package org.apache.archiva.repository.maven2;
   
   /*
    * 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.archiva.dependency.tree.maven2.ArchivaRepositoryConnectorFactory;
  import org.apache.maven.repository.internal.DefaultArtifactDescriptorReader;
  import org.apache.maven.repository.internal.DefaultVersionRangeResolver;
  import org.apache.maven.repository.internal.DefaultVersionResolver;
  import org.apache.maven.repository.internal.MavenRepositorySystemUtils;
  import org.eclipse.aether.DefaultRepositorySystemSession;
  import org.eclipse.aether.RepositorySystem;
  import org.eclipse.aether.RepositorySystemSession;
  import org.eclipse.aether.collection.DependencySelector;
  import org.eclipse.aether.impl.ArtifactDescriptorReader;
  import org.eclipse.aether.impl.DefaultServiceLocator;
  import org.eclipse.aether.impl.VersionRangeResolver;
  import org.eclipse.aether.impl.VersionResolver;
  import org.eclipse.aether.internal.impl.SimpleLocalRepositoryManagerFactory;
  import org.eclipse.aether.repository.LocalRepository;
  import org.eclipse.aether.repository.LocalRepositoryManager;
  import org.eclipse.aether.repository.NoLocalRepositoryManagerException;
  import org.eclipse.aether.spi.connector.RepositoryConnectorFactory;
  import org.eclipse.aether.util.graph.selector.AndDependencySelector;
  import org.eclipse.aether.util.graph.selector.ExclusionDependencySelector;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.springframework.stereotype.Service;
  
  import javax.annotation.PostConstruct;
  
  /**
   * Some static utility methods that are used by different classes.
   */
  @Service("mavenSystemManager")
  public class MavenSystemManager {
  
      static Logger log = LoggerFactory.getLogger(MavenSystemManager.class);
  
      private DefaultServiceLocator locator;
      private RepositorySystem system;
  
      @PostConstruct
      private synchronized void init() {
          locator = newLocator();
          system = newRepositorySystem(locator);
  
      }
  
      /**
       * Creates a new aether repository system session for the given directory and assigns the
       * repository to this session.
       *
       * @param localRepoDir The repository directory
       * @return The newly created session object.
       */
      public static RepositorySystemSession newRepositorySystemSession(String localRepoDir) {
          DefaultRepositorySystemSession session = MavenRepositorySystemUtils.newSession();
  
          LocalRepository repo = new LocalRepository(localRepoDir);
  
          DependencySelector depFilter = new AndDependencySelector(new ExclusionDependencySelector());
          session.setDependencySelector(depFilter);
          SimpleLocalRepositoryManagerFactory repFactory = new SimpleLocalRepositoryManagerFactory();
          try {
              LocalRepositoryManager manager = repFactory.newInstance(session, repo);
              session.setLocalRepositoryManager(manager);
          } catch (NoLocalRepositoryManagerException e) {
              log.error("Could not assign the repository manager to the session: {}", e.getMessage(), e);
          }
  
          return session;
      }
  
      public RepositorySystem getRepositorySystem() {
          return system;
      }
  
      public DefaultServiceLocator getLocator() {
          return locator;
      }
  
      /**
      * Finds the
      *
      * @return
      */
     public static RepositorySystem newRepositorySystem(DefaultServiceLocator locator) {
         return locator.getService(RepositorySystem.class);
     }
 
     public static DefaultServiceLocator newLocator() {
         DefaultServiceLocator locator = MavenRepositorySystemUtils.newServiceLocator();
 
         locator.addService(RepositoryConnectorFactory.class,
                 ArchivaRepositoryConnectorFactory.class);// FileRepositoryConnectorFactory.class );
         locator.addService(VersionResolver.class, DefaultVersionResolver.class);
         locator.addService(VersionRangeResolver.class, DefaultVersionRangeResolver.class);
         locator.addService(ArtifactDescriptorReader.class, DefaultArtifactDescriptorReader.class);
 
         return locator;
     }
 }