package org.apache.maven.artifact.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 java.io.File;
  import java.util.Collections;
  import java.util.Map;
  
  import org.apache.maven.artifact.metadata.ArtifactMetadata;
  import org.apache.maven.artifact.repository.ArtifactRepository;
  import org.apache.maven.artifact.repository.DefaultArtifactRepository;
  import org.codehaus.plexus.util.FileUtils;
  import org.eclipse.aether.RepositoryException;
  import org.eclipse.aether.metadata.AbstractMetadata;
  import org.eclipse.aether.metadata.MergeableMetadata;
  import org.eclipse.aether.metadata.Metadata;
  
  /**
   * <strong>Warning:</strong> This is an internal utility class that is only public for technical reasons, it is not part
   * of the public API. In particular, this class can be changed or deleted without prior notice.
   * 
   * @author Benjamin Bentmann
   */
  public final class MetadataBridge
      extends AbstractMetadata
      implements MergeableMetadata
  {
  
      private ArtifactMetadata metadata;
  
      private boolean merged;
  
      public MetadataBridge( ArtifactMetadata metadata )
      {
          this.metadata = metadata;
      }
  
      public void merge( File current, File result )
          throws RepositoryException
      {
          try
          {
              if ( current.exists() )
              {
                  FileUtils.copyFile( current, result );
              }
              ArtifactRepository localRepo = new MetadataRepository( result );
              metadata.storeInLocalRepository( localRepo, localRepo );
              merged = true;
          }
          catch ( Exception e )
          {
              throw new RepositoryException( e.getMessage(), e );
          }
      }
  
      public boolean isMerged()
      {
          return merged;
      }
  
      public String getGroupId()
      {
          return emptify( metadata.getGroupId() );
      }
  
      public String getArtifactId()
      {
          return metadata.storedInGroupDirectory() ? "" : emptify( metadata.getArtifactId() );
      }
  
      public String getVersion()
      {
          return metadata.storedInArtifactVersionDirectory() ? emptify( metadata.getBaseVersion() ) : "";
      }
  
      public String getType()
      {
          return metadata.getRemoteFilename();
      }
  
      private String emptify( String string )
     {
         return ( string != null ) ? string : "";
     }
 
     public File getFile()
     {
         return null;
     }
 
     public MetadataBridge setFile( File file )
     {
         return this;
     }
 
     public Nature getNature()
     {
         if ( metadata instanceof RepositoryMetadata )
         {
             switch ( ( (RepositoryMetadata) metadata ).getNature() )
             {
                 case RepositoryMetadata.RELEASE_OR_SNAPSHOT:
                     return Nature.RELEASE_OR_SNAPSHOT;
                 case RepositoryMetadata.SNAPSHOT:
                     return Nature.SNAPSHOT;
                 default:
                     return Nature.RELEASE;
             }
         }
         else
         {
             return Nature.RELEASE;
         }
     }
 
     public Map<String, String> getProperties()
     {
         return Collections.emptyMap();
     }
 
     @Override
     public Metadata setProperties( Map<String, String> properties )
     {
         return this;
     }
 
     @SuppressWarnings( "deprecation" )
     static class MetadataRepository
         extends DefaultArtifactRepository
     {
 
         private File metadataFile;
 
         public MetadataRepository( File metadataFile )
         {
             super( "local", "", null );
             this.metadataFile = metadataFile;
         }
 
         @Override
         public String getBasedir()
         {
             return metadataFile.getParent();
         }
 
         @Override
         public String pathOfLocalRepositoryMetadata( ArtifactMetadata metadata, ArtifactRepository repository )
         {
             return metadataFile.getName();
         }
 
     }
 
 }