org.eclipse.emf.eef.runtime.impl.utils.ModelViewerHelper.java Source code

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Here is the source code for org.eclipse.emf.eef.runtime.impl.utils.ModelViewerHelper.java

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/*******************************************************************************
 * Copyright (c) 2008, 2011 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.eef.runtime.impl.utils;

import java.util.ArrayList;
import java.util.List;

import org.eclipse.core.resources.IContainer;
import org.eclipse.core.resources.IResource;
import org.eclipse.emf.ecore.EClass;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.EStructuralFeature;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.viewers.TreeViewer;

/**
 * @author <a href="mailto:nathalie.lepine@obeo.fr">Nathalie Lepine</a>
 */
public class ModelViewerHelper {

    private static IStructuredSelection lastSelection;

    public static void setLastSelection(IStructuredSelection selection) {
        lastSelection = selection;
    }

    public static IStructuredSelection getLastSelection() {
        return lastSelection;
    }

    public static final String NAME = EEFRuntimeMessages.ModelViewerHelper_name_feature;

    public static String getName(Object element) {
        if (element instanceof EObject) {
            EObject eobj = (EObject) element;
            EStructuralFeature structuralFeature = eobj.eClass().getEStructuralFeature(NAME);
            if (structuralFeature != null) {
                Object name = eobj.eGet(structuralFeature);
                if (name == null) {
                    return null;
                }
                return name.toString();
            }
            if (eobj instanceof EClass) {
                String type = ((EClass) eobj).getName();
                if (type != null && type != "") { //$NON-NLS-1$
                    return type;
                }
            }
            return null;
        }
        return null;
    }

    /**
     * Sets the selected existing container.
     * 
     * @param container
     */
    public static void setSelectedElement(TreeViewer treeViewer, IResource resource) {
        // expand to and select the specified container
        List<IContainer> itemsToExpand = new ArrayList<IContainer>();
        IContainer parent = resource.getParent();
        while (parent != null) {
            itemsToExpand.add(0, parent);
            parent = parent.getParent();
        }
        treeViewer.setExpandedElements(itemsToExpand.toArray());
        treeViewer.setSelection(new StructuredSelection(resource), true);
    }
}