// marshalValue returns a roachpb.Value initialized from the source
// interface{}, returning an error if the types are not compatible.
func marshalValue(v interface{}) (roachpb.Value, error) {
var r roachpb.Value
// Handle a few common types via a type switch.
switch t := v.(type) {
case *roachpb.Value:
return *t, nil
case nil:
return r, nil
case bool:
r.SetBool(t)
return r, nil
case string:
r.SetBytes([]byte(t))
return r, nil
case []byte:
r.SetBytes(t)
return r, nil
case inf.Dec:
err := r.SetDecimal(&t)
return r, err
case roachpb.Key:
r.SetBytes([]byte(t))
return r, nil
case time.Time:
r.SetTime(t)
return r, nil
case duration.Duration:
err := r.SetDuration(t)
return r, err
case proto.Message:
err := r.SetProto(t)
return r, err
case roachpb.Value:
panic("unexpected type roachpb.Value (use *roachpb.Value)")
}
// Handle all of the Go primitive types besides struct and pointers. This
// switch also handles types based on a primitive type (e.g. "type MyInt
// int").
switch v := reflect.ValueOf(v); v.Kind() {
case reflect.Bool:
r.SetBool(v.Bool())
return r, nil
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
r.SetInt(v.Int())
return r, nil
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
r.SetInt(int64(v.Uint()))
return r, nil
case reflect.Float32, reflect.Float64:
r.SetFloat(v.Float())
return r, nil
case reflect.String:
r.SetBytes([]byte(v.String()))
return r, nil
}
return r, fmt.Errorf("unable to marshal %T: %v", v, v)
}