au.gov.ga.earthsci.discovery.ui.preferences.DiscoveryServiceComparator.java Source code

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Here is the source code for au.gov.ga.earthsci.discovery.ui.preferences.DiscoveryServiceComparator.java

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/*******************************************************************************
 * Copyright 2013 Geoscience Australia
 * 
 * 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 au.gov.ga.earthsci.discovery.ui.preferences;

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

import au.gov.ga.earthsci.discovery.IDiscoveryService;

/**
 * {@link ViewerComparator} used for sorting {@link IDiscoveryService} elements
 * in a {@link Viewer}.
 * 
 * @author Michael de Hoog (michael.dehoog@ga.gov.au)
 */
public class DiscoveryServiceComparator extends ViewerComparator {
    private boolean descending = false;
    private DiscoveryServiceViewerColumn column = DiscoveryServiceViewerColumn.NAME;

    @Override
    public int compare(Viewer viewer, Object e1, Object e2) {
        if (!(e1 instanceof IDiscoveryService && e2 instanceof IDiscoveryService)) {
            return super.compare(viewer, e1, e2);
        }

        IDiscoveryService d1 = (IDiscoveryService) e1;
        IDiscoveryService d2 = (IDiscoveryService) e2;
        return column.compare(d1, d2, descending);
    }

    public boolean isDescending() {
        return descending;
    }

    public void setDescending(boolean ascending) {
        this.descending = ascending;
    }

    public DiscoveryServiceViewerColumn getColumn() {
        return column;
    }

    public void setColumn(DiscoveryServiceViewerColumn column) {
        this.column = column;
    }
}