org.yakindu.sct.generator.genmodel.scoping.SGenGlobalScopeProvider.java Source code

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Here is the source code for org.yakindu.sct.generator.genmodel.scoping.SGenGlobalScopeProvider.java

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/**
 * Copyright (c) 2018 committers of YAKINDU and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     committers of YAKINDU - initial API and implementation
 */
package org.yakindu.sct.generator.genmodel.scoping;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;

import org.eclipse.emf.ecore.EClass;
import org.eclipse.emf.ecore.resource.Resource;
import org.eclipse.xtext.resource.IContainer;
import org.eclipse.xtext.resource.IEObjectDescription;
import org.eclipse.xtext.scoping.IScope;
import org.eclipse.xtext.scoping.impl.DefaultGlobalScopeProvider;
import org.eclipse.xtext.scoping.impl.SimpleScope;

import com.google.common.base.Predicate;
import com.google.common.collect.Iterables;
import com.google.common.collect.Lists;

/**
 * 
 * @author kutz - Initial contribution and API
 *
 */
public class SGenGlobalScopeProvider extends DefaultGlobalScopeProvider {

    /**
     * Overidden to avoid scope nesting which comes with shadowing problems when
     * potential elements in scope have the same name
     */
    @Override
    protected IScope getScope(IScope parent, final Resource context, boolean ignoreCase, EClass type,
            Predicate<IEObjectDescription> filter) {
        IScope result = parent;
        if (context == null || context.getResourceSet() == null)
            return result;
        List<IContainer> containers = Lists.newArrayList(getVisibleContainers(context));
        Collections.reverse(containers);
        List<IEObjectDescription> objectDescriptions = new ArrayList<IEObjectDescription>();
        Iterator<IContainer> iter = containers.iterator();
        while (iter.hasNext()) {
            IContainer container = iter.next();
            result = createContainerScopeWithContext(context, IScope.NULLSCOPE, container, filter, type,
                    ignoreCase);
            Iterables.addAll(objectDescriptions, result.getAllElements());
        }
        return new SimpleScope(objectDescriptions);
    }
}