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1 // Protocol Buffers - Google's data interchange format
2 // Copyright 2008 Google Inc.  All rights reserved.
3 // https://developers.google.com/protocol-buffers/
4 //
5 // Redistribution and use in source and binary forms, with or without
6 // modification, are permitted provided that the following conditions are
7 // met:
8 //
9 //     * Redistributions of source code must retain the above copyright
10 // notice, this list of conditions and the following disclaimer.
11 //     * Redistributions in binary form must reproduce the above
12 // copyright notice, this list of conditions and the following disclaimer
13 // in the documentation and/or other materials provided with the
14 // distribution.
15 //     * Neither the name of Google Inc. nor the names of its
16 // contributors may be used to endorse or promote products derived from
17 // this software without specific prior written permission.
18 //
19 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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