package org.eclipse.aether.internal.impl;
   
   /*
    * 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 javax.inject.Inject;
  import javax.inject.Named;
  import javax.inject.Singleton;
  
  import org.eclipse.aether.RepositorySystemSession;
  import org.eclipse.aether.repository.LocalRepository;
  import org.eclipse.aether.repository.LocalRepositoryManager;
  import org.eclipse.aether.repository.NoLocalRepositoryManagerException;
  import org.eclipse.aether.spi.localrepo.LocalRepositoryManagerFactory;
  import org.eclipse.aether.spi.locator.Service;
  import org.eclipse.aether.spi.locator.ServiceLocator;
  import org.eclipse.aether.util.ConfigUtils;
  
  import static java.util.Objects.requireNonNull;
  
  /**
   * Creates enhanced local repository managers for repository types {@code "default"} or {@code "" (automatic)}. Enhanced
   * local repository manager is built upon the classical Maven 2.0 local repository structure but additionally keeps
   * track of from what repositories a cached artifact was resolved. Resolution of locally cached artifacts will be
   * rejected in case the current resolution request does not match the known source repositories of an artifact, thereby
   * emulating physically separated artifact caches per remote repository.
   */
  @Singleton
  @Named( "enhanced" )
  public class EnhancedLocalRepositoryManagerFactory
      implements LocalRepositoryManagerFactory, Service
  {
      private static final String CONFIG_PROP_TRACKING_FILENAME = "aether.enhancedLocalRepository.trackingFilename";
  
      private static final String DEFAULT_TRACKING_FILENAME = "_remote.repositories";
  
      private float priority = 10.0f;
  
      private LocalPathComposer localPathComposer;
  
      private TrackingFileManager trackingFileManager;
  
      private LocalPathPrefixComposerFactory localPathPrefixComposerFactory;
  
      public EnhancedLocalRepositoryManagerFactory()
      {
          // no arg ctor for ServiceLocator
      }
  
      @Inject
      public EnhancedLocalRepositoryManagerFactory( final LocalPathComposer localPathComposer,
                     final TrackingFileManager trackingFileManager,
                     final LocalPathPrefixComposerFactory localPathPrefixComposerFactory )
      {
          this.localPathComposer = requireNonNull( localPathComposer );
          this.trackingFileManager = requireNonNull( trackingFileManager );
          this.localPathPrefixComposerFactory = requireNonNull( localPathPrefixComposerFactory );
      }
  
      @Override
      public void initService( final ServiceLocator locator )
      {
          this.localPathComposer = requireNonNull( locator.getService( LocalPathComposer.class ) );
          this.trackingFileManager = requireNonNull( locator.getService( TrackingFileManager.class ) );
          this.localPathPrefixComposerFactory = new DefaultLocalPathPrefixComposerFactory();
      }
  
      @Override
      public LocalRepositoryManager newInstance( RepositorySystemSession session, LocalRepository repository )
          throws NoLocalRepositoryManagerException
      {
          requireNonNull( session, "session cannot be null" );
          requireNonNull( repository, "repository cannot be null" );
  
          String trackingFilename = ConfigUtils.getString( session, "", CONFIG_PROP_TRACKING_FILENAME );
          if ( trackingFilename.isEmpty() || trackingFilename.contains( "/" ) || trackingFilename.contains( "\\" )
                  || trackingFilename.contains( ".." ) )
          {
              trackingFilename = DEFAULT_TRACKING_FILENAME;
          }
  
          if ( "".equals( repository.getContentType() ) || "default".equals( repository.getContentType() ) )
          {
             return new EnhancedLocalRepositoryManager(
                     repository.getBasedir(),
                     localPathComposer,
                     trackingFilename,
                     trackingFileManager,
                     localPathPrefixComposerFactory.createComposer( session )
             );
         }
         else
         {
             throw new NoLocalRepositoryManagerException( repository );
         }
     }
 
     @Override
     public float getPriority()
     {
         return priority;
     }
 
     /**
      * Sets the priority of this component.
      *
      * @param priority The priority.
      * @return This component for chaining, never {@code null}.
      */
     public EnhancedLocalRepositoryManagerFactory setPriority( float priority )
     {
         this.priority = priority;
         return this;
     }
 
 }