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// Copyright 2019 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package proto
import (
"google.golang.org/protobuf/internal/errors"
"google.golang.org/protobuf/reflect/protoreflect"
"google.golang.org/protobuf/runtime/protoiface"
)
// CheckInitialized returns an error if any required fields in m are not set.
func CheckInitialized(m Message) error {
// Treat a nil message interface as an "untyped" empty message,
// which we assume to have no required fields.
if m == nil {
return nil
}
return checkInitialized(m.ProtoReflect())
}
// CheckInitialized returns an error if any required fields in m are not set.
func checkInitialized(m protoreflect.Message) error {
if methods := protoMethods(m); methods != nil && methods.CheckInitialized != nil {
_, err := methods.CheckInitialized(protoiface.CheckInitializedInput{
Message: m,
})
return err
}
return checkInitializedSlow(m)
}
func checkInitializedSlow(m protoreflect.Message) error {
md := m.Descriptor()
fds := md.Fields()
for i, nums := 0, md.RequiredNumbers(); i < nums.Len(); i++ {
fd := fds.ByNumber(nums.Get(i))
if !m.Has(fd) {
return errors.RequiredNotSet(string(fd.FullName()))
}
}
var err error
m.Range(func(fd protoreflect.FieldDescriptor, v protoreflect.Value) bool {
switch {
case fd.IsList():
if fd.Message() == nil {
return true
}
for i, list := 0, v.List(); i < list.Len() && err == nil; i++ {
err = checkInitialized(list.Get(i).Message())
}
case fd.IsMap():
if fd.MapValue().Message() == nil {
return true
}
v.Map().Range(func(key protoreflect.MapKey, v protoreflect.Value) bool {
err = checkInitialized(v.Message())
return err == nil
})
default:
if fd.Message() == nil {
return true
}
err = checkInitialized(v.Message())
}
return err == nil
})
return err
}
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