labelproviderviewersorter.java

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/**
 * Copyright (c) 2003-2006 Craig Setera
 * All Rights Reserved.
 * Licensed under the Eclipse Public License - v 1.0
 * For more information see http://www.eclipse.org/legal/epl-v10.html
 */
package eclipseme.ui.internal.viewers;

import org.eclipse.jface.viewers.ILabelProvider;
import org.eclipse.jface.viewers.StructuredViewer;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.viewers.ViewerSorter;

/**
 * A viewer sorter implementation that does a string sort
 * based on the value of the label provided during 
 * instantiation.
 * <p />
 * Copyright (c) 2003-2006 Craig Setera<br>
 * All Rights Reserved.<br>
 * Licensed under the Eclipse Public License - v 1.0<p/>
 * <br>
 * $Revision: 1.1 $
 * <br>
 * $Date: 2006/02/11 21:27:36 $
 * <br>
 * @author Craig Setera
 */
public class LabelProviderViewerSorter extends ViewerSorter {
	/**
	 * Construct a new viewer sorter that sorts based on the
	 * label provider provided in the compare method.
	 */
	public LabelProviderViewerSorter() {
		super();
	}

	/**
	 * @see org.eclipse.jface.viewers.ViewerSorter#compare(org.eclipse.jface.viewers.Viewer, java.lang.Object, java.lang.Object)
	 */
	public int compare(Viewer viewer, Object e1, Object e2) {
		ILabelProvider labelProvider = 
			(ILabelProvider) ((StructuredViewer) viewer).getLabelProvider();
		
		String label1 = labelProvider.getText(e1);
		String label2 = labelProvider.getText(e2);
		
		return label1.compareTo(label2);
	}
}