org.eclipse.emf.compare.diagram.internal.extensions.provider.spec.EdgeChangeItemProviderSpec.java Source code

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Here is the source code for org.eclipse.emf.compare.diagram.internal.extensions.provider.spec.EdgeChangeItemProviderSpec.java

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/**
 * Copyright (c) 2013 Obeo.
 * 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:
 *     Obeo - initial API and implementation
 */
package org.eclipse.emf.compare.diagram.internal.extensions.provider.spec;

import com.google.common.collect.Iterators;

import org.eclipse.emf.compare.Diff;
import org.eclipse.emf.compare.DifferenceKind;
import org.eclipse.emf.compare.ReferenceChange;
import org.eclipse.emf.compare.diagram.internal.extensions.DiagramDiff;
import org.eclipse.emf.compare.diagram.internal.factories.extensions.EdgeChangeFactory;
import org.eclipse.emf.edit.provider.ItemProviderAdapter;

/**
 * Item provider for edge changes.
 * 
 * @author <a href="mailto:cedric.notot@obeo.fr">Cedric Notot</a>
 */
public class EdgeChangeItemProviderSpec extends ForwardingDiagramDiffItemProvider {

    /**
     * Constructor.
     * 
     * @param delegate
     *            The origin item provider adapter.
     */
    public EdgeChangeItemProviderSpec(ItemProviderAdapter delegate) {
        super(delegate);
    }

    /**
     * {@inheritDoc}
     * 
     * @see org.eclipse.emf.compare.diagram.internal.extensions.provider.spec.ForwardingDiagramDiffItemProvider#getReferenceText(org.eclipse.emf.compare.diagram.internal.extensions.DiagramDiff)
     */
    @Override
    protected String getReferenceText(DiagramDiff diagramDiff) {
        String result = ""; //$NON-NLS-1$
        Diff diff = null;
        DifferenceKind kind = diagramDiff.getKind();
        switch (kind) {
        case ADD:
        case DELETE:
            diff = Iterators.find(diagramDiff.getRefinedBy().iterator(),
                    EdgeChangeFactory.isMainDiffForAddOrDeleteEdge(), null);
            break;
        case CHANGE:
            result = "look"; //$NON-NLS-1$
            break;
        default:
        }
        if (diff instanceof ReferenceChange) {
            result = ((ReferenceChange) diff).getReference().getName();
        }
        return result;
    }

}