/*
    * 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.
   */
  package org.apache.maven.repository.internal;
  
  import org.eclipse.aether.DefaultRepositorySystemSession;
  import org.eclipse.aether.artifact.DefaultArtifactType;
  import org.eclipse.aether.collection.DependencyGraphTransformer;
  import org.eclipse.aether.collection.DependencyManager;
  import org.eclipse.aether.collection.DependencySelector;
  import org.eclipse.aether.collection.DependencyTraverser;
  import org.eclipse.aether.util.artifact.DefaultArtifactTypeRegistry;
  import org.eclipse.aether.util.graph.manager.ClassicDependencyManager;
  import org.eclipse.aether.util.graph.selector.AndDependencySelector;
  import org.eclipse.aether.util.graph.selector.ExclusionDependencySelector;
  import org.eclipse.aether.util.graph.selector.OptionalDependencySelector;
  import org.eclipse.aether.util.graph.selector.ScopeDependencySelector;
  import org.eclipse.aether.util.graph.transformer.ChainedDependencyGraphTransformer;
  import org.eclipse.aether.util.graph.transformer.ConflictResolver;
  import org.eclipse.aether.util.graph.transformer.JavaDependencyContextRefiner;
  import org.eclipse.aether.util.graph.transformer.JavaScopeDeriver;
  import org.eclipse.aether.util.graph.transformer.JavaScopeSelector;
  import org.eclipse.aether.util.graph.transformer.NearestVersionSelector;
  import org.eclipse.aether.util.graph.transformer.SimpleOptionalitySelector;
  import org.eclipse.aether.util.graph.traverser.FatArtifactTraverser;
  import org.eclipse.aether.util.repository.SimpleArtifactDescriptorPolicy;
  
  /**
   * A utility class to assist in setting up a Maven-like repository system. <em>Note:</em> This component is meant to
   * assist those clients that employ the repository system outside of an IoC container, Maven plugins should instead
   * always use regular dependency injection to acquire the repository system.
   *
   * @author Benjamin Bentmann
   */
  public final class MavenRepositorySystemUtils {
  
      private MavenRepositorySystemUtils() {
          // hide constructor
      }
  
      /**
       * Creates a new Maven-like repository system session by initializing the session with values typical for
       * Maven-based resolution. In more detail, this method configures settings relevant for the processing of dependency
       * graphs, most other settings remain at their generic default value. Use the various setters to further configure
       * the session with authentication, mirror, proxy and other information required for your environment.
       *
       * @return The new repository system session, never {@code null}.
       */
      public static DefaultRepositorySystemSession newSession() {
          DefaultRepositorySystemSession session = new DefaultRepositorySystemSession();
  
          DependencyTraverser depTraverser = new FatArtifactTraverser();
          session.setDependencyTraverser(depTraverser);
  
          DependencyManager depManager = new ClassicDependencyManager();
          session.setDependencyManager(depManager);
  
          DependencySelector depFilter = new AndDependencySelector(
                  new ScopeDependencySelector("test", "provided"),
                  new OptionalDependencySelector(),
                  new ExclusionDependencySelector());
          session.setDependencySelector(depFilter);
  
          DependencyGraphTransformer transformer = new ConflictResolver(
                  new NearestVersionSelector(), new JavaScopeSelector(),
                  new SimpleOptionalitySelector(), new JavaScopeDeriver());
          transformer = new ChainedDependencyGraphTransformer(transformer, new JavaDependencyContextRefiner());
          session.setDependencyGraphTransformer(transformer);
  
          DefaultArtifactTypeRegistry stereotypes = new DefaultArtifactTypeRegistry();
          stereotypes.add(new DefaultArtifactType("pom"));
          stereotypes.add(new DefaultArtifactType("maven-plugin", "jar", "", "java"));
          stereotypes.add(new DefaultArtifactType("jar", "jar", "", "java"));
          stereotypes.add(new DefaultArtifactType("ejb", "jar", "", "java"));
          stereotypes.add(new DefaultArtifactType("ejb-client", "jar", "client", "java"));
          stereotypes.add(new DefaultArtifactType("test-jar", "jar", "tests", "java"));
          stereotypes.add(new DefaultArtifactType("javadoc", "jar", "javadoc", "java"));
          stereotypes.add(new DefaultArtifactType("java-source", "jar", "sources", "java", false, false));
          stereotypes.add(new DefaultArtifactType("war", "war", "", "java", false, true));
          stereotypes.add(new DefaultArtifactType("ear", "ear", "", "java", false, true));
          stereotypes.add(new DefaultArtifactType("rar", "rar", "", "java", false, true));
          stereotypes.add(new DefaultArtifactType("par", "par", "", "java", false, true));
          session.setArtifactTypeRegistry(stereotypes);
  
         session.setArtifactDescriptorPolicy(new SimpleArtifactDescriptorPolicy(true, true));
 
         return session;
     }
 }