Scott Baker | 1fe7273 | 2019-10-21 10:58:51 -0700 | [diff] [blame] | 1 | package dynamic |
| 2 | |
| 3 | import ( |
| 4 | "fmt" |
| 5 | |
| 6 | "github.com/golang/protobuf/proto" |
| 7 | |
| 8 | "github.com/jhump/protoreflect/codec" |
| 9 | "github.com/jhump/protoreflect/desc" |
| 10 | ) |
| 11 | |
| 12 | // SetExtension sets the given extension value. If the given message is not a |
| 13 | // dynamic message, the given extension may not be recognized (or may differ |
| 14 | // from the compiled and linked in version of the extension. So in that case, |
| 15 | // this function will serialize the given value to bytes and then use |
| 16 | // proto.SetRawExtension to set the value. |
| 17 | func SetExtension(msg proto.Message, extd *desc.FieldDescriptor, val interface{}) error { |
| 18 | if !extd.IsExtension() { |
| 19 | return fmt.Errorf("given field %s is not an extension", extd.GetFullyQualifiedName()) |
| 20 | } |
| 21 | |
| 22 | if dm, ok := msg.(*Message); ok { |
| 23 | return dm.TrySetField(extd, val) |
| 24 | } |
| 25 | |
| 26 | md, err := desc.LoadMessageDescriptorForMessage(msg) |
| 27 | if err != nil { |
| 28 | return err |
| 29 | } |
| 30 | if err := checkField(extd, md); err != nil { |
| 31 | return err |
| 32 | } |
| 33 | |
| 34 | val, err = validFieldValue(extd, val) |
| 35 | if err != nil { |
| 36 | return err |
| 37 | } |
| 38 | |
| 39 | var b codec.Buffer |
| 40 | b.SetDeterministic(defaultDeterminism) |
| 41 | if err := b.EncodeFieldValue(extd, val); err != nil { |
| 42 | return err |
| 43 | } |
| 44 | proto.SetRawExtension(msg, extd.GetNumber(), b.Bytes()) |
| 45 | return nil |
| 46 | } |