package org.apache.maven.artifact.ant;

 /*

  * 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.util.Arrays;

 import java.util.Comparator;

 import java.util.List;

 import org.apache.tools.ant.util.FileNameMapper;

 import org.codehaus.plexus.util.StringUtils;

 /**

  * Ant filename mapper to remove version info from filename when copying dependencies.

  *

  * @author <a href="mailto:hboutemy@apache.org">Herve Boutemy</a>

  * @version $Id$

  */

 public class VersionMapper implements FileNameMapper, Comparator<String>

 {

     private List<String> versions;

     private String to;

     public String[] mapFileName( String sourceFileName )

     {

         String originalFileName = new java.io.File( sourceFileName ).getName();

         for ( String version : versions )

         {

             int index = originalFileName.indexOf( version );

             if ( index >= 0 )

             {

                 // remove version in artifactId-version(-classifier).type

                 String baseFilename = originalFileName.substring( 0, index - 1 );

                 String extension = originalFileName.substring( index + version.length() );

                 String path = sourceFileName.substring( 0, sourceFileName.length() - originalFileName.length() );

                 if ( "flatten".equals( to ) )

                 {

                     path = "";

                 }

                 return new String[] { path + baseFilename + extension };

             }

         }

         return new String[] { sourceFileName };

     }

     /**

      * Set the versions identifiers that this mapper can remove from filenames. The separator value used is path

      * separator, as used by dependencies task when setting <code>versionsId</code> property value.

      */

     public void setFrom( String from )

     {

         String[] split = StringUtils.split( from, File.pathSeparator );

         // sort, from lengthiest to smallest

         Arrays.sort( split, this );

         versions = Arrays.asList( split );

     }

     /**

      * By default, only filename is changed, but if this attribute is set to <code>flatten</code>, directory is

      * removed.

      */

     public void setTo( String to )

     {

         this.to = to;

     }

     public int compare( String s1, String s2 )

     {

         int lengthDiff = s2.length() - s1.length();

         return ( lengthDiff != 0 ) ? lengthDiff : s1.compareTo( s2 );

     }

 }