001    package org.apache.archiva.configuration.functors;
002    
003    /*
004     * Licensed to the Apache Software Foundation (ASF) under one
005     * or more contributor license agreements.  See the NOTICE file
006     * distributed with this work for additional information
007     * regarding copyright ownership.  The ASF licenses this file
008     * to you under the Apache License, Version 2.0 (the
009     * "License"); you may not use this file except in compliance
010     * with the License.  You may obtain a copy of the License at
011     *
012     *  http://www.apache.org/licenses/LICENSE-2.0
013     *
014     * Unless required by applicable law or agreed to in writing,
015     * software distributed under the License is distributed on an
016     * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
017     * KIND, either express or implied.  See the License for the
018     * specific language governing permissions and limitations
019     * under the License.
020     */
021    
022    import org.apache.archiva.configuration.ProxyConnectorConfiguration;
023    
024    import java.util.Comparator;
025    
026    /**
027     *
028     * @deprecated ProxyConnectorConfigurationOrderComparator
029     */
030    public class ProxyConnectorConfigurationOrderComparator
031        implements Comparator<ProxyConnectorConfiguration>
032    {
033        private static ProxyConnectorConfigurationOrderComparator INSTANCE =
034            new ProxyConnectorConfigurationOrderComparator();
035    
036        public int compare( ProxyConnectorConfiguration o1, ProxyConnectorConfiguration o2 )
037        {
038            if ( o1 == null && o2 == null )
039            {
040                return 0;
041            }
042    
043            // Ensure null goes to end of list.
044            if ( o1 == null && o2 != null )
045            {
046                return 1;
047            }
048    
049            if ( o1 != null && o2 == null )
050            {
051                return -1;
052            }
053    
054            // Ensure 0 (unordered) goes to end of list.
055            if ( o1.getOrder() == 0 && o2.getOrder() != 0 )
056            {
057                return 1;
058            }
059    
060            if ( o1.getOrder() != 0 && o2.getOrder() == 0 )
061            {
062                return -1;
063            }
064    
065            return o1.getOrder() - o2.getOrder();
066        }
067    
068        public static ProxyConnectorConfigurationOrderComparator getInstance()
069        {
070            return INSTANCE;
071        }
072    }