AttributeValue::value PHP Method

    public function value($default = null)
    {
        switch ($this->attribute->type) {
            case Attribute::TYPE_DROPDOWN:
                return is_null($this->option_value) ? null : (int) $this->option_value;
            case Attribute::TYPE_CHECKBOX_LIST:
                return is_null($this->option_value) ? null : (int) $this->option_value;
            case Attribute::TYPE_CHECKBOX:
                return (bool) $this->number_value;
            case Attribute::TYPE_NUMBER:
                return is_null($this->number_value) ? null : (double) $this->number_value;
            case Attribute::TYPE_TEXT:
                return $this->text_value;
            case Attribute::TYPE_SHORT_TEXT:
                return $this->string_value;
            case Attribute::TYPE_FILE:
                return $this->string_value;
            default:
                return $default;
        }
    }