/**
* Get an instance of this class
*
* @return PHPExcel_Calculation
*/
public static function getInstance() {
if (! isset ( self::$_instance ) || is_null ( self::$_instance )) {
self::$_instance = new PHPExcel_Calculation ( );
}
return self::$_instance;
}
/**
* Get an instance of this class
*
* @access public
* @param PHPExcel $workbook Injected workbook for working with a PHPExcel object,
* or NULL to create a standalone claculation engine
* @return PHPExcel_Calculation
*/
public static function getInstance(PHPExcel $workbook = NULL)
{
if ($workbook !== NULL) {
if (isset(self::$_workbookSets[$workbook->getID()])) {
return self::$_workbookSets[$workbook->getID()];
}
return new PHPExcel_Calculation($workbook);
}
if (!isset(self::$_instance) || self::$_instance === NULL) {
self::$_instance = new PHPExcel_Calculation();
}
return self::$_instance;
}
/**
* Get an instance of this class
*
* @access public
* @param PHPExcel $workbook Injected workbook for working with a PHPExcel object,
* or NULL to create a standalone claculation engine
* @return PHPExcel_Calculation
*/
public static function getInstance(PHPExcel $workbook = NULL)
{
if ($workbook !== NULL) {
Yii::import('application.components.PHPExcel.PHPExcel.Calculation.PHPExcel_Calculation_Function');
if (isset(self::$_workbookSets[$workbook->getID()])) {
return self::$_workbookSets[$workbook->getID()];
}
return new PHPExcel_Calculation($workbook);
}
if (!isset(self::$_instance) || self::$_instance === NULL) {
self::$_instance = new PHPExcel_Calculation();
}
return self::$_instance;
}
