src/google/protobuf/compiler/cpp/cpp_field.cc

// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc.
// http://code.google.com/p/protobuf/
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

// Author: kenton@google.com (Kenton Varda)
//  Based on original Protocol Buffers design by
//  Sanjay Ghemawat, Jeff Dean, and others.

#include <google/protobuf/compiler/cpp/cpp_field.h>
#include <google/protobuf/compiler/cpp/cpp_primitive_field.h>
#include <google/protobuf/compiler/cpp/cpp_string_field.h>
#include <google/protobuf/compiler/cpp/cpp_enum_field.h>
#include <google/protobuf/compiler/cpp/cpp_message_field.h>
#include <google/protobuf/descriptor.pb.h>
#include <google/protobuf/stubs/common.h>

namespace google {
namespace protobuf {
namespace compiler {
namespace cpp {

FieldGenerator::~FieldGenerator() {}

FieldGeneratorMap::FieldGeneratorMap(const Descriptor* descriptor)
  : descriptor_(descriptor),
    field_generators_(
      new scoped_ptr<FieldGenerator>[descriptor->field_count()]) {
  // Construct all the FieldGenerators.
  for (int i = 0; i < descriptor->field_count(); i++) {
    field_generators_[i].reset(MakeGenerator(descriptor->field(i)));
  }
}

FieldGenerator* FieldGeneratorMap::MakeGenerator(const FieldDescriptor* field) {
  if (field->is_repeated()) {
    switch (field->cpp_type()) {
      case FieldDescriptor::CPPTYPE_MESSAGE:
        return new RepeatedMessageFieldGenerator(field);
      case FieldDescriptor::CPPTYPE_STRING:
          return new RepeatedStringFieldGenerator(field);
      case FieldDescriptor::CPPTYPE_ENUM:
        return new RepeatedEnumFieldGenerator(field);
      default:
        return new RepeatedPrimitiveFieldGenerator(field);
    }
  } else {
    switch (field->cpp_type()) {
      case FieldDescriptor::CPPTYPE_MESSAGE:
        return new MessageFieldGenerator(field);
      case FieldDescriptor::CPPTYPE_STRING:
          return new StringFieldGenerator(field);
      case FieldDescriptor::CPPTYPE_ENUM:
        return new EnumFieldGenerator(field);
      default:
        return new PrimitiveFieldGenerator(field);
    }
  }
}

FieldGeneratorMap::~FieldGeneratorMap() {}

const FieldGenerator& FieldGeneratorMap::get(
    const FieldDescriptor* field) const {
  GOOGLE_CHECK_EQ(field->containing_type(), descriptor_);
  return *field_generators_[field->index()];
}

}  // namespace cpp
}  // namespace compiler
}  // namespace protobuf
}  // namespace google