package org.apache.maven.shared.dependency.graph.internal;

 /*

  * 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.List;

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

 import org.apache.maven.project.MavenProject;

 import org.apache.maven.shared.dependency.graph.DependencyGraphBuilder;

 import org.apache.maven.shared.dependency.graph.DependencyGraphBuilderException;

 import org.apache.maven.shared.dependency.graph.DependencyNode;

 import org.apache.maven.shared.dependency.tree.DependencyTreeBuilder;

 import org.apache.maven.shared.dependency.tree.DependencyTreeBuilderException;

 import org.codehaus.plexus.component.annotations.Component;

 import org.codehaus.plexus.component.annotations.Requirement;

 /**

  * Wrapper around Maven 2 dependency tree builder.

  *

  * @see DependencyTreeBuilder

  * @author Hervé Boutemy

  * @since 2.0

  */

 @Component( role = DependencyGraphBuilder.class, hint = "maven2" )

 public class Maven2DependencyGraphBuilder

     implements DependencyGraphBuilder

 {

     @Requirement

     private DependencyTreeBuilder treeBuilder;

     public DependencyNode buildDependencyGraph( MavenProject project, ArtifactFilter filter )

         throws DependencyGraphBuilderException

     {

         try

         {

             return buildDependencyNode( null, treeBuilder.buildDependencyTree( project ), filter );

         }

         catch ( DependencyTreeBuilderException e )

         {

             throw new DependencyGraphBuilderException( e.getMessage(), e );

         }

     }

     private DependencyNode buildDependencyNode( DependencyNode parent,

                                                 org.apache.maven.shared.dependency.tree.DependencyNode node,

                                                 ArtifactFilter filter )

     {

         String versionSelectedFromRange = null;

         if ( node.getVersionSelectedFromRange() != null )

         {

             versionSelectedFromRange = node.getVersionSelectedFromRange().toString();

         }

         DefaultDependencyNode current =

             new DefaultDependencyNode( parent, node.getArtifact(), node.getPremanagedVersion(),

                                        node.getPremanagedScope(), versionSelectedFromRange );

         List<DependencyNode> nodes = new ArrayList<DependencyNode>( node.getChildren().size() );

         for ( org.apache.maven.shared.dependency.tree.DependencyNode child : node.getChildren() )

         {

             if ( child.getState() != org.apache.maven.shared.dependency.tree.DependencyNode.INCLUDED )

             {

                 // only included nodes are supported in the graph API

                 continue;

             }

             if ( ( filter == null ) || filter.include( child.getArtifact() ) )

             {

                 nodes.add( buildDependencyNode( current, child, filter ) );

             }

         }

         current.setChildren( Collections.unmodifiableList( nodes ) );

         return current;

     }

 }