/*

     dsh-commandline  Command line parser based on typed arguments.

     Copyright (c) 2004-2014 held jointly by the individual authors.

     This library is free software; you can redistribute it and/or modify it

     under the terms of the GNU Lesser General Public License as published

     by the Free Software Foundation; either version 3 of the License, or (at

     your option) any later version.

     This library is distributed in the hope that it will be useful, but WITHOUT

     ANY WARRANTY; with out even the implied warranty of MERCHANTABILITY or

     FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public

     License for more details.

     You should have received a copy of the GNU Lesser General Public License

     along with this library;  if not, write to the Free Software Foundation,

     Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA.

     > http://www.fsf.org/licensing/licenses/lgpl.html

     > http://www.opensource.org/licenses/lgpl-license.php

 */

 package org.dishevelled.commandline.argument;

 import java.io.File;

 import java.util.Set;

 import java.util.HashSet;

 import java.util.StringTokenizer;

 import org.apache.commons.lang.StringUtils;

 /**

  * A file set argument.

  *

  * @author  Michael Heuer

  */

 public final class FileSetArgument

     extends AbstractArgument<Set<File>>

 {

     /**

      * Create a new file set argument.

      *

      * @param shortName short argument name

      * @param longName long argument name

      * @param description argument description

      * @param required <code>true</code> if this argument is required

      */

     public FileSetArgument(final String shortName,

                            final String longName,

                            final String description,

                            final boolean required)

     {

         super(shortName, longName, description, required);

     }

     /** {@inheritDoc} */

     protected Set<File> convert(final String s)

         throws Exception

     {

         Set<File> set = new HashSet<File>();

         StringTokenizer st = new StringTokenizer(s, ",");

         while (st.hasMoreTokens())

         {

             String token = StringUtils.stripToEmpty(st.nextToken());

             File f = new File(token);

             set.add(f);

         }

         return set;

     }

 }