au.gov.ga.earthsci.discovery.ui.DiscoveryComparator.java Source code

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Here is the source code for au.gov.ga.earthsci.discovery.ui.DiscoveryComparator.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;

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

import au.gov.ga.earthsci.common.util.Util;
import au.gov.ga.earthsci.discovery.IDiscovery;
import au.gov.ga.earthsci.discovery.IDiscoveryService;

/**
 * {@link ViewerComparator} used to sort {@link IDiscovery}s in the discovery
 * part.
 * 
 * @author Michael de Hoog (michael.dehoog@ga.gov.au)
 */
public class DiscoveryComparator extends ViewerComparator {
    @Override
    public int compare(Viewer viewer, Object e1, Object e2) {
        if (e1 instanceof IDiscovery && e2 instanceof IDiscovery) {
            IDiscovery d1 = (IDiscovery) e1;
            IDiscovery d2 = (IDiscovery) e2;
            IDiscoveryService s1 = d1.getService();
            IDiscoveryService s2 = d2.getService();
            boolean empty1 = Util.isEmpty(s1.getName());
            boolean empty2 = Util.isEmpty(s2.getName());
            if (empty1 && empty2) {
                if (s1.getServiceURL() != null && s2.getServiceURL() != null) {
                    return s1.getServiceURL().toString().compareToIgnoreCase(s2.getServiceURL().toString());
                }
            }
            if (empty1) {
                return 1;
            }
            if (empty2) {
                return -1;
            }
            return s1.getName().compareToIgnoreCase(s2.getName());
        }
        return super.compare(viewer, e1, e2);
    }
}