maven-compat/src/main/java/org/apache/maven/repository/legacy/resolver/transform/LatestArtifactTransformation.java

package org.apache.maven.repository.legacy.resolver.transform;

/*
 * 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.Artifact;
import org.apache.maven.artifact.repository.ArtifactRepository;
import org.apache.maven.artifact.repository.RepositoryRequest;
import org.apache.maven.artifact.repository.metadata.RepositoryMetadataResolutionException;
import org.apache.maven.artifact.repository.metadata.Versioning;
import org.apache.maven.artifact.resolver.ArtifactNotFoundException;
import org.apache.maven.artifact.resolver.ArtifactResolutionException;
import org.codehaus.plexus.component.annotations.Component;

/**
 * Describes a version transformation during artifact resolution - "latest" type
 */
@Component( role = ArtifactTransformation.class, hint = "latest" )
public class LatestArtifactTransformation
    extends AbstractVersionTransformation
{

    public void transformForResolve( Artifact artifact, RepositoryRequest request )
        throws ArtifactResolutionException, ArtifactNotFoundException
    {
        if ( Artifact.LATEST_VERSION.equals( artifact.getVersion() ) )
        {
            try
            {
                String version = resolveVersion( artifact, request );
                if ( Artifact.LATEST_VERSION.equals( version ) )
                {
                    throw new ArtifactNotFoundException( "Unable to determine the latest version", artifact );
                }

                artifact.setBaseVersion( version );
                artifact.updateVersion( version, request.getLocalRepository() );
            }
            catch ( RepositoryMetadataResolutionException e )
            {
                throw new ArtifactResolutionException( e.getMessage(), artifact, e );
            }
        }
    }

    public void transformForInstall( Artifact artifact, ArtifactRepository localRepository )
    {
        // metadata is added via addPluginArtifactMetadata
    }

    public void transformForDeployment( Artifact artifact, ArtifactRepository remoteRepository,
                                        ArtifactRepository localRepository )
    {
        // metadata is added via addPluginArtifactMetadata
    }

    protected String constructVersion( Versioning versioning, String baseVersion )
    {
        return versioning.getLatest();
    }
}