<?php

/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */

/**
 * Image_Graph - PEAR PHP OO Graph Rendering Utility.
 *
 * PHP versions 4 and 5
 *
 * LICENSE: 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 2.1 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; without 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
 *
 * @category   Images
 * @package    Image_Graph
 * @subpackage DataPreprocessor
 * @author     Jesper Veggerby <pear.nosey@veggerby.dk>
 * @copyright  Copyright (C) 2003, 2004 Jesper Veggerby Hansen
 * @license    http://www.gnu.org/copyleft/lesser.html  LGPL License 2.1
 * @version    CVS: $Id$
 * @link       http://pear.php.net/package/Image_Graph
 */

/**
 * Data preprocessor used for preformatting a data.
 *
 * A data preprocessor is used in cases where a value from a dataset or label must be
 * displayed in another format or way than entered. This could for example be the need
 * to display X-values as a date instead of 1, 2, 3, .. or even worse unix-timestamps.
 * It could also be when a {@link Image_Graph_Marker_Value} needs to display values as percentages
 * with 1 decimal digit instead of the default formatting (fx. 12.01271 -> 12.0%).
 *
 * @category   Images
 * @package    Image_Graph
 * @subpackage DataPreprocessor
 * @author     Jesper Veggerby <pear.nosey@veggerby.dk>
 * @copyright  Copyright (C) 2003, 2004 Jesper Veggerby Hansen
 * @license    http://www.gnu.org/copyleft/lesser.html  LGPL License 2.1
 * @version    Release: @package_version@
 * @link       http://pear.php.net/package/Image_Graph
 * @abstract
 */
class Image_Graph_DataPreprocessor
{

    /**
     * Image_Graph_DataPreprocessor [Constructor].
     */
    function Image_Graph_DataPreprocessor()
    {
    }

    /**
     * Process the value
     *
     * @param var $value The value to process/format
     * @return string The processed value
     * @access private
     */
    function _process($value)
    {
        return $value;
    }

}

?>