/*  Copyright (C) 2003-2011 JabRef contributors.
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License along
    with this program; if not, write to the Free Software Foundation, Inc.,
    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
package net.sf.jabref.export.layout.format;

import net.sf.jabref.export.layout.LayoutFormatter;

/**
 * Formatter that returns the first page from the "pages" field, if set.
 *
 * For instance, if the pages field is set to "345-360" or "345--360",
 * this formatter will return "345".
 */
public class FirstPage implements LayoutFormatter {

    public String format(String s) {
        if (s == null)
			return "";
		String[] pageParts = s.split("[ \\-]+");
		if (pageParts.length == 2)
            return pageParts[0];
        else return s;

    }
}