type_helper.cpp

// Copyright 2011-2023:
//   GobySoft, LLC (2013-)
//   Massachusetts Institute of Technology (2007-2014)
//   Community contributors (see AUTHORS file)
// File authors:
//   Toby Schneider <toby@gobysoft.org>
//   Chris Murphy <cmurphy@aphysci.com>
//
//
// This file is part of the Dynamic Compact Control Language Library
// ("DCCL").
//
// DCCL is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 2.1 of the License, or
// (at your option) any later version.
//
// DCCL is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with DCCL.  If not, see <http://www.gnu.org/licenses/>.
#include "type_helper.h"
 
template <google::protobuf::FieldDescriptor::Type t>
void insertType(dccl::internal::TypeHelper::TypeMap* type_map)
{
    type_map->emplace(t, std::shared_ptr<dccl::internal::FromProtoTypeBase>(
                             new dccl::internal::FromProtoType<t>));
}
 
template <google::protobuf::FieldDescriptor::CppType t>
void insert(dccl::internal::TypeHelper::CppTypeMap* cpptype_map)
{
    cpptype_map->emplace(t, std::shared_ptr<dccl::internal::FromProtoCppTypeBase>(
                                new dccl::internal::FromProtoCppType<t>));
}
 
//
// TypeHelper
//
void dccl::internal::TypeHelper::initialize()
{
    using namespace google::protobuf;
    using std::shared_ptr;
 
    type_map_.emplace(static_cast<FieldDescriptor::Type>(0), std::make_shared<FromProtoTypeBase>());
    insertType<FieldDescriptor::TYPE_DOUBLE>(&type_map_);
    insertType<FieldDescriptor::TYPE_FLOAT>(&type_map_);
    insertType<FieldDescriptor::TYPE_UINT64>(&type_map_);
    insertType<FieldDescriptor::TYPE_UINT32>(&type_map_);
    insertType<FieldDescriptor::TYPE_FIXED64>(&type_map_);
    insertType<FieldDescriptor::TYPE_FIXED32>(&type_map_);
    insertType<FieldDescriptor::TYPE_INT64>(&type_map_);
    insertType<FieldDescriptor::TYPE_INT32>(&type_map_);
    insertType<FieldDescriptor::TYPE_SFIXED32>(&type_map_);
    insertType<FieldDescriptor::TYPE_SFIXED64>(&type_map_);
    insertType<FieldDescriptor::TYPE_SINT32>(&type_map_);
    insertType<FieldDescriptor::TYPE_SINT64>(&type_map_);
    insertType<FieldDescriptor::TYPE_BOOL>(&type_map_);
    insertType<FieldDescriptor::TYPE_STRING>(&type_map_);
    insertType<FieldDescriptor::TYPE_BYTES>(&type_map_);
    insertType<FieldDescriptor::TYPE_MESSAGE>(&type_map_);
    insertType<FieldDescriptor::TYPE_GROUP>(&type_map_);
    insertType<FieldDescriptor::TYPE_ENUM>(&type_map_);
 
    cpptype_map_.emplace(static_cast<FieldDescriptor::CppType>(0),
                         std::make_shared<FromProtoCppTypeBase>());
 
    insert<FieldDescriptor::CPPTYPE_DOUBLE>(&cpptype_map_);
    insert<FieldDescriptor::CPPTYPE_FLOAT>(&cpptype_map_);
    insert<FieldDescriptor::CPPTYPE_UINT64>(&cpptype_map_);
    insert<FieldDescriptor::CPPTYPE_UINT32>(&cpptype_map_);
    insert<FieldDescriptor::CPPTYPE_INT64>(&cpptype_map_);
    insert<FieldDescriptor::CPPTYPE_INT32>(&cpptype_map_);
    insert<FieldDescriptor::CPPTYPE_BOOL>(&cpptype_map_);
    insert<FieldDescriptor::CPPTYPE_STRING>(&cpptype_map_);
    insert<FieldDescriptor::CPPTYPE_MESSAGE>(&cpptype_map_);
    insert<FieldDescriptor::CPPTYPE_ENUM>(&cpptype_map_);
}
 
std::shared_ptr<dccl::internal::FromProtoCppTypeBase>
dccl::internal::TypeHelper::find(google::protobuf::FieldDescriptor::CppType cpptype,
                                 const std::string& type_name /*= ""*/) const
{
    if (!type_name.empty())
    {
        auto it = custom_message_map_.find(type_name);
        if (it != custom_message_map_.end())
            return it->second;
    }
 
    auto it = cpptype_map_.find(cpptype);
    if (it != cpptype_map_.end())
        return it->second;
    else
        return std::shared_ptr<FromProtoCppTypeBase>();
}
 
std::shared_ptr<dccl::internal::FromProtoTypeBase>
dccl::internal::TypeHelper::find(google::protobuf::FieldDescriptor::Type type) const
{
    auto it = type_map_.find(type);
    if (it != type_map_.end())
        return it->second;
    else
        return std::shared_ptr<FromProtoTypeBase>();
}