org.eclipse.emf.eef.runtime.ui.comparator.EMFModelViewerComparator.java Source code

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Here is the source code for org.eclipse.emf.eef.runtime.ui.comparator.EMFModelViewerComparator.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.ui.comparator;

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

/**
 * @author <a href="mailto:goulwen.lefur@obeo.fr">Goulwen Le Fur</a>
 */
public class EMFModelViewerComparator extends ViewerComparator {

    private final ITableLabelProvider labelProvider;

    private int columnIndex;

    private int order;

    public EMFModelViewerComparator(ITableLabelProvider labelProvider) {
        this.labelProvider = labelProvider;
        columnIndex = 0;
        order = 1;
    }

    public void doSort(int columnIndex) {
        this.columnIndex = columnIndex;
        order = -order;
    }

    public int compare(Viewer viewer, Object o1, Object o2) {
        final String text1 = labelProvider.getColumnText(o1, columnIndex);
        final String text2 = labelProvider.getColumnText(o2, columnIndex);
        int r = order * text1.compareTo(text2);
        if (r == 0) {
            String text11 = ""; //$NON-NLS-1$
            String text22 = ""; //$NON-NLS-1$
            if (columnIndex == 0) {
                text11 = labelProvider.getColumnText(o1, 1);
                text22 = labelProvider.getColumnText(o2, 1);
            }
            if (columnIndex == 1) {
                text11 = labelProvider.getColumnText(o1, 0);
                text22 = labelProvider.getColumnText(o2, 0);
            }
            if (text11 != null && text22 != null && text11 != "" && text22 != "") { //$NON-NLS-1$//$NON-NLS-2$
                return order * text11.compareToIgnoreCase(text22);
            }
        }
        return order * text1.compareToIgnoreCase(text2);
    }
}