/** @param array of PntSqlFilter to be used in the entire application where applicable
	 * Default implementation is to store these filters in te session.
	 * SearchPages will try to use the global filters, propertypages and parts will not,
	 * they may have to be overridden or the domain model has to be made global filter sensitive. 
	 * Make sure to include eventual additional filter classes before calling this method
	 */
	function setGlobalFilters(&$filters) {
		$this->filters = $filters;

		$filterArrays = array();
		reset($filters);
		foreach ($filters as $key => $filter) {
			$filterArrays[$key] = $filter->getPersistArray();
		}
		$_SESSION[$this->getBaseUrl()]['pntGlobalFilters'] = $filterArrays;
	}