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 } 51 } 52 namespace io { 53 class Printer; // printer.h 54 } 55 } 56 57 namespace protobuf { 58 namespace compiler { 59 namespace java { 60 61 // Generates code for an extension, which may be within the scope of some 62 // message or may be at file scope. This is much simpler than FieldGenerator 63 // since extensions are just simple identifiers with interesting types. 64 class ExtensionGenerator { 65 public: ExtensionGenerator()66 explicit ExtensionGenerator() {} ~ExtensionGenerator()67 virtual ~ExtensionGenerator() {} 68 69 virtual void Generate(io::Printer* printer) = 0; 70 71 // Returns an estimate of the number of bytes the printed code will compile to 72 virtual int GenerateNonNestedInitializationCode(io::Printer* printer) = 0; 73 74 // Returns an estimate of the number of bytes the printed code will compile to 75 virtual int GenerateRegistrationCode(io::Printer* printer) = 0; 76 77 protected: 78 static void InitTemplateVars(const FieldDescriptor* descriptor, 79 const string& scope, 80 bool immutable, 81 ClassNameResolver* name_resolver, 82 map<string, string>* vars_pointer); 83 84 private: 85 GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(ExtensionGenerator); 86 }; 87 88 class ImmutableExtensionGenerator : public ExtensionGenerator { 89 public: 90 explicit ImmutableExtensionGenerator(const FieldDescriptor* descriptor, 91 Context* context); 92 virtual ~ImmutableExtensionGenerator(); 93 94 virtual void Generate(io::Printer* printer); 95 virtual int GenerateNonNestedInitializationCode(io::Printer* printer); 96 virtual int GenerateRegistrationCode(io::Printer* printer); 97 98 protected: 99 const FieldDescriptor* descriptor_; 100 Context* context_; 101 ClassNameResolver* name_resolver_; 102 string scope_; 103 104 private: 105 GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(ImmutableExtensionGenerator); 106 }; 107 108 } // namespace java 109 } // namespace compiler 110 } // namespace protobuf 111 112 } // namespace google 113 #endif // GOOGLE_PROTOBUF_COMPILER_JAVA_EXTENSION_H__ 114