Shanty_Mongo_Document::hasRequirement PHP Method

    public function hasRequirement($property, $requirement)
    {
        if (!array_key_exists($property, $this->_docRequirements)) {
            return false;
        }
        switch ($requirement) {
            case 'Document':
            case 'DocumentSet':
                foreach ($this->_docRequirements[$property] as $requirementSearch => $params) {
                    $standardClass = 'Shanty_Mongo_' . $requirement;
                    // Return basic document or document set class if requirement matches
                    if ($requirementSearch == $requirement) {
                        return $standardClass;
                    }
                    // Find the document class
                    $matches = array();
                    preg_match("/^{$requirement}:([A-Za-z][\\w\\-]*)\$/", $requirementSearch, $matches);
                    if (!empty($matches)) {
                        if (!class_exists($matches[1])) {
                            require_once 'Shanty/Mongo/Exception.php';
                            throw new Shanty_Mongo_Exception("{$requirement} class of '{$matches[1]}' does not exist");
                        }
                        if (!is_subclass_of($matches[1], $standardClass)) {
                            require_once 'Shanty/Mongo/Exception.php';
                            throw new Shanty_Mongo_Exception("{$requirement} of '{$matches[1]}' sub is not a class of {$standardClass} does not exist");
                        }
                        return $matches[1];
                    }
                }
                return false;
        }
        return array_key_exists($requirement, $this->_docRequirements[$property]);
    }