[news.eclipse.tools.emf] Complex EMF Query for a "Simple Query"

[nirmalts@xxxxxxxxx (Nirmal Sasidharan)]

Hello,

I am playing around with EMF Query currently. I wanted to write a simple 
query based on the Extended Library Model. 

SELECT Authors
FROM Library
WHERE COUNT(Authors.Books) > 10

I ended up writing a query like this. Would like to know if there is a 
simpler way of doing this.

EObjectCondition adaptedCondition = new EObjectCondition(){
	@Override
	public boolean isSatisfied(EObject object) {
		if (object.eClass().equals(EXTLibraryPackage.eINSTANCE.getWriter())) {
			if 
(((EList)object.eGet(EXTLibraryPackage.eINSTANCE.getWriter_Books())).size() 
> 10)
				return true;
		}
		return false;
	}
};

EObjectCondition contextCondition = new EObjectTypeRelationCondition(
		EXTLibraryPackage.eINSTANCE.getWriter());

EObjectCondition valueCondition = new EObjectReferenceValueCondition(
		EXTLibraryPackage.eINSTANCE.getBook_Author(),
		adaptedCondition);

EObjectCondition masterCondition = new EObjectReferenceValueCondition(
		contextCondition,
		EXTLibraryPackage.eINSTANCE.getWriter_Books(), valueCondition);
		
What I find funny is the fact that, I started with Writer as the context 
(because this is what I want to return). Then I get the Books of the 
Writer, then the Writer of the Books, then the Books of the writer again. 
Arrrrg.... Has to be a better way.

Thanks in advance,

Nirmal