Method LookupMsg

internal/descriptor/registry.go:352–376

LookupMsg looks up a message type by "name". It tries to resolve "name" from "location" if "name" is a relative message name.

(location, name string)

// LookupMsg looks up a message type by "name".
// It tries to resolve "name" from "location" if "name" is a relative message name.
func (r *Registry) LookupMsg(location, name string) (*Message, error) {
	if grpclog.V(1) {
		grpclog.Infof("Lookup %s from %s", name, location)
	}
	if strings.HasPrefix(name, ".") {
		m, ok := r.msgs[name]
		if !ok {
			return nil, fmt.Errorf("no message found: %s", name)
		}
		return m, nil
	}

	if !strings.HasPrefix(location, ".") {
		location = fmt.Sprintf(".%s", location)
	}
	components := strings.Split(location, ".")
	for len(components) > 0 {
		fqmn := strings.Join(append(components, name), ".")
		if m, ok := r.msgs[fqmn]; ok {
			return m, nil
		}
		components = components[:len(components)-1]
	}
	return nil, fmt.Errorf("no message found: %s", name)
}

// LookupEnum looks up an enum type by "name".
// It tries to resolve "name" from "location" if "name" is a relative enum name.