1// Protocol Buffers - Google's data interchange format 2// Copyright 2008 Google Inc. All rights reserved. 3// http://code.google.com/p/protobuf/ 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/message.h> 42 43namespace google { 44namespace protobuf { 45namespace internal { 46 47// Basic operations that can be performed using reflection. 48// These can be used as a cheap way to implement the corresponding 49// methods of the Message interface, though they are likely to be 50// slower than implementations tailored for the specific message type. 51// 52// This class should stay limited to operations needed to implement 53// the Message interface. 54// 55// This class is really a namespace that contains only static methods. 56class LIBPROTOBUF_EXPORT ReflectionOps { 57 public: 58 static void Copy(const Message& from, Message* to); 59 static void Merge(const Message& from, Message* to); 60 static void Clear(Message* message); 61 static bool IsInitialized(const Message& message); 62 static void DiscardUnknownFields(Message* message); 63 64 // Finds all unset required fields in the message and adds their full 65 // paths (e.g. "foo.bar[5].baz") to *names. "prefix" will be attached to 66 // the front of each name. 67 static void FindInitializationErrors(const Message& message, 68 const string& prefix, 69 vector<string>* errors); 70 71 private: 72 // All methods are static. No need to construct. 73 GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(ReflectionOps); 74}; 75 76} // namespace internal 77} // namespace protobuf 78 79} // namespace google 80#endif // GOOGLE_PROTOBUF_REFLECTION_OPS_H__ 81