src/Marshaler/DynamoDb/ItemMarshaler.php
private function encodeValue($value, Field $field)
    {
        $type = $field->getType();

        if ($type->encodesToScalar()) {
            if ($type->isString()) {
                $value = $type->encode($value, $field, $this);
                if (empty($value)) {
                    return ['NULL' => true];
                } else {
                    return [self::TYPE_STRING => $value];
                }
            } elseif ($type->isNumeric()) {
                return [self::TYPE_NUMBER => (string)$type->encode($value, $field, $this)];
            } elseif ($type->isBoolean()) {
                return ['BOOL' => $type->encode($value, $field, $this)];
            } elseif ($type->isBinary()) {
                $value = $type->encode($value, $field, $this);
                if (empty($value)) {
                    return ['NULL' => true];
                } else {
                    return [self::TYPE_BINARY => $value];
                }
            }

            throw new EncodeValueFailed($value, $field, get_called_class() . ' has no handling for this value.');
        }

        return $type->encode($value, $field, $this);
    }
private function encodeValue($value, Field $field)
    {
        $type = $field->getType();

        if ($type->encodesToScalar()) {
            if ($type->isString()) {
                $value = $type->encode($value, $field, $this);
                if (empty($value)) {
                    return ['NULL' => true];
                } else {
                    return [self::TYPE_STRING => $value];
                }
            } elseif ($type->isNumeric()) {
                return [self::TYPE_NUMBER => (string)$type->encode($value, $field, $this)];
            } elseif ($type->isBoolean()) {
                return ['BOOL' => $type->encode($value, $field, $this)];
            } elseif ($type->isBinary()) {
                $value = $type->encode($value, $field, $this);
                if (empty($value)) {
                    return ['NULL' => true];
                } else {
                    return [self::TYPE_BINARY => $value];
                }
            }

            throw new EncodeValueFailed($value, $field, get_called_class() . ' has no handling for this value.');
        }

        return $type->encode($value, $field, $this);
    }
@param mixed $value
@param Field $field

@return mixed

@throws EncodeValueFailed