org.eclipse.dltk.tcl.activestatedebugger.preferences.InstrumentationPatternComparator.java Source code

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Here is the source code for org.eclipse.dltk.tcl.activestatedebugger.preferences.InstrumentationPatternComparator.java

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/*******************************************************************************
 * Copyright (c) 2008 xored software, Inc.
 *
 * 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:
 *     xored software, Inc. - initial API and Implementation (Alex Panchenko)
 *******************************************************************************/
package org.eclipse.dltk.tcl.activestatedebugger.preferences;

import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.viewers.ViewerComparator;

public class InstrumentationPatternComparator extends ViewerComparator {

    @Override
    public int category(Object element) {
        if (element instanceof ModelElementPattern) {
            return 1;
        } else {
            return 0;
        }
    }

    @Override
    public int compare(Viewer viewer, Object e1, Object e2) {
        int category1 = category(e1);
        int category2 = category(e2);
        if (category1 != category2) {
            return category1 - category2;
        }
        if (e1 instanceof ModelElementPattern && e2 instanceof ModelElementPattern) {
            String path1 = ((ModelElementPattern) e1).getHandleIdentifier();
            String path2 = ((ModelElementPattern) e2).getHandleIdentifier();
            if (path1 != null) {
                return path1.compareTo(path2);
            }
        }
        return super.compare(viewer, e1, e2);
    }

}