package org.apache.maven.api.services;
   
   /*
    * 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.util.Collection;
  
  import org.apache.maven.api.ArtifactCoordinate;
  import org.apache.maven.api.Session;
  import org.apache.maven.api.annotations.Experimental;
  import org.apache.maven.api.annotations.Immutable;
  import org.apache.maven.api.annotations.Nonnull;
  import org.apache.maven.api.annotations.NotThreadSafe;
  
  import static org.apache.maven.api.services.BaseRequest.nonNull;
  
  /**
   * A request for resolving an artifact.
   *
   * @since 4.0
   */
  @Experimental
  @Immutable
  public interface ArtifactResolverRequest
  {
      @Nonnull
      Session getSession();
  
      @Nonnull
      Collection<? extends ArtifactCoordinate> getCoordinates();
  
      @Nonnull
      static ArtifactResolverRequestBuilder builder()
      {
          return new ArtifactResolverRequestBuilder();
      }
  
      @Nonnull
      static ArtifactResolverRequest build( @Nonnull Session session,
                                            @Nonnull Collection<? extends ArtifactCoordinate> coordinates )
      {
          return builder()
                  .session( nonNull( session, "session cannot be null" ) )
                  .coordinates( nonNull( coordinates, "coordinates cannot be null" ) )
                  .build();
      }
  
      @NotThreadSafe
      class ArtifactResolverRequestBuilder
      {
          Session session;
          Collection<? extends ArtifactCoordinate> coordinates;
  
          ArtifactResolverRequestBuilder()
          {
          }
  
          @Nonnull
          public ArtifactResolverRequestBuilder session( Session session )
          {
              this.session = session;
              return this;
          }
  
          @Nonnull
          public ArtifactResolverRequestBuilder coordinates( Collection<? extends ArtifactCoordinate> coordinates )
          {
              this.coordinates = coordinates;
              return this;
          }
  
          @Nonnull
          public ArtifactResolverRequest build()
          {
              return new DefaultArtifactResolverRequest( session, coordinates );
          }
  
          private static class DefaultArtifactResolverRequest extends BaseRequest implements ArtifactResolverRequest
          {
              @Nonnull
              private final Collection<? extends ArtifactCoordinate> coordinates;
  
              DefaultArtifactResolverRequest( @Nonnull Session session,
                                             @Nonnull Collection<? extends ArtifactCoordinate> coordinates )
             {
                 super( session );
                 this.coordinates = unmodifiable( nonNull( coordinates, "coordinates cannot be null" ) );
             }
 
             @Nonnull
             @Override
             public Collection<? extends ArtifactCoordinate> getCoordinates()
             {
                 return coordinates;
             }
         }
     }
 
 }