dynamic_message.h | Explore in Territory

// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc.  All rights reserved.
// https://developers.google.com/protocol-buffers/
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// Author: [email protected] (Kenton Varda)
//  Based on original Protocol Buffers design by
//  Sanjay Ghemawat, Jeff Dean, and others.
//
// Defines an implementation of Message which can emulate types which are not
// known at compile-time.

#ifndef GOOGLE_PROTOBUF_DYNAMIC_MESSAGE_H__
#define GOOGLE_PROTOBUF_DYNAMIC_MESSAGE_H__


#include <algorithm>
#include <memory>
#include <unordered_map>
#include <vector>

#include <google/protobuf/stubs/common.h>
#include <google/protobuf/stubs/mutex.h>
#include <google/protobuf/message.h>
#include <google/protobuf/reflection.h>
#include <google/protobuf/repeated_field.h>

#ifdef SWIG
#error "You cannot SWIG proto headers"
#endif

// Must be included last.
#include <google/protobuf/port_def.inc>

namespace google {
namespace protobuf {

// Defined in other files.
class Descriptor;      // descriptor.h
class DescriptorPool;  // descriptor.h

// Constructs implementations of Message which can emulate types which are not
// known at compile-time.
//
// Sometimes you want to be able to manipulate protocol types that you don't
// know about at compile time.  It would be nice to be able to construct
// a Message object which implements the message type given by any arbitrary
// Descriptor.  DynamicMessage provides this.
//
// As it turns out, a DynamicMessage needs to construct extra
// information about its type in order to operate.  Most of this information
// can be shared between all DynamicMessages of the same type.  But, caching
// this information in some sort of global map would be a bad idea, since
// the cached information for a particular descriptor could outlive the
// descriptor itself.  To avoid this problem, DynamicMessageFactory
// encapsulates this "cache".  All DynamicMessages of the same type created
// from the same factory will share the same support data.  Any Descriptors
// used with a particular factory must outlive the factory.
class PROTOBUF_EXPORT DynamicMessageFactory : public MessageFactory { … };

// Helper for computing a sorted list of map entries via reflection.
class PROTOBUF_EXPORT DynamicMapSorter { … };

}  // namespace protobuf
}  // namespace google

#include <google/protobuf/port_undef.inc>

#endif  // GOOGLE_PROTOBUF_DYNAMIC_MESSAGE_H__
chromium/third_party/protobuf/src/google/protobuf/dynamic_message.h
