DroidScopeProvider.java

/*
 * generated by Xtext
 */
package org.eclipse.amalgam.tutorials.xtext.scoping;

import java.util.ArrayList;

import org.eclipse.amalgam.tutorials.emf.droid.*;
import org.eclipse.emf.ecore.EReference;
import org.eclipse.xtext.scoping.IScope;
import org.eclipse.xtext.scoping.Scopes;
import org.eclipse.xtext.scoping.impl.AbstractDeclarativeScopeProvider;


/**
 * This class contains custom scoping description.
 * 
 * see : http://www.eclipse.org/Xtext/documentation/latest/xtext.html#scoping
 * on how and when to use it 
 *
 */
public class DroidScopeProvider extends AbstractDeclarativeScopeProvider {

	public IScope scope_LayoutParams_layout_above(LayoutParams lp, EReference ref){
		return getSiblingsOfParentView(lp);
	}

	public IScope scope_LayoutParams_layout_below(LayoutParams lp, EReference ref){
		return getSiblingsOfParentView(lp);
	}

	public IScope scope_LayoutParams_layout_roRightOf(LayoutParams lp, EReference ref){
		return getSiblingsOfParentView(lp);
	}

	public IScope scope_LayoutParams_layout_roLeftOf(LayoutParams lp, EReference ref){
		return getSiblingsOfParentView(lp);
	}

	private IScope getSiblingsOfParentView(LayoutParams lp) {
		IScope scope = IScope.NULLSCOPE;

		try {
			View containingView = ((View) lp.eContainer() );
			ViewCollection containingCollection = ((ViewCollection) containingView.eContainer() );

			//Removes the parent
			ArrayList<View> scopeViews = new ArrayList<View>(containingCollection.getViews());
			scopeViews.remove(containingView);
			scope = Scopes.scopeFor(scopeViews);
		} catch (Exception e) {
			logger.debug("Error getting Scope", e);
		}
		
		return scope;
	}

}