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// Author: robinson@google.com (Will Robinson) 32// 33// Generates Python code for a given .proto file. 34 35#ifndef GOOGLE_PROTOBUF_COMPILER_PYTHON_GENERATOR_H__ 36#define GOOGLE_PROTOBUF_COMPILER_PYTHON_GENERATOR_H__ 37 38#include <string> 39 40#include <google/protobuf/compiler/code_generator.h> 41#include <google/protobuf/stubs/common.h> 42 43namespace google { 44namespace protobuf { 45 46class Descriptor; 47class EnumDescriptor; 48class EnumValueDescriptor; 49class FieldDescriptor; 50class ServiceDescriptor; 51 52namespace io { class Printer; } 53 54namespace compiler { 55namespace python { 56 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. 61class LIBPROTOC_EXPORT Generator : public CodeGenerator { 62 public: 63 Generator(); 64 virtual ~Generator(); 65 66 // CodeGenerator methods. 67 virtual bool Generate(const FileDescriptor* file, 68 const string& parameter, 69 GeneratorContext* generator_context, 70 string* error) const; 71 72 private: 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; 79 80 void PrintTopLevelExtensions() const; 81 82 void PrintFieldDescriptor( 83 const FieldDescriptor& field, bool is_extension) const; 84 void PrintFieldDescriptorsInDescriptor( 85 const Descriptor& message_descriptor, 86 bool is_extension, 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; 95 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; 102 103 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; 120 121 void FixForeignFieldsInExtensions() const; 122 void FixForeignFieldsInExtension( 123 const FieldDescriptor& extension_field) const; 124 void FixForeignFieldsInNestedExtensions(const Descriptor& descriptor) const; 125 126 void PrintServices() const; 127 void PrintServiceDescriptor(const ServiceDescriptor& descriptor) const; 128 void PrintServiceClass(const ServiceDescriptor& descriptor) const; 129 void PrintServiceStub(const ServiceDescriptor& descriptor) const; 130 131 void PrintEnumValueDescriptor(const EnumValueDescriptor& descriptor) const; 132 string OptionsValue(const string& class_name, 133 const string& serialized_options) const; 134 bool GeneratingDescriptorProto() const; 135 136 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; 141 142 template <typename DescriptorT, typename DescriptorProtoT> 143 void PrintSerializedPbInterval( 144 const DescriptorT& descriptor, DescriptorProtoT& proto) const; 145 146 void FixAllDescriptorOptions() const; 147 void FixOptionsForField(const FieldDescriptor& field) const; 148 void FixOptionsForEnum(const EnumDescriptor& descriptor) const; 149 void FixOptionsForMessage(const Descriptor& descriptor) const; 150 151 // 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_. 157 158 GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(Generator); 159}; 160 161} // namespace python 162} // namespace compiler 163} // namespace protobuf 164 165} // namespace google 166#endif // GOOGLE_PROTOBUF_COMPILER_PYTHON_GENERATOR_H__ 167