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Command line parser based on typed arguments.

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/*

    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.util.Set;
import java.util.HashSet;
import java.util.StringTokenizer;

/**
 * A string set argument.
 *
 * @author  Michael Heuer
 */
public final class StringSetArgument
    extends AbstractArgument>
{

    /**
     * Create a new string set argument.
     *
     * @param shortName short argument name
     * @param longName long argument name
     * @param description argument description
     * @param required true if this argument is required
     */
    public StringSetArgument(final String shortName,
                             final String longName,
                             final String description,
                             final boolean required)
    {
        super(shortName, longName, description, required);
    }


    /** {@inheritDoc} */
    protected Set convert(final String s)
        throws Exception
    {
        Set set = new HashSet();
        StringTokenizer st = new StringTokenizer(s, ",");
        while (st.hasMoreTokens())
        {
            String token = st.nextToken();
            set.add(token);
        }
        return set;
    }
}