package org.apache.maven.resolver.examples.guice;
   
   /*
    * 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.Collections;
  import java.util.HashSet;
  import java.util.Map;
  import java.util.Set;
  
  import javax.inject.Named;
  import javax.inject.Singleton;
  
  import org.apache.maven.model.building.DefaultModelBuilderFactory;
  import org.apache.maven.model.building.ModelBuilder;
  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.SnapshotMetadataGeneratorFactory;
  import org.apache.maven.repository.internal.VersionsMetadataGeneratorFactory;
  import org.eclipse.aether.connector.basic.BasicRepositoryConnectorFactory;
  import org.eclipse.aether.impl.ArtifactDescriptorReader;
  import org.eclipse.aether.impl.MetadataGeneratorFactory;
  import org.eclipse.aether.impl.VersionRangeResolver;
  import org.eclipse.aether.impl.VersionResolver;
  import org.eclipse.aether.impl.guice.AetherModule;
  import org.eclipse.aether.spi.connector.RepositoryConnectorFactory;
  import org.eclipse.aether.spi.connector.transport.TransporterFactory;
  import org.eclipse.aether.transport.file.FileTransporterFactory;
  import org.eclipse.aether.transport.http.ChecksumExtractor;
  import org.eclipse.aether.transport.http.HttpTransporterFactory;
  
  import com.google.inject.AbstractModule;
  import com.google.inject.Provides;
  import com.google.inject.name.Names;
  
  /**
   * Guice module for Demo Resolver snippets.
   *
   * Here, we assemble "complete" module by using {@link AetherModule} (see it's Javadoc) and adding bits from
   * Maven itself (binding those components that completes repository system).
   */
  class DemoResolverModule
      extends AbstractModule
  {
  
      @Override
      protected void configure()
      {
          // NOTE: see org.eclipse.aether.impl.guice.AetherModule Javadoc:
          // AetherModule alone is "ready-made" but incomplete. To have a complete resolver, we
          // actually need to bind the missing components making module complete.
          install( new AetherModule() );
  
          // make module "complete" by binding things not bound by AetherModule
          bind( ArtifactDescriptorReader.class ).to( DefaultArtifactDescriptorReader.class ).in( Singleton.class );
          bind( VersionResolver.class ).to( DefaultVersionResolver.class ).in( Singleton.class );
          bind( VersionRangeResolver.class ).to( DefaultVersionRangeResolver.class ).in( Singleton.class );
          bind( MetadataGeneratorFactory.class ).annotatedWith( Names.named( "snapshot" ) )
                                                .to( SnapshotMetadataGeneratorFactory.class ).in( Singleton.class );
  
          bind( MetadataGeneratorFactory.class ).annotatedWith( Names.named( "versions" ) )
                                                .to( VersionsMetadataGeneratorFactory.class ).in( Singleton.class );
  
          bind( RepositoryConnectorFactory.class ).annotatedWith( Names.named( "basic" ) )
                  .to( BasicRepositoryConnectorFactory.class );
          bind( TransporterFactory.class ).annotatedWith( Names.named( "file" ) ).to( FileTransporterFactory.class );
          bind( TransporterFactory.class ).annotatedWith( Names.named( "http" ) ).to( HttpTransporterFactory.class );
      }
  
      /**
       * Checksum extractors (none).
       */
      @Provides
      @Singleton
      Map<String, ChecksumExtractor> provideChecksumExtractors()
      {
          return Collections.emptyMap();
      }
  
      /**
       * Repository system connectors (needed for remote transport).
       */
     @Provides
     @Singleton
     Set<RepositoryConnectorFactory> provideRepositoryConnectorFactories(
             @Named( "basic" ) RepositoryConnectorFactory basic )
     {
         Set<RepositoryConnectorFactory> factories = new HashSet<>();
         factories.add( basic );
         return Collections.unmodifiableSet( factories );
     }
 
     /**
      * Repository system transporters (needed for remote transport).
      */
     @Provides
     @Singleton
     Set<TransporterFactory> provideTransporterFactories( @Named( "file" ) TransporterFactory file,
                                                          @Named( "http" ) TransporterFactory http )
     {
         Set<TransporterFactory> factories = new HashSet<>();
         factories.add( file );
         factories.add( http );
         return Collections.unmodifiableSet( factories );
     }
 
     /**
      * Repository metadata generators (needed for remote transport).
      */
     @Provides
     @Singleton
     Set<MetadataGeneratorFactory> provideMetadataGeneratorFactories(
             @Named( "snapshot" ) MetadataGeneratorFactory snapshot,
             @Named( "versions" ) MetadataGeneratorFactory versions )
     {
         Set<MetadataGeneratorFactory> factories = new HashSet<>( 2 );
         factories.add( snapshot );
         factories.add( versions );
         return Collections.unmodifiableSet( factories );
     }
 
     /**
      * Simple instance provider for model builder factory. Note: Maven 3.8.1 {@link ModelBuilder} is annotated
      * and would require much more.
      */
     @Provides
     ModelBuilder provideModelBuilder()
     {
         return new DefaultModelBuilderFactory().newInstance();
     }
 }