kevintweber / Groundskeeper

        return true;

    }

    private function cleanAttributeBoolean(Configuration $configuration, Element $element, LoggerInterface $logger)

    {

        if ($this->value !== true) {

            $logger->debug('Within ' . $element . ', the attribute "' . $this->name . '" is a boolean attribute.  The value has been removed.');

            $this->value = true;

        }

        return true;

    }

    private function cleanAttributeInteger(Configuration $configuration, Element $element, LoggerInterface $logger)

    {

        return true;

    }

    private function cleanAttributeString(Configuration $configuration, Element $element, LoggerInterface $logger)

    {

        if ($this->value === true) {

            $logger->debug('Within ' . $element . ', the attribute "' . $this->name . '" requires a string value.  The value is invalid, therefore the attribute has been removed.');

            return false;

        }

        return true;

    }

    private function cleanAttributeUri(Configuration $configuration, Element $element, LoggerInterface $logger)

    {

        return true;

    }

    private function cleanAttributeUri(Configuration $configuration, Element $element, LoggerInterface $logger)

    {

        // Check for empty attribute.

        if ($this->value === true) {

            $logger->debug('Within ' . $element . ', the attribute "' . $this->name . '" requires a URI.  The value is invalid, therefore the attribute has been removed.');

            return false;

        }

        /// @todo

        return true;

    }

    public function __toString()

    {