ilAssLacAnswerOfQuestionExpression.php

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<?php

include_once "Modules/TestQuestionPool/classes/questions/LogicalAnswerCompare/Expressions/ilAssLacAbstractExpression.php";
require_once "Modules/TestQuestionPool/classes/questions/LogicalAnswerCompare/Expressions/ilAssLacQuestionExpressionInterface.php";

class ilAssLacAnswerOfQuestionExpression extends ilAssLacAbstractExpression implements ilAssLacQuestionExpressionInterface
{

//      public static $pattern = '/Q[0-9]+([^\[|0-9]|$)/';
        public static $pattern = '/(Q\d+)(?=\=|<|>|\s|$)/';

        public static $identifier = "Qn";

        protected $question_index;

        protected function setMatches($matches)
        {
                $this->question_index = $matches[0][0];
        }

        public function getQuestionIndex()
        {
                return $this->question_index;
        }

        public function getValue()
        {
                return "Q" . $this->question_index;
        }

        public function getDescription()
        {
                return "Frage " . $this->question_index . " ";
        }

        protected function getPattern()
        {
                return '/-?[0-9]+/';
        }
}