/*
    * 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.api.services;
  
  import static org.apache.maven.api.services.BaseRequest.nonNull;
  
  import java.util.Collection;
  import java.util.Collections;
  import org.apache.maven.api.Artifact;
  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 org.apache.maven.api.annotations.Nullable;
  
  /**
   * A request for installing one or more artifacts in the local repository.
   *
   * @since 4.0
   */
  @Experimental
  @Immutable
  public interface ArtifactInstallerRequest {
  
      @Nonnull
      Session getSession();
  
      @Nonnull
      Collection<Artifact> getArtifacts();
  
      @Nonnull
      static ArtifactInstallerRequestBuilder builder() {
          return new ArtifactInstallerRequestBuilder();
      }
  
      @Nonnull
      static ArtifactInstallerRequest build(Session session, Collection<Artifact> artifacts) {
          return builder()
                  .session(nonNull(session, "session cannot be null"))
                  .artifacts(nonNull(artifacts, "artifacts cannot be null"))
                  .build();
      }
  
      @NotThreadSafe
      class ArtifactInstallerRequestBuilder {
          Session session;
          Collection<Artifact> artifacts = Collections.emptyList();
  
          ArtifactInstallerRequestBuilder() {}
  
          @Nonnull
          public ArtifactInstallerRequestBuilder session(@Nonnull Session session) {
              this.session = session;
              return this;
          }
  
          @Nonnull
          public ArtifactInstallerRequestBuilder artifacts(@Nullable Collection<Artifact> artifacts) {
              this.artifacts = artifacts != null ? artifacts : Collections.emptyList();
              return this;
          }
  
          @Nonnull
          public ArtifactInstallerRequest build() {
              return new DefaultArtifactInstallerRequest(session, artifacts);
          }
  
          static class DefaultArtifactInstallerRequest extends BaseRequest implements ArtifactInstallerRequest {
  
              private final Collection<Artifact> artifacts;
  
              DefaultArtifactInstallerRequest(@Nonnull Session session, @Nonnull Collection<Artifact> artifacts) {
                  super(session);
                  this.artifacts = unmodifiable(nonNull(artifacts, "artifacts cannot be null"));
              }
  
              @Nonnull
              @Override
              public Collection<Artifact> getArtifacts() {
                  return artifacts;
              }
          }
     }
 }