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<?php
/**
* TDataValueFormatter class file
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @link http://www.pradosoft.com/
* @copyright Copyright © 2005 PradoSoft
* @license http://www.pradosoft.com/license/
* @version $Revision: $ $Date: $
* @package System.Util
*/
/**
* TDataValueFormatter class
*
* TDataValueFormatter is a utility class that formats a data value
* according to a format string.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @version $Revision: $ $Date: $
* @package System.Util
* @since 3.0
*/
class TDataValueFormatter
{
/**
* Formats the text value according to a format string.
* If the format string is empty, the original value is converted into
* a string and returned.
* If the format string starts with '#', the string is treated as a PHP expression
* within which the token '{0}' is translated with the data value to be formated.
* Otherwise, the format string and the data value are passed
* as the first and second parameters in {@link sprintf}.
* @param string format string
* @param mixed the data associated with the cell
* @param TComponent the context to evaluate the expression
* @return string the formatted result
*/
public static function format($formatString,$value,$context=null)
{
if($formatString==='')
return TPropertyValue::ensureString($value);
else if($formatString[0]==='#')
{
$expression=strtr(substr($formatString,1),array('{0}'=>'$value'));
if($context instanceof TComponent)
return $context->evaluateExpression($expression);
else
{
try
{
if(eval("\$result=$expression;")===false)
throw new Exception('');
return $result;
}
catch(Exception $e)
{
throw new TInvalidOperationException('datavalueformatter_expression_invalid',$expression,$e->getMessage());
}
}
}
else
return sprintf($formatString,$value);
}
}
?>
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