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package org.apache.maven.repository.metadata;
/*
* 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.versioning.ArtifactVersion;
import org.apache.maven.artifact.versioning.DefaultArtifactVersion;
import org.codehaus.plexus.component.annotations.Component;
import org.codehaus.plexus.component.annotations.Configuration;
/**
* @author <a href="mailto:oleg@codehaus.org">Oleg Gusakov</a>
*
*/
@Component( role = GraphConflictResolutionPolicy.class )
public class DefaultGraphConflictResolutionPolicy
implements GraphConflictResolutionPolicy
{
/**
* artifact, closer to the entry point, is selected
*/
@Configuration( name = "closer-first", value = "true" )
private boolean closerFirst = true;
/**
* newer artifact is selected
*/
@Configuration( name = "newer-first", value = "true" )
private boolean newerFirst = true;
public MetadataGraphEdge apply( MetadataGraphEdge e1, MetadataGraphEdge e2 )
{
int depth1 = e1.getDepth();
int depth2 = e2.getDepth();
if ( depth1 == depth2 )
{
ArtifactVersion v1 = new DefaultArtifactVersion( e1.getVersion() );
ArtifactVersion v2 = new DefaultArtifactVersion( e2.getVersion() );
if ( newerFirst )
{
return v1.compareTo( v2 ) > 0 ? e1 : e2;
}
return v1.compareTo( v2 ) > 0 ? e2 : e1;
}
if ( closerFirst )
{
return depth1 < depth2 ? e1 : e2;
}
return depth1 < depth2 ? e2 : e1;
}
}
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