com.ge.research.sadl.scoping.SadlLocalScopeProvider.java Source code

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Here is the source code for com.ge.research.sadl.scoping.SadlLocalScopeProvider.java

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/************************************************************************
 * Copyright  2007-2014 - General Electric Company, All Rights Reserved
 *
 * Project: SADL
 *
 * Description: The Semantic Application Design Language (SADL) is a
 * language for building semantic models and expressing rules that
 * capture additional domain knowledge. The SADL-IDE (integrated
 * development environment) is a set of Eclipse plug-ins that
 * support the editing and testing of semantic models using the
 * SADL language.
 *
 * This software is distributed "AS-IS" without ANY WARRANTIES
 * and licensed under the Eclipse Public License - v 1.0
 * which is available at http://www.eclipse.org/org/documents/epl-v10.php
 *
 ***********************************************************************/
package com.ge.research.sadl.scoping;

import javax.inject.Inject;

import org.eclipse.emf.ecore.EReference;
import org.eclipse.emf.ecore.resource.Resource;
import org.eclipse.xtext.naming.QualifiedName;
import org.eclipse.xtext.naming.SimpleNameProvider;
import org.eclipse.xtext.resource.IEObjectDescription;
import org.eclipse.xtext.resource.impl.AliasedEObjectDescription;
import org.eclipse.xtext.scoping.IScope;
import org.eclipse.xtext.scoping.impl.SimpleLocalScopeProvider;
import org.eclipse.xtext.scoping.impl.SimpleScope;

import com.ge.research.sadl.sadl.SadlPackage;
import com.google.common.base.Function;
import com.google.common.base.Predicate;
import com.google.common.collect.Iterables;

/**
 * Creates aliased object descriptions for ResourceName instances in the global scope: All ResourceNames are available with their simple name also.
 * @author thoms
 */
public class SadlLocalScopeProvider extends SimpleLocalScopeProvider {
    @Override
    protected IScope getGlobalScope(Resource context, EReference reference) {
        IScope globalScope = super.getGlobalScope(context, reference);

        // Create a filtered view on all ResourceNames from the global scope that have a 2 segment qualified name (namespace:name)
        Iterable<IEObjectDescription> resourceNameDescriptions = Iterables.filter(globalScope.getAllElements(),
                new Predicate<IEObjectDescription>() {
                    @Override
                    public boolean apply(IEObjectDescription input) {
                        return input.getEClass() == SadlPackage.Literals.RESOURCE_NAME
                                && input.getQualifiedName().getSegmentCount() == 2;
                    }
                });
        // Map these object descriptions to their simple name
        Iterable<IEObjectDescription> aliasedResourceNameDescriptions = Iterables
                .transform(resourceNameDescriptions, new Function<IEObjectDescription, IEObjectDescription>() {
                    @Override
                    public IEObjectDescription apply(IEObjectDescription input) {
                        return new AliasedEObjectDescription(
                                QualifiedName.create(input.getQualifiedName().getLastSegment()), input);
                    }
                });

        return new SimpleScope(globalScope, aliasedResourceNameDescriptions);
    }

    @Inject
    public void setNameProvider(SimpleNameProvider nameProvider) {
        super.setNameProvider(nameProvider);
    }

}