CODEWITHSUNDEEP
javaeclipseeclipse-plugineclipse-rcp
flori10
flori10

Reputation: 522

Eclipse plugin - How to inject a IWorkbenchWindow in the constructor of a command handler

I want to test a command handler class of my Eclipse plugin. That's why I want to inject an instance of IWorkbenchWindow in the constructor of this handler class, because

PlatformUI.getWorkbench().getActiveWorkbenchWindow()

leaves me with a dependency on PlatformUI.

However I tried to do this

@Inject
public FindAndReplaceHandler(IWorkbenchWindow workbenchWindow) {
    this.fWorkbenchWindow = workbenchWindow;

and then the framework throws an NoSuchMethodException complaining that the FindAndReplaceHandler class hasn't got a no-argument constructor.

My class FindAndReplaceHandler extends AbstractHandler and overrides 

void execute(ExecutionEvent event)

(So I don't use the modern way with the annotations @Execute and @CanExecute)

My version of Eclipse is: Version: Mars.2 (4.5.2). I created my Eclipse plugin project with the setting Eclipse version = "3.5 or greater". However maybe I need to have the e4 tools installed and work with them? How to install them?

Any ideas how I can solve this problem are appreciated.

Upvotes: 1

Views: 316

Answers (1)

greg-449
greg-449

Reputation: 111217

The @Inject style of command handler is only used when writing pure e4 style plugins (and these don't use IWorkbenchWindow or PlatformUI).

If you want to use IWorkbenchWindow you are writing a 3.x compatibility mode plugin and can't use injection for the command handler (and most other things). You must have a no arguments constructor for the command handler.

Upvotes: 2

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