package org.eclipse.aether.internal.impl.collect;
   
   /*
    * 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.ArrayList;
  import java.util.Collections;
  import java.util.Iterator;
  import java.util.List;
  
  import org.eclipse.aether.RepositorySystemSession;
  import org.eclipse.aether.collection.VersionFilter;
  import org.eclipse.aether.graph.Dependency;
  import org.eclipse.aether.repository.ArtifactRepository;
  import org.eclipse.aether.repository.RemoteRepository;
  import org.eclipse.aether.resolution.VersionRangeResult;
  import org.eclipse.aether.version.Version;
  import org.eclipse.aether.version.VersionConstraint;
  
  /**
   * Default implementation of {@link VersionFilter.VersionFilterContext}.
   * Internal helper class for collector implementations.
   */
  public final class DefaultVersionFilterContext
      implements VersionFilter.VersionFilterContext
  {
      private final RepositorySystemSession session;
  
      private Dependency dependency;
  
      VersionRangeResult result;
  
      private List<Version> versions;
  
      public DefaultVersionFilterContext( RepositorySystemSession session )
      {
          this.session = session;
      }
  
      public void set( Dependency dependency, VersionRangeResult result )
      {
          this.dependency = dependency;
          this.result = result;
          this.versions = new ArrayList<>( result.getVersions() );
      }
  
      public List<Version> get()
      {
          return new ArrayList<>( versions );
      }
  
      @Override
      public RepositorySystemSession getSession()
      {
          return session;
      }
  
      @Override
      public Dependency getDependency()
      {
          return dependency;
      }
  
      @Override
      public VersionConstraint getVersionConstraint()
      {
          return result.getVersionConstraint();
      }
  
      @Override
      public int getCount()
      {
          return versions.size();
      }
  
      @Override
      public ArtifactRepository getRepository( Version version )
      {
          return result.getRepository( version );
      }
  
      @Override
      public List<RemoteRepository> getRepositories()
     {
         return Collections.unmodifiableList( result.getRequest().getRepositories() );
     }
 
     @Override
     public Iterator<Version> iterator()
     {
         return versions.iterator();
     }
 
     @Override
     public String toString()
     {
         return dependency + " " + result.getVersions();
     }
 }