package org.apache.maven.index.locator;

 /*

  * 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.io.File;

 import java.io.FileInputStream;

 import java.io.IOException;

 import org.apache.maven.index.ArtifactContext.ModelReader;

 import org.apache.maven.index.artifact.ArtifactPackagingMapper;

 import org.apache.maven.index.artifact.Gav;

 import org.apache.maven.index.artifact.GavCalculator;

 import org.apache.maven.model.Model;

 /**

  * Artifact locator.

  * 

  * @author Damian Bradicich

  */

 public class ArtifactLocator

     implements GavHelpedLocator

 {

     private final ArtifactPackagingMapper mapper;

     public ArtifactLocator( ArtifactPackagingMapper mapper )

     {

         this.mapper = mapper;

     }

     public File locate( File source, GavCalculator gavCalculator, Gav gav )

     {

         // if we don't have this data, nothing we can do

         if ( source == null || !source.exists() || gav == null || gav.getArtifactId() == null

             || gav.getVersion() == null )

         {

             return null;

         }

         try

         {

             // need to read the pom model to get packaging

             Model model = new ModelReader().readModel( new FileInputStream( source ) );

             if ( model == null )

             {

                 return null;

             }

             // now generate the artifactname

             String artifactName =

                 gav.getArtifactId() + "-" + gav.getVersion() + "."

                     + mapper.getExtensionForPackaging( model.getPackaging() );

             File artifact = new File( source.getParent(), artifactName );

             if ( !artifact.exists() )

             {

                 return null;

             }

             return artifact;

         }

         catch ( IOException e )

         {

             return null;

         }

     }

 }