<?php /** * 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; under version 2 * of the License (non-upgradable). * * 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. * * Copyright (c) 2007-2010 (original work) Public Research Centre Henri Tudor & University of Luxembourg) (under the project TAO-QUAL); * 2008-2010 (update and modification) Deutsche Institut für Internationale Pädagogische Forschung (under the project TAO-TRANSFER); * 2017 (update and modification) Open Assessment Technologies SA (under the project TAO-PRODUCT); */ use oat\generis\model\RulesRdf; /** * Short description of class core_kernel_rules_Rule * * @access public * @author firstname and lastname of author, <author@example.org> * @package generis */ class core_kernel_rules_Rule extends core_kernel_classes_Resource { // --- ASSOCIATIONS --- // --- ATTRIBUTES --- /** * Short description of attribute expression * * @access public * @var Expression */ public $expression = null; // --- OPERATIONS --- /** * Short description of method getExpression * * @access public * @author firstname and lastname of author, <author@example.org> * @return core_kernel_rules_Expression */ public function getExpression() { $returnValue = null; common_Logger::i('Evaluating rule ' . $this->getLabel() . '(' . $this->getUri() . ')', ['Generis Rule']); if (empty($this->expression)) { $property = new core_kernel_classes_Property(RulesRdf::PROPERTY_RULE_IF); $this->expression = new core_kernel_rules_Expression($this->getUniquePropertyValue($property)->getUri(), __METHOD__); } $returnValue = $this->expression; return $returnValue; } }