gov.nasa.ensemble.common.ui.treetable.TreeTableViewerComparator.java Source code

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Here is the source code for gov.nasa.ensemble.common.ui.treetable.TreeTableViewerComparator.java

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/*******************************************************************************
 * Copyright 2014 United States Government as represented by the
 * Administrator of the National Aeronautics and Space Administration.
 * All Rights Reserved.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 ******************************************************************************/
package gov.nasa.ensemble.common.ui.treetable;

import java.util.Comparator;

import org.apache.log4j.Logger;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.viewers.ViewerComparator;

public class TreeTableViewerComparator extends ViewerComparator {

    private final boolean reverse;
    private final ITreeTableColumn column;

    public TreeTableViewerComparator(ITreeTableColumn column, boolean reverse) {
        super();
        this.column = column;
        this.reverse = reverse;
    }

    @Override
    @SuppressWarnings("unchecked")
    public int compare(Viewer viewer, Object e1, Object e2) {
        Object facet1 = column.getFacet(e1);
        Object facet2 = column.getFacet(e2);
        Comparator comparator = column.getComparator();
        int result = 0;
        try {
            result = comparator.compare(facet1, facet2);
        } catch (ThreadDeath td) {
            throw td;
        } catch (Throwable t) {
            Logger.getLogger(TreeTableViewerComparator.class).error("column comparator", t);
        }
        if (result == 0) {
            ((TreeTableViewer) viewer).getDefaultComparator().compare(e1, e2);
        }
        return (reverse ? -result : result);
    }

}