1 // Protocol Buffers - Google's data interchange format
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3 // https://developers.google.com/protocol-buffers/
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30 
31 // Author: kenton@google.com (Kenton Varda)
32 //  Based on original Protocol Buffers design by
33 //  Sanjay Ghemawat, Jeff Dean, and others.
34 //
35 // This header is logically internal, but is made public because it is used
36 // from protocol-compiler-generated code, which may reside in other components.
37 
38 #ifndef GOOGLE_PROTOBUF_REFLECTION_OPS_H__
39 #define GOOGLE_PROTOBUF_REFLECTION_OPS_H__
40 
41 #include <google/protobuf/stubs/common.h>
42 #include <google/protobuf/message.h>
43 
44 namespace google {
45 namespace protobuf {
46 namespace internal {
47 
48 // Basic operations that can be performed using reflection.
49 // These can be used as a cheap way to implement the corresponding
50 // methods of the Message interface, though they are likely to be
51 // slower than implementations tailored for the specific message type.
52 //
53 // This class should stay limited to operations needed to implement
54 // the Message interface.
55 //
56 // This class is really a namespace that contains only static methods.
57 class LIBPROTOBUF_EXPORT ReflectionOps {
58  public:
59   static void Copy(const Message& from, Message* to);
60   static void Merge(const Message& from, Message* to);
61   static void Clear(Message* message);
62   static bool IsInitialized(const Message& message);
63   static void DiscardUnknownFields(Message* message);
64 
65   // Finds all unset required fields in the message and adds their full
66   // paths (e.g. "foo.bar[5].baz") to *names.  "prefix" will be attached to
67   // the front of each name.
68   static void FindInitializationErrors(const Message& message,
69                                        const string& prefix,
70                                        vector<string>* errors);
71 
72  private:
73   // All methods are static.  No need to construct.
74   GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(ReflectionOps);
75 };
76 
77 }  // namespace internal
78 }  // namespace protobuf
79 
80 }  // namespace google
81 #endif  // GOOGLE_PROTOBUF_REFLECTION_OPS_H__
82