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      1 // Protocol Buffers - Google's data interchange format
      2 // Copyright 2008 Google Inc.  All rights reserved.
      3 // http://code.google.com/p/protobuf/
      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 (at) 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 #include <google/protobuf/descriptor.h>
     41 
     42 namespace google {
     43 namespace protobuf {
     44   namespace io {
     45     class Printer;             // printer.h
     46   }
     47 }
     48 
     49 namespace protobuf {
     50 namespace compiler {
     51 namespace java {
     52 
     53 class EnumGenerator {
     54  public:
     55   explicit EnumGenerator(const EnumDescriptor* descriptor);
     56   ~EnumGenerator();
     57 
     58   void Generate(io::Printer* printer);
     59 
     60  private:
     61   const EnumDescriptor* descriptor_;
     62 
     63   // The proto language allows multiple enum constants to have the same numeric
     64   // value.  Java, however, does not allow multiple enum constants to be
     65   // considered equivalent.  We treat the first defined constant for any
     66   // given numeric value as "canonical" and the rest as aliases of that
     67   // canonical value.
     68   vector<const EnumValueDescriptor*> canonical_values_;
     69 
     70   struct Alias {
     71     const EnumValueDescriptor* value;
     72     const EnumValueDescriptor* canonical_value;
     73   };
     74   vector<Alias> aliases_;
     75 
     76   GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(EnumGenerator);
     77 };
     78 
     79 }  // namespace java
     80 }  // namespace compiler
     81 }  // namespace protobuf
     82 
     83 }  // namespace google
     84 #endif  // GOOGLE_PROTOBUF_COMPILER_JAVA_ENUM_H__
     85