47 lines
1.2 KiB
Go
47 lines
1.2 KiB
Go
package dynamic
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import (
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"fmt"
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"github.com/golang/protobuf/proto"
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"github.com/jhump/protoreflect/codec"
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"github.com/jhump/protoreflect/desc"
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)
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// SetExtension sets the given extension value. If the given message is not a
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// dynamic message, the given extension may not be recognized (or may differ
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// from the compiled and linked in version of the extension. So in that case,
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// this function will serialize the given value to bytes and then use
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// proto.SetRawExtension to set the value.
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func SetExtension(msg proto.Message, extd *desc.FieldDescriptor, val interface{}) error {
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if !extd.IsExtension() {
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return fmt.Errorf("given field %s is not an extension", extd.GetFullyQualifiedName())
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}
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if dm, ok := msg.(*Message); ok {
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return dm.TrySetField(extd, val)
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}
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md, err := desc.LoadMessageDescriptorForMessage(msg)
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if err != nil {
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return err
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}
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if err := checkField(extd, md); err != nil {
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return err
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}
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val, err = validFieldValue(extd, val)
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if err != nil {
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return err
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}
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var b codec.Buffer
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b.SetDeterministic(defaultDeterminism)
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if err := b.EncodeFieldValue(extd, val); err != nil {
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return err
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}
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proto.SetRawExtension(msg, extd.GetNumber(), b.Bytes())
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return nil
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}
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