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 43namespace google { 44namespace 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 57namespace protobuf { 58namespace compiler { 59namespace 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. 64class ExtensionGenerator { 65 public: 66 explicit 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 88class 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