package org.apache.maven.repository.legacy.resolver.conflict;
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*/
import org.apache.maven.artifact.resolver.ResolutionNode;
import org.apache.maven.artifact.versioning.ArtifactVersion;
import org.apache.maven.artifact.versioning.OverConstrainedVersionException;
import org.codehaus.plexus.component.annotations.Component;
/**
* Resolves conflicting artifacts by always selecting the <em>newest</em> declaration. Newest is defined as the
* declaration whose version is greater according to <code>ArtifactVersion.compareTo</code>.
*
* @author <a href="mailto:markhobson@gmail.com">Mark Hobson</a>
* @version $Id: NewestConflictResolver.java 789077 2009-06-28 09:39:49Z jvanzyl $
* @see ArtifactVersion#compareTo(Object)
* @since 3.0
*/
@Component(role=ConflictResolver.class, hint="newest")
public class NewestConflictResolver
implements ConflictResolver
{
// ConflictResolver methods -----------------------------------------------
/*
* @see org.apache.maven.artifact.resolver.conflict.ConflictResolver#resolveConflict(org.apache.maven.artifact.resolver.ResolutionNode,
* org.apache.maven.artifact.resolver.ResolutionNode)
*/
public ResolutionNode resolveConflict( ResolutionNode node1,
ResolutionNode node2 )
{
try
{
ArtifactVersion version1 = node1.getArtifact().getSelectedVersion();
ArtifactVersion version2 = node2.getArtifact().getSelectedVersion();
return version1.compareTo( version2 ) > 0 ? node1 : node2;
}
catch ( OverConstrainedVersionException exception )
{
// TODO: log message or throw exception?
return null;
}
}
}