001    package org.apache.archiva.admin.repository.utils;
002    /*
003     * Licensed to the Apache Software Foundation (ASF) under one
004     * or more contributor license agreements.  See the NOTICE file
005     * distributed with this work for additional information
006     * regarding copyright ownership.  The ASF licenses this file
007     * to you under the Apache License, Version 2.0 (the
008     * "License"); you may not use this file except in compliance
009     * with the License.  You may obtain a copy of the License at
010     *
011     *   http://www.apache.org/licenses/LICENSE-2.0
012     *
013     * Unless required by applicable law or agreed to in writing,
014     * software distributed under the License is distributed on an
015     * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
016     * KIND, either express or implied.  See the License for the
017     * specific language governing permissions and limitations
018     * under the License.
019     */
020    
021    import org.apache.archiva.admin.model.beans.AbstractRepository;
022    
023    import java.util.Comparator;
024    
025    /**
026     * @author Olivier Lamy
027     * @since 1.4-M1
028     */
029    public class RepositoryComparator
030        implements Comparator<AbstractRepository>
031    {
032        public int compare( AbstractRepository o1, AbstractRepository o2 )
033        {
034            if ( o1 == null && o2 == null )
035            {
036                return 0;
037            }
038    
039            if ( o1 == null )
040            {
041                return -1;
042            }
043    
044            if ( o2 == null )
045            {
046                return 1;
047            }
048    
049            return o1.getId().compareToIgnoreCase( o2.getId() );
050        }
051    }