1 // Protocol Buffers - Google's data interchange format
2 // Copyright 2008 Google Inc. All rights reserved.
3 // https://developers.google.com/protocol-buffers/
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17 // this software without specific prior written permission.
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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 string& prefix,
98 vector<string>* to_register) const;
99 void PrintNestedMessages(const Descriptor& containing_descriptor,
100 const string& prefix,
101 vector<string>* to_register) const;
103 void FixForeignFieldsInDescriptors() const;
104 void FixForeignFieldsInDescriptor(
105 const Descriptor& descriptor,
106 const Descriptor* containing_descriptor) const;
107 void FixForeignFieldsInField(const Descriptor* containing_type,
108 const FieldDescriptor& field,
109 const string& python_dict_name) const;
110 void AddMessageToFileDescriptor(const Descriptor& descriptor) const;
111 void AddEnumToFileDescriptor(const EnumDescriptor& descriptor) const;
112 void AddExtensionToFileDescriptor(const FieldDescriptor& descriptor) const;
113 string FieldReferencingExpression(const Descriptor* containing_type,
114 const FieldDescriptor& field,
115 const string& python_dict_name) const;
116 template <typename DescriptorT>
117 void FixContainingTypeInDescriptor(
118 const DescriptorT& descriptor,
119 const Descriptor* containing_descriptor) const;
121 void FixForeignFieldsInExtensions() const;
122 void FixForeignFieldsInExtension(
123 const FieldDescriptor& extension_field) const;
124 void FixForeignFieldsInNestedExtensions(const Descriptor& descriptor) const;
126 void PrintServices() const;
127 void PrintServiceDescriptor(const ServiceDescriptor& descriptor) const;
128 void PrintServiceClass(const ServiceDescriptor& descriptor) const;
129 void PrintServiceStub(const ServiceDescriptor& descriptor) const;
131 void PrintEnumValueDescriptor(const EnumValueDescriptor& descriptor) const;
132 string OptionsValue(const string& class_name,
133 const string& serialized_options) const;
134 bool GeneratingDescriptorProto() const;
136 template <typename DescriptorT>
137 string ModuleLevelDescriptorName(const DescriptorT& descriptor) const;
138 string ModuleLevelMessageName(const Descriptor& descriptor) const;
139 string ModuleLevelServiceDescriptorName(
140 const ServiceDescriptor& descriptor) const;
142 template <typename DescriptorT, typename DescriptorProtoT>
143 void PrintSerializedPbInterval(
144 const DescriptorT& descriptor, DescriptorProtoT& proto) const;
146 void FixAllDescriptorOptions() const;
147 void FixOptionsForField(const FieldDescriptor& field) const;
148 void FixOptionsForEnum(const EnumDescriptor& descriptor) const;
149 void FixOptionsForMessage(const Descriptor& descriptor) const;
151 // Very coarse-grained lock to ensure that Generate() is reentrant.
152 // Guards file_, printer_ and file_descriptor_serialized_.
153 mutable Mutex mutex_;
154 mutable const FileDescriptor* file_; // Set in Generate(). Under mutex_.
155 mutable string file_descriptor_serialized_;
156 mutable io::Printer* printer_; // Set in Generate(). Under mutex_.
158 GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(Generator);
161 } // namespace python
162 } // namespace compiler
163 } // namespace protobuf
165 } // namespace google
166 #endif // GOOGLE_PROTOBUF_COMPILER_PYTHON_GENERATOR_H__