Not.php

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<?php
/* Copyright (c) 2017 Stefan Hecken <stefan.hecken@concepts-and-training.de> Extended GPL, see docs/LICENSE */
 
namespace ILIAS\Validation\Constraints;
 
use ILIAS\Validation\Constraint;
use ILIAS\Data;
use ILIAS\Data\Result;
 
class Not extends Custom implements Constraint
{
    const ERROR_MESSAGE_PREFIX = "It is not the case that:";
 
    protected $constraint;
 
    public function __construct(Constraint $constraint, Data\Factory $data_factory)
    {
        $this->constraint = $constraint;
        parent::__construct(
            function ($value) {
                return !$this->constraint->accepts($value);
            },
            function ($value) {
                return self::ERROR_MESSAGE_PREFIX . ": " . $this->constraint->getErrorMessage($value);
            },
            $data_factory
        );
    }
}