proto_field_ops.h

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/* * NRP Core - Backend infrastructure to synchronize simulations
 *
 * Copyright 2020-2023 NRP Team
 *
 * 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.
 *
 * This project has received funding from the European Union’s Horizon 2020
 * Framework Programme for Research and Innovation under the Specific Grant
 * Agreement No. 945539 (Human Brain Project SGA3).
 */
 
#ifndef PROTO_FIELD_OPS_H
#define PROTO_FIELD_OPS_H
 
#include "google/protobuf/message.h"
#include <boost/python.hpp>
#include "nrp_general_library/utils/nrp_exceptions.h"
 
namespace bpy = boost::python;
namespace gpb = google::protobuf;
 
 
namespace proto_field_ops {
 
    bpy::object GetScalarField(gpb::Message &m, const gpb::FieldDescriptor *field);
 
    std::string GetScalarFieldAsString(const gpb::Message &m, const gpb::FieldDescriptor *field);
 
    bpy::object GetRepeatedScalarField(gpb::Message &m, const gpb::FieldDescriptor *field, int index);
 
    template<class MSG, class ...REMAINING_MSGS>
    bpy::object GetMessageField(gpb::Message &m, const gpb::FieldDescriptor *field) {
        static_assert(std::is_base_of_v<google::protobuf::Message, MSG>,"Parameter MSG must derive from protobuf::Message");
        static_assert((std::is_base_of_v<google::protobuf::Message, REMAINING_MSGS> && ...), "Parameter REMAINING_MSGS must derive from protobuf::Message");
 
        MSG *msg_field = dynamic_cast<MSG *>(m.GetReflection()->MutableMessage(&m, field));
        if(msg_field != nullptr) {
            typename bpy::reference_existing_object::apply<MSG *>::type convert;
            return bpy::object(bpy::handle<>(convert(msg_field)));
        }
 
        if constexpr (sizeof...(REMAINING_MSGS) > 0)
            return GetMessageField<REMAINING_MSGS...>(m, field);
        else
            throw NRPException::logCreate("Unable to get composite field with name " + field->name());
    }
 
    void SetScalarField(gpb::Message &m, const gpb::FieldDescriptor *field, const bpy::object &value);
 
    void SetRepeatedScalarField(gpb::Message &m, const gpb::FieldDescriptor *field, const bpy::object &value, int index);
 
    void AddRepeatedScalarField(gpb::Message &m, const gpb::FieldDescriptor *field, const bpy::object &value);
 
}
 
#endif // PROTO_FIELD_OPS_H