package org.eclipse.aether.internal.impl.synccontext.named;
   
   /*
    * 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.IOException;
  import java.io.UncheckedIOException;
  import java.nio.file.Path;
  import java.util.Collection;
  import java.util.stream.Collectors;
  
  import org.eclipse.aether.RepositorySystemSession;
  import org.eclipse.aether.artifact.Artifact;
  import org.eclipse.aether.metadata.Metadata;
  import org.eclipse.aether.util.DirectoryUtils;
  
  import static java.util.Objects.requireNonNull;
  
  /**
   * Wrapping {@link NameMapper} class that is file system friendly: it wraps another
   * {@link NameMapper} and resolves the resulting "file system friendly" names against local
   * repository basedir.
   *
   * @since 1.9.0
   */
  public class BasedirNameMapper implements NameMapper
  {
      private static final String CONFIG_PROP_LOCKS_DIR = "aether.syncContext.named.basedir.locksDir";
  
      private final NameMapper delegate;
  
      public BasedirNameMapper( final NameMapper delegate )
      {
          this.delegate = requireNonNull( delegate );
      }
  
      @Override
      public boolean isFileSystemFriendly()
      {
          return delegate.isFileSystemFriendly();
      }
  
      @Override
      public Collection<String> nameLocks( final RepositorySystemSession session,
                                           final Collection<? extends Artifact> artifacts,
                                           final Collection<? extends Metadata> metadatas )
      {
          try
          {
              final Path basedir = DirectoryUtils.resolveDirectory(
                      session, ".locks", CONFIG_PROP_LOCKS_DIR, false );
  
              return delegate.nameLocks( session, artifacts, metadatas ).stream()
                      .map( name -> basedir.resolve( name ).toAbsolutePath().toString() )
                      .collect( Collectors.toList() );
          }
          catch ( IOException e )
          {
              throw new UncheckedIOException( e );
          }
      }
  }