package org.apache.maven.artifact.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.manager.WagonManager;

 import org.apache.maven.artifact.repository.ArtifactRepository;

 import org.apache.maven.artifact.repository.metadata.ArtifactRepositoryMetadata;

 import org.apache.maven.artifact.repository.metadata.Metadata;

 import org.apache.maven.artifact.repository.metadata.RepositoryMetadata;

 import org.apache.maven.artifact.repository.metadata.RepositoryMetadataManager;

 import org.apache.maven.artifact.repository.metadata.RepositoryMetadataResolutionException;

 import org.apache.maven.artifact.repository.metadata.SnapshotArtifactRepositoryMetadata;

 import org.apache.maven.artifact.repository.metadata.Versioning;

 import org.codehaus.plexus.logging.AbstractLogEnabled;

 import java.util.List;

 /**

  * Describes a version transformation during artifact resolution.

  *

  * @author <a href="mailto:brett@apache.org">Brett Porter</a>

  * @version $Id: AbstractVersionTransformation.java 767322 2009-04-21 22:52:54Z jdcasey $

  * @todo try and refactor to remove abstract methods - not particular happy about current design

  */

 public abstract class AbstractVersionTransformation

     extends AbstractLogEnabled

     implements ArtifactTransformation

 {

     protected RepositoryMetadataManager repositoryMetadataManager;

     protected WagonManager wagonManager;

     protected String resolveVersion( Artifact artifact, ArtifactRepository localRepository, List<ArtifactRepository> remoteRepositories )

         throws RepositoryMetadataResolutionException

     {

         RepositoryMetadata metadata;

         // Don't use snapshot metadata for LATEST (which isSnapshot returns true for)

         if ( !artifact.isSnapshot() || Artifact.LATEST_VERSION.equals( artifact.getBaseVersion() ) )

         {

             metadata = new ArtifactRepositoryMetadata( artifact );

         }

         else

         {

             metadata = new SnapshotArtifactRepositoryMetadata( artifact );

         }

         repositoryMetadataManager.resolve( metadata, remoteRepositories, localRepository );

         artifact.addMetadata( metadata );

         Metadata repoMetadata = metadata.getMetadata();

         String version = null;

         if ( repoMetadata != null && repoMetadata.getVersioning() != null )

         {

             version = constructVersion( repoMetadata.getVersioning(), artifact.getBaseVersion() );

         }

         if ( version == null )

         {

             // use the local copy, or if it doesn't exist - go to the remote repo for it

             version = artifact.getBaseVersion();

         }

         // TODO: also do this logging for other metadata?

         // TODO: figure out way to avoid duplicated message

         if ( getLogger().isDebugEnabled() )

         {

             if ( !version.equals( artifact.getBaseVersion() ) )

             {

                 String message = artifact.getArtifactId() + ": resolved to version " + version;

                 if ( artifact.getRepository() != null )

                 {

                     message += " from repository " + artifact.getRepository().getId();

                 }

                 else

                 {

                     message += " from local repository";

                 }

                 getLogger().debug( message );

             }

             else

             {

                 // Locally installed file is newer, don't use the resolved version

                 getLogger().debug( artifact.getArtifactId() + ": using locally installed snapshot" );

             }

         }

         return version;

     }

     protected abstract String constructVersion( Versioning versioning, String baseVersion );

 }