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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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   virtual void GenerateNonNestedInitializationCode(io::Printer* printer) = 0;
71   virtual void GenerateRegistrationCode(io::Printer* printer) = 0;
72 
73  protected:
74   static void InitTemplateVars(const FieldDescriptor* descriptor,
75                                const string& scope,
76                                bool immutable,
77                                ClassNameResolver* name_resolver,
78                                map<string, string>* vars_pointer);
79 
80  private:
81   GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(ExtensionGenerator);
82 };
83 
84 class ImmutableExtensionGenerator : public ExtensionGenerator {
85  public:
86   explicit ImmutableExtensionGenerator(const FieldDescriptor* descriptor,
87                                        Context* context);
88   virtual ~ImmutableExtensionGenerator();
89 
90   virtual void Generate(io::Printer* printer);
91   virtual void GenerateNonNestedInitializationCode(io::Printer* printer);
92   virtual void GenerateRegistrationCode(io::Printer* printer);
93 
94  protected:
95   const FieldDescriptor* descriptor_;
96   Context* context_;
97   ClassNameResolver* name_resolver_;
98   string scope_;
99 
100  private:
101   GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(ImmutableExtensionGenerator);
102 };
103 
104 }  // namespace java
105 }  // namespace compiler
106 }  // namespace protobuf
107 
108 }  // namespace google
109 #endif  // GOOGLE_PROTOBUF_COMPILER_JAVA_EXTENSION_H__
110