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[Xtend2] anonymous inner classes [message #683914]

Tue, 14 June 2011 16:34

Joel Denton

Messages: 18
Registered: May 2011

Junior Member

Hi, I'm having trouble with the syntax for an anonymous inner class in Xtend2.

Here's the java code:

      Predicate<IEObjectDescription> filter = new Predicate<IEObjectDescription>(){
    	  public boolean apply(IEObjectDescription input) {
			return false;
    	  }
      };

This is my current attempt, but it's failing on several levels:

	val filter = new Predicate<IEObjectDescription>(){
		def apply(IEObjectDescription input) {
			return false
		}
	}

I couldn't find any examples of this in the Xtend2 tutorials.

Thanks!

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Re: [Xtend2] anonymous inner classes [message #683965 is a reply to message #683914]

Tue, 14 June 2011 19:00

Joel Denton

Messages: 18
Registered: May 2011

Junior Member

Never mind, I entirely missed the idea of using a closure here. Here's the java code I was initially trying to duplicate:

filteredScope = new FilteringScope(scope,
        new Predicate<IEObjectDescription>() {			
            public boolean apply(IEObjectDescription input) {
                return input.getEObjectOrProxy() instanceof Entity;
            };
        });

And here's the Xtend2 that works.

val filteredScope = new FilteringScope(scope, [input | input.EObjectOrProxy instanceof Entity])

Still getting used to closures, but very nice!

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