javanano_enum.h revision 64d8d8f89050c5ada85341f967af391f4716a7cb 
1// Protocol Buffers - Google's data interchange format
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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_ENUM_H__
36#define GOOGLE_PROTOBUF_COMPILER_JAVA_ENUM_H__
37
38#include <string>
39#include <vector>
40
41#include <google/protobuf/compiler/javanano/javanano_params.h>
42#include <google/protobuf/descriptor.h>
43
44namespace google {
45namespace protobuf {
46  namespace io {
47    class Printer;             // printer.h
48  }
49}
50
51namespace protobuf {
52namespace compiler {
53namespace javanano {
54
55class EnumGenerator {
56 public:
57  explicit EnumGenerator(const EnumDescriptor* descriptor, const Params& params);
58  ~EnumGenerator();
59
60  void Generate(io::Printer* printer);
61
62 private:
63  const Params& params_;
64  const EnumDescriptor* descriptor_;
65
66  // The proto language allows multiple enum constants to have the same numeric
67  // value.  Java, however, does not allow multiple enum constants to be
68  // considered equivalent.  We treat the first defined constant for any
69  // given numeric value as "canonical" and the rest as aliases of that
70  // canonical value.
71  vector<const EnumValueDescriptor*> canonical_values_;
72
73  struct Alias {
74    const EnumValueDescriptor* value;
75    const EnumValueDescriptor* canonical_value;
76  };
77  vector<Alias> aliases_;
78
79  GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(EnumGenerator);
80};
81
82}  // namespace javanano
83}  // namespace compiler
84}  // namespace protobuf
85
86}  // namespace google
87#endif  // GOOGLE_PROTOBUF_COMPILER_JAVA_ENUM_H__
88