent, EModelService service,
            MApplication application, EPartService partservice) {
        MPartStack mpartstack = (MPartStack) service.find(
                "com.example.e4.rcp.wizard.partstack.confps", application);
        MPart navigationpart = partservice
                .createPart("com.example.e4.rcp.wizard.partdescriptor.navigate_pd");
        navigationpart.setLabel("Visual Navigator");
        // for adding the menucontext

        //
        mpartstack.getChildren().add(navigationpart);
        MPartStack metadata_ps = (MPartStack) service.find(
                "com.example.e4.rcp.wizard.partstack.metadataPS", application);
        metadata_ps.setVisible(true);
        MPart metadatapart = partservice
                .createPart("com.example.e4.rcp.wizard.partdescriptor.metadatadesc");
        metadatapart.setLabel("Metadata");
        metadata_ps.getChildren().add(metadatapart);
    }

Inside the part descriptor: " com.example.e4.rcp.wizard.partdescriptor.navigate_pd "

@Inject
    IEclipseContext context;
    EMenuService menuservice;

    @PostConstruct
    public void createControll(Composite parent, EModelService service,
            MApplication application) {
   // some other stuffs
   menuservice.registerContextMenu(browser, "com.example.e4.rcp.wizard.popupmenu");
}

its showing NullPointerException at runtime, i tried to inject EMenuService in postconstruct method also, but in that case as expected the result is worse (you know why). I am pretty new in RCP E4, so advanced sorry if I am making any basic mistake.

Answer 1

You must use @Inject on each field that you want injected:

@Inject
IEclipseContext context;
@Inject
EMenuService menuservice;

Your existing code is only asking for IEclipseContext to be injected.