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#ifndef GOOGLE_PROTOBUF_ANY_H__
32#define GOOGLE_PROTOBUF_ANY_H__
33
34#include <string>
35
36#include <google/protobuf/stubs/common.h>
37#include <google/protobuf/arenastring.h>
38#include <google/protobuf/message_lite.h>
39
40#include <google/protobuf/port_def.inc>
41
42namespace google {
43namespace protobuf {
44
45class FieldDescriptor;
46class Message;
47
48namespace internal {
49
50extern const char kAnyFullTypeName[]; // "google.protobuf.Any".
51extern const char kTypeGoogleApisComPrefix[]; // "type.googleapis.com/".
52extern const char kTypeGoogleProdComPrefix[]; // "type.googleprod.com/".
53
54std::string GetTypeUrl(StringPiece message_name,
55 StringPiece type_url_prefix);
56
57// Helper class used to implement google::protobuf::Any.
58class PROTOBUF_EXPORT AnyMetadata {
59 typedef ArenaStringPtr UrlType;
60 typedef ArenaStringPtr ValueType;
61 public:
62 // AnyMetadata does not take ownership of "type_url" and "value".
63 AnyMetadata(UrlType* type_url, ValueType* value);
64
65 // Packs a message using the default type URL prefix: "type.googleapis.com".
66 // The resulted type URL will be "type.googleapis.com/<message_full_name>".
67 template <typename T>
68 void PackFrom(const T& message) {
69 InternalPackFrom(message, type_url_prefix: kTypeGoogleApisComPrefix, type_name: T::FullMessageName());
70 }
71
72 void PackFrom(const Message& message);
73
74 // Packs a message using the given type URL prefix. The type URL will be
75 // constructed by concatenating the message type's full name to the prefix
76 // with an optional "/" separator if the prefix doesn't already end with "/".
77 // For example, both PackFrom(message, "type.googleapis.com") and
78 // PackFrom(message, "type.googleapis.com/") yield the same result type
79 // URL: "type.googleapis.com/<message_full_name>".
80 template <typename T>
81 void PackFrom(const T& message, StringPiece type_url_prefix) {
82 InternalPackFrom(message, type_url_prefix, type_name: T::FullMessageName());
83 }
84
85 void PackFrom(const Message& message, const std::string& type_url_prefix);
86
87 // Unpacks the payload into the given message. Returns false if the message's
88 // type doesn't match the type specified in the type URL (i.e., the full
89 // name after the last "/" of the type URL doesn't match the message's actual
90 // full name) or parsing the payload has failed.
91 template <typename T>
92 bool UnpackTo(T* message) const {
93 return InternalUnpackTo(type_name: T::FullMessageName(), message);
94 }
95
96 bool UnpackTo(Message* message) const;
97
98 // Checks whether the type specified in the type URL matches the given type.
99 // A type is considered matching if its full name matches the full name after
100 // the last "/" in the type URL.
101 template <typename T>
102 bool Is() const {
103 return InternalIs(type_name: T::FullMessageName());
104 }
105
106 private:
107 void InternalPackFrom(const MessageLite& message,
108 StringPiece type_url_prefix,
109 StringPiece type_name);
110 bool InternalUnpackTo(StringPiece type_name,
111 MessageLite* message) const;
112 bool InternalIs(StringPiece type_name) const;
113
114 UrlType* type_url_;
115 ValueType* value_;
116
117 GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(AnyMetadata);
118};
119
120// Get the proto type name from Any::type_url value. For example, passing
121// "type.googleapis.com/rpc.QueryOrigin" will return "rpc.QueryOrigin" in
122// *full_type_name. Returns false if the type_url does not have a "/"
123// in the type url separating the full type name.
124//
125// NOTE: this function is available publicly as:
126// google::protobuf::Any() // static method on the generated message type.
127bool ParseAnyTypeUrl(const std::string& type_url, std::string* full_type_name);
128
129// Get the proto type name and prefix from Any::type_url value. For example,
130// passing "type.googleapis.com/rpc.QueryOrigin" will return
131// "type.googleapis.com/" in *url_prefix and "rpc.QueryOrigin" in
132// *full_type_name. Returns false if the type_url does not have a "/" in the
133// type url separating the full type name.
134bool ParseAnyTypeUrl(const std::string& type_url, std::string* url_prefix,
135 std::string* full_type_name);
136
137// See if message is of type google.protobuf.Any, if so, return the descriptors
138// for "type_url" and "value" fields.
139bool GetAnyFieldDescriptors(const Message& message,
140 const FieldDescriptor** type_url_field,
141 const FieldDescriptor** value_field);
142
143} // namespace internal
144} // namespace protobuf
145} // namespace google
146
147#include <google/protobuf/port_undef.inc>
148
149#endif // GOOGLE_PROTOBUF_ANY_H__
150

source code of include/google/protobuf/any.h