package org.apache.maven.project;
   
   /*
    * 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.FileNotFoundException;
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.Collections;
  import java.util.List;
  
  import org.eclipse.aether.RepositorySystemSession;
  import org.eclipse.aether.artifact.Artifact;
  import org.eclipse.aether.impl.ArtifactResolver;
  import org.eclipse.aether.resolution.ArtifactRequest;
  import org.eclipse.aether.resolution.ArtifactResolutionException;
  import org.eclipse.aether.resolution.ArtifactResult;
  import org.eclipse.aether.transfer.ArtifactNotFoundException;
  
  import javax.inject.Named;
  import javax.inject.Singleton;
  
  /**
   * @author Benjamin Bentmann
   */
  @Named( "classpath" )
  @Singleton
  public class ClasspathArtifactResolver
      implements ArtifactResolver
  {
  
      public List<ArtifactResult> resolveArtifacts( RepositorySystemSession session,
                                                    Collection<? extends ArtifactRequest> requests )
          throws ArtifactResolutionException
      {
          List<ArtifactResult> results = new ArrayList<>();
  
          for ( ArtifactRequest request : requests )
          {
              ArtifactResult result = new ArtifactResult( request );
              results.add( result );
  
              Artifact artifact = request.getArtifact();
              if ( "maven-test".equals( artifact.getGroupId() ) )
              {
                  String scope = artifact.getArtifactId().substring( "scope-".length() );
  
                  try
                  {
                      artifact =
                          artifact.setFile( ProjectClasspathTest.getFileForClasspathResource( ProjectClasspathTest.dir
                              + "transitive-" + scope + "-dep.xml" ) );
                      result.setArtifact( artifact );
                  }
                  catch ( FileNotFoundException e )
                  {
                      throw new IllegalStateException( "Missing test POM for " + artifact );
                  }
              }
              else
              {
                  result.addException( new ArtifactNotFoundException( artifact, null ) );
                  throw new ArtifactResolutionException( results );
              }
          }
  
          return results;
      }
  
      public ArtifactResult resolveArtifact( RepositorySystemSession session, ArtifactRequest request )
          throws ArtifactResolutionException
      {
          return resolveArtifacts( session, Collections.singleton( request ) ).get( 0 );
      }
  
  }