Source code

001package org.apache.archiva.metadata.repository.storage.maven2;
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
021import org.apache.archiva.metadata.model.ArtifactMetadata;
022import org.apache.maven.artifact.versioning.DefaultArtifactVersion;
023
024import java.util.Comparator;
025
026/**
027 * @author Olivier Lamy
028 * @since 1.4-M3
029 */
030public class ArtifactMetadataVersionComparator
031    implements Comparator<ArtifactMetadata>
032{
033    public static ArtifactMetadataVersionComparator INSTANCE = new ArtifactMetadataVersionComparator();
034
035    @Override
036    public int compare( ArtifactMetadata o1, ArtifactMetadata o2 )
037    {
038        // sort by version (reverse), then ID
039        int result =
040            new DefaultArtifactVersion( o2.getVersion() ).compareTo( new DefaultArtifactVersion( o1.getVersion() ) );
041        return result != 0 ? result : o1.getId().compareTo( o2.getId() );
042    }
043}