/*******************************************************************************
* Copyright (c) 2005, 2012 IBM Corporation 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
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.bpel.ui.details.providers;
import org.eclipse.jface.viewers.ContentViewer;
import org.eclipse.jface.viewers.ILabelProvider;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.viewers.ViewerSorter;
/**
* A sorter which alphabetically sorts model objects based on the labels provided for them
* by the viewer's installed label provider.
*/
public class ModelViewerSorter extends ViewerSorter {
// clients should call getInstance()
protected ModelViewerSorter() { }
protected static ModelViewerSorter instance = new ModelViewerSorter();
public static ModelViewerSorter getInstance() { return instance; }
@Override
public int compare(Viewer viewer, Object e1, Object e2) {
if (e1 == null && e2 != null) return -1;
if (e1 != null && e2 == null) return +1;
ILabelProvider labelProvider = (ILabelProvider)((ContentViewer)viewer).getLabelProvider();
String property1 = labelProvider.getText(e1);
String property2 = labelProvider.getText(e2);
return collator.compare(property1, property2);
}
}