org.dresdenocl.modelbus.ui.internal.wizards.util.MetaModelLabelProvider.java Source code

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Here is the source code for org.dresdenocl.modelbus.ui.internal.wizards.util.MetaModelLabelProvider.java

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/*
Copyright (C) 2009 by Claas Wilke (claaswilke@gmx.net).
    
This file is part of the Model Bus GUI of Dresden OCL2 for Eclipse.
    
Dresden OCL2 for Eclipse is free software: you can redistribute it and/or modify 
it under the terms of the GNU Lesser General Public License as published by the 
Free Software Foundation, either version 3 of the License, or (at your option)
any later version.
    
Dresden OCL2 for Eclipse is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License 
for more details.
    
You should have received a copy of the GNU Lesser General Public License along 
with Dresden OCL2 for Eclipse. If not, see <http://www.gnu.org/licenses/>.
 */
package org.dresdenocl.modelbus.ui.internal.wizards.util;

import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.jface.resource.LocalResourceManager;
import org.eclipse.jface.resource.ResourceManager;
import org.eclipse.jface.viewers.ILabelProvider;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.swt.graphics.Image;

import org.dresdenocl.model.metamodel.IMetamodel;
import org.dresdenocl.modelbus.metamodel.IMetamodelDescriptor;

/**
 * <p>
 * A {@link LabelProvider} to display {@link IMetamodel}s.
 * </p>
 */
public class MetaModelLabelProvider extends LabelProvider implements ILabelProvider {

    /** A helper object to manage associated icons. */
    private ResourceManager resources;

    /**
     * <p>
     * Creates a new {@link MetaModelLabelProvider}.
     * </p>
     */
    public MetaModelLabelProvider() {

        this.resources = new LocalResourceManager(JFaceResources.getResources());
    }

    /*
     * (non-Javadoc)
     * @see org.eclipse.jface.viewers.BaseLabelProvider#dispose()
     */
    @Override
    public void dispose() {

        this.resources.dispose();
    }

    /*
     * (non-Javadoc)
     * @see org.eclipse.jface.viewers.LabelProvider#getImage(java.lang.Object)
     */
    @Override
    public Image getImage(Object element) {

        Image result;

        /*
         * Check if the meta model has been added and configured via the metamodels
         * extension point.
         */
        if (element instanceof IMetamodelDescriptor) {
            IMetamodelDescriptor metamodel;

            metamodel = (IMetamodelDescriptor) element;

            ImageDescriptor imageDescriptor;
            imageDescriptor = ImageDescriptor.createFromURL(((IMetamodelDescriptor) metamodel).getIconURL());

            if (imageDescriptor == null) {
                imageDescriptor = ImageDescriptor.getMissingImageDescriptor();
            }
            // no else.

            result = this.resources.createImage(imageDescriptor);
        }

        else {
            result = null;
        }

        return result;
    }

    /*
     * (non-Javadoc)
     * @see org.eclipse.jface.viewers.LabelProvider#getText(java.lang.Object)
     */
    @Override
    public String getText(Object element) {

        IMetamodel metamodel;

        metamodel = (IMetamodel) element;

        return metamodel.getName();
    }
}