org.eclipse.xtext.serializer.impl.FeatureFinderUtil.java Source code

Introduction

Here is the source code for org.eclipse.xtext.serializer.impl.FeatureFinderUtil.java

Source

/*******************************************************************************
 * Copyright (c) 2011 itemis AG (http://www.itemis.eu) 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
 *******************************************************************************/
package org.eclipse.xtext.serializer.impl;

import org.eclipse.emf.ecore.EClass;
import org.eclipse.emf.ecore.EStructuralFeature;
import org.eclipse.xtext.AbstractElement;
import org.eclipse.xtext.Action;
import org.eclipse.xtext.Assignment;
import org.eclipse.xtext.GrammarUtil;

import com.google.common.base.Preconditions;

/**
 * @author Sebastian Zarnekow - Moved from GrammarUtil
 */
public class FeatureFinderUtil {

    /**
     * @since 2.0
     */
    public static EStructuralFeature getFeature(AbstractElement grammarElement, EClass owner) {
        Preconditions.checkNotNull(owner);
        if (grammarElement == null)
            return null;
        String featureName = null;
        if (grammarElement instanceof Action)
            featureName = ((Action) grammarElement).getFeature();
        else {
            Assignment ass = GrammarUtil.containingAssignment(grammarElement);
            if (ass != null)
                featureName = ass.getFeature();
        }
        if (featureName != null)
            return owner.getEStructuralFeature(featureName);
        return null;
    }

}