package org.apache.maven.shared.artifact.filter.collection;

 /*

  * 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 java.util.HashSet;

 import java.util.Iterator;

 import java.util.List;

 import java.util.Set;

 import org.apache.maven.artifact.Artifact;

 import org.apache.maven.artifact.factory.ArtifactFactory;

 import org.apache.maven.artifact.repository.ArtifactRepository;

 import org.apache.maven.artifact.resolver.filter.ScopeArtifactFilter;

 import org.apache.maven.model.Dependency;

 import org.apache.maven.project.MavenProject;

 import org.apache.maven.project.MavenProjectBuilder;

 import org.apache.maven.project.ProjectBuildingException;

 import org.apache.maven.project.artifact.InvalidDependencyVersionException;

 /**

  * This filter will exclude everything that is not a dependency of the selected artifact.

  * 

  * @author <a href="mailto:brianf@apache.org">Brian Fox</a>

  * @version $Id: ArtifactTransitivityFilter.java 744326 2009-02-14 01:09:41Z brianf $

  */

 public class ArtifactTransitivityFilter

     extends AbstractArtifactsFilter

 {

     Collection transitiveArtifacts;

     ArtifactFactory factory;

     ArtifactRepository local;

     List remote;

     public ArtifactTransitivityFilter( Artifact artifact, ArtifactFactory factory, ArtifactRepository local,

                                        List remote, MavenProjectBuilder builder )

         throws ProjectBuildingException, InvalidDependencyVersionException

     {

         this.factory = factory;

         this.local = local;

         this.remote = remote;

         Artifact rootArtifactPom =

             factory.createArtifact( artifact.getGroupId(), artifact.getArtifactId(), artifact.getVersion(), "", "pom" );

         MavenProject rootArtifactProject = builder.buildFromRepository( rootArtifactPom, remote, local );

         // load all the artifacts.

         transitiveArtifacts =

             rootArtifactProject.createArtifacts( this.factory, Artifact.SCOPE_TEST,

                                                  new ScopeArtifactFilter( Artifact.SCOPE_TEST ) );

     }

     public ArtifactTransitivityFilter( Dependency dependency, ArtifactFactory factory, ArtifactRepository local,

                                        List remote, MavenProjectBuilder builder )

         throws ProjectBuildingException, InvalidDependencyVersionException

     {

         this.factory = factory;

         this.local = local;

         this.remote = remote;

         Artifact rootArtifactPom =

             factory.createArtifact( dependency.getGroupId(), dependency.getArtifactId(), dependency.getVersion(), "",

                                     "pom" );

         MavenProject rootArtifactProject = builder.buildFromRepository( rootArtifactPom, remote, local );

         // load all the artifacts.

         transitiveArtifacts =

             rootArtifactProject.createArtifacts( this.factory, Artifact.SCOPE_TEST,

                                                  new ScopeArtifactFilter( Artifact.SCOPE_TEST ) );

     }

     public Set filter( Set artifacts )

     {

         Set result = new HashSet();

         Iterator iterator = artifacts.iterator();

         while ( iterator.hasNext() )

         {

             Artifact artifact = (Artifact) iterator.next();

             if ( artifactIsATransitiveDependency( artifact ) )

             {

                 result.add( artifact );

             }

         }

         return result;

     }

     /**

      * Compares the artifact to the list of dependencies to see if it is directly included by this project

      * 

      * @param artifact representing the item to compare.

      * @return true if artifact is a transitive dependency

      */

     public boolean artifactIsATransitiveDependency( Artifact artifact )

     {

         boolean result = false;

         Iterator iterator = transitiveArtifacts.iterator();

         while ( iterator.hasNext() )

         {

             Artifact trans = (Artifact) iterator.next();

             if ( trans.getGroupId().equals( artifact.getGroupId() ) &&

                 trans.getArtifactId().equals( artifact.getArtifactId() ) )

             {

                 result = true;

                 break;

             }

         }

         return result;

     }

 }