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]+/';
    }
}