Method ConvertToNative

ext/native.go:482–522

ConvertToNative implements the ref.Val interface method. CEL does not have a notion of pointers, so whether a field is a pointer or value is handled as part of this conversion step.

(typeDesc reflect.Type)

// CEL does not have a notion of pointers, so whether a field is a pointer or value
// is handled as part of this conversion step.
func (o *nativeObj) ConvertToNative(typeDesc reflect.Type) (any, error) {
	if o.refValue.Type() == typeDesc {
		return o.val, nil
	}
	if o.refValue.Kind() == reflect.Pointer && o.refValue.Type().Elem() == typeDesc {
		return o.refValue.Elem().Interface(), nil
	}
	if typeDesc.Kind() == reflect.Pointer && o.refValue.Type() == typeDesc.Elem() {
		ptr := reflect.New(typeDesc.Elem())
		ptr.Elem().Set(o.refValue)
		return ptr.Interface(), nil
	}
	switch typeDesc {
	case jsonValueType:
		jsonStruct, err := o.ConvertToNative(jsonStructType)
		if err != nil {
			return nil, err
		}
		return structpb.NewStructValue(jsonStruct.(*structpb.Struct)), nil
	case jsonStructType:
		refVal := reflect.Indirect(o.refValue)
		refType := refVal.Type()
		fields := make(map[string]*structpb.Value, refVal.NumField())
		for i := 0; i < refVal.NumField(); i++ {
			fieldType := refType.Field(i)
			fieldValue := refVal.Field(i)
			if !fieldValue.IsValid() || fieldValue.IsZero() {
				continue
			}
			fieldName := toFieldName(o.valType.fieldNameHandler, fieldType)
			fieldCELVal := o.NativeToValue(fieldValue.Interface())
			fieldJSONVal, err := fieldCELVal.ConvertToNative(jsonValueType)
			if err != nil {
				return nil, err
			}
			fields[fieldName] = fieldJSONVal.(*structpb.Value)
		}
		return &structpb.Struct{Fields: fields}, nil
	}
	return nil, fmt.Errorf("type conversion error from '%v' to '%v'", o.Type(), typeDesc)
}

// ConvertToType implements the ref.Val interface method.
func (o *nativeObj) ConvertToType(typeVal ref.Type) ref.Val {