1 // Protocol Buffers - Google's data interchange format
2 // Copyright 2008 Google Inc. All rights reserved.
3 // http://code.google.com/p/protobuf/
5 // Redistribution and use in source and binary forms, with or without
6 // modification, are permitted provided that the following conditions are
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
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.
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.
31 // Author: robinson@google.com (Will Robinson)
33 // Generates Python code for a given .proto file.
35 #ifndef GOOGLE_PROTOBUF_COMPILER_PYTHON_GENERATOR_H__
36 #define GOOGLE_PROTOBUF_COMPILER_PYTHON_GENERATOR_H__
40 #include <google/protobuf/compiler/code_generator.h>
41 #include <google/protobuf/stubs/common.h>
48 class EnumValueDescriptor;
49 class FieldDescriptor;
50 class ServiceDescriptor;
52 namespace io { class Printer; }
57 // CodeGenerator implementation for generated Python protocol buffer classes.
58 // If you create your own protocol compiler binary and you want it to support
59 // Python output, you can do so by registering an instance of this
60 // CodeGenerator with the CommandLineInterface in your main() function.
61 class LIBPROTOC_EXPORT Generator : public CodeGenerator {
66 // CodeGenerator methods.
67 virtual bool Generate(const FileDescriptor* file,
68 const string& parameter,
69 GeneratorContext* generator_context,
73 void PrintImports() const;
74 void PrintFileDescriptor() const;
75 void PrintTopLevelEnums() const;
76 void PrintAllNestedEnumsInFile() const;
77 void PrintNestedEnums(const Descriptor& descriptor) const;
78 void PrintEnum(const EnumDescriptor& enum_descriptor) const;
80 void PrintTopLevelExtensions() const;
82 void PrintFieldDescriptor(
83 const FieldDescriptor& field, bool is_extension) const;
84 void PrintFieldDescriptorsInDescriptor(
85 const Descriptor& message_descriptor,
87 const string& list_variable_name,
88 int (Descriptor::*CountFn)() const,
89 const FieldDescriptor* (Descriptor::*GetterFn)(int) const) const;
90 void PrintFieldsInDescriptor(const Descriptor& message_descriptor) const;
91 void PrintExtensionsInDescriptor(const Descriptor& message_descriptor) const;
92 void PrintMessageDescriptors() const;
93 void PrintDescriptor(const Descriptor& message_descriptor) const;
94 void PrintNestedDescriptors(const Descriptor& containing_descriptor) const;
96 void PrintMessages() const;
97 void PrintMessage(const Descriptor& message_descriptor) const;
98 void PrintNestedMessages(const Descriptor& containing_descriptor) const;
100 void FixForeignFieldsInDescriptors() const;
101 void FixForeignFieldsInDescriptor(
102 const Descriptor& descriptor,
103 const Descriptor* containing_descriptor) const;
104 void FixForeignFieldsInField(const Descriptor* containing_type,
105 const FieldDescriptor& field,
106 const string& python_dict_name) const;
107 void AddMessageToFileDescriptor(const Descriptor& descriptor) const;
108 string FieldReferencingExpression(const Descriptor* containing_type,
109 const FieldDescriptor& field,
110 const string& python_dict_name) const;
111 template <typename DescriptorT>
112 void FixContainingTypeInDescriptor(
113 const DescriptorT& descriptor,
114 const Descriptor* containing_descriptor) const;
116 void FixForeignFieldsInExtensions() const;
117 void FixForeignFieldsInExtension(
118 const FieldDescriptor& extension_field) const;
119 void FixForeignFieldsInNestedExtensions(const Descriptor& descriptor) const;
121 void PrintServices() const;
122 void PrintServiceDescriptor(const ServiceDescriptor& descriptor) const;
123 void PrintServiceClass(const ServiceDescriptor& descriptor) const;
124 void PrintServiceStub(const ServiceDescriptor& descriptor) const;
126 void PrintEnumValueDescriptor(const EnumValueDescriptor& descriptor) const;
127 string OptionsValue(const string& class_name,
128 const string& serialized_options) const;
129 bool GeneratingDescriptorProto() const;
131 template <typename DescriptorT>
132 string ModuleLevelDescriptorName(const DescriptorT& descriptor) const;
133 string ModuleLevelMessageName(const Descriptor& descriptor) const;
134 string ModuleLevelServiceDescriptorName(
135 const ServiceDescriptor& descriptor) const;
137 template <typename DescriptorT, typename DescriptorProtoT>
138 void PrintSerializedPbInterval(
139 const DescriptorT& descriptor, DescriptorProtoT& proto) const;
141 void FixAllDescriptorOptions() const;
142 void FixOptionsForField(const FieldDescriptor& field) const;
143 void FixOptionsForEnum(const EnumDescriptor& descriptor) const;
144 void FixOptionsForMessage(const Descriptor& descriptor) const;
146 // Very coarse-grained lock to ensure that Generate() is reentrant.
147 // Guards file_, printer_ and file_descriptor_serialized_.
148 mutable Mutex mutex_;
149 mutable const FileDescriptor* file_; // Set in Generate(). Under mutex_.
150 mutable string file_descriptor_serialized_;
151 mutable io::Printer* printer_; // Set in Generate(). Under mutex_.
153 GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(Generator);
156 } // namespace python
157 } // namespace compiler
158 } // namespace protobuf
160 } // namespace google
161 #endif // GOOGLE_PROTOBUF_COMPILER_PYTHON_GENERATOR_H__