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: kenton@google.com (Kenton Varda) 32 // Based on original Protocol Buffers design by 33 // Sanjay Ghemawat, Jeff Dean, and others. 34 35 #ifndef GOOGLE_PROTOBUF_COMPILER_JAVA_EXTENSION_H__ 36 #define GOOGLE_PROTOBUF_COMPILER_JAVA_EXTENSION_H__ 37 38 #include <map> 39 #include <string> 40 41 #include <google/protobuf/stubs/common.h> 42 43 namespace google { 44 namespace protobuf { 45 class FieldDescriptor; // descriptor.h 46 namespace compiler { 47 namespace java { 48 class Context; // context.h 49 class ClassNameResolver; // name_resolver.h 50 } // namespace java 51 } // namespace compiler 52 namespace io { 53 class Printer; // printer.h 54 } 55 } // namespace protobuf 56 } // namespace google 57 58 namespace google { 59 namespace protobuf { 60 namespace compiler { 61 namespace java { 62 63 // Generates code for an extension, which may be within the scope of some 64 // message or may be at file scope. This is much simpler than FieldGenerator 65 // since extensions are just simple identifiers with interesting types. 66 class ExtensionGenerator { 67 public: ExtensionGenerator()68 explicit ExtensionGenerator() {} ~ExtensionGenerator()69 virtual ~ExtensionGenerator() {} 70 71 virtual void Generate(io::Printer* printer) = 0; 72 73 // Returns an estimate of the number of bytes the printed code will compile 74 // to 75 virtual int GenerateNonNestedInitializationCode(io::Printer* printer) = 0; 76 77 // Returns an estimate of the number of bytes the printed code will compile 78 // to 79 virtual int GenerateRegistrationCode(io::Printer* printer) = 0; 80 81 protected: 82 static void InitTemplateVars( 83 const FieldDescriptor* descriptor, const std::string& scope, 84 bool immutable, ClassNameResolver* name_resolver, 85 std::map<std::string, std::string>* vars_pointer); 86 87 private: 88 GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(ExtensionGenerator); 89 }; 90 91 class ImmutableExtensionGenerator : public ExtensionGenerator { 92 public: 93 explicit ImmutableExtensionGenerator(const FieldDescriptor* descriptor, 94 Context* context); 95 ~ImmutableExtensionGenerator() override; 96 97 void Generate(io::Printer* printer) override; 98 int GenerateNonNestedInitializationCode(io::Printer* printer) override; 99 int GenerateRegistrationCode(io::Printer* printer) override; 100 101 protected: 102 const FieldDescriptor* descriptor_; 103 ClassNameResolver* name_resolver_; 104 std::string scope_; 105 106 private: 107 GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(ImmutableExtensionGenerator); 108 }; 109 110 } // namespace java 111 } // namespace compiler 112 } // namespace protobuf 113 } // namespace google 114 115 #endif // GOOGLE_PROTOBUF_COMPILER_JAVA_EXTENSION_H__ 116