serialization_unique_ptr_container.h

/* Copyright © 2001-2014, Hove and/or its affiliates. All rights reserved.

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*/
#pragma once
#include "serialization_unique_ptr.h"

#include <boost/serialization/serialization.hpp>
#include <boost/serialization/version.hpp>
#include <boost/serialization/split_member.hpp>
#include <boost/serialization/wrapper.hpp>

#include <memory>
#include <map>

/**
 * Serialization specialization for std::vector<std::unique_ptr> because unique_ptr are not copiable
 */
namespace boost {
namespace serialization {

template <class Archive, class Allocator, class T>
inline void save(Archive& ar,
                 const std::vector<std::unique_ptr<T>, Allocator>& t,
                 const unsigned int /* file_version */) {
    // record number of elements
    collection_size_type count(t.size());
    ar << BOOST_SERIALIZATION_NVP(count);

    for (const auto& elt : t)
        ar << boost::serialization::make_nvp("item", elt);
}

template <class Archive, class Allocator, class T>
inline void load(Archive& ar, std::vector<std::unique_ptr<T>, Allocator>& t, const unsigned int /* file_version */) {
    // retrieve number of elements
    collection_size_type count;
    ar >> BOOST_SERIALIZATION_NVP(count);
    t.clear();
    while (count-- > 0) {
        std::unique_ptr<T> i;
        ar >> boost::serialization::make_nvp("item", i);
        t.push_back(std::move(i));  // move object
    }
}

template <class Archive, class k, class V, class Comp, class MapAlloc>
inline void save(Archive& ar,
                 const std::map<k, std::unique_ptr<V>, Comp, MapAlloc>& t,
                 const unsigned int /* file_version */) {
    // record number of elements
    collection_size_type count(t.size());
    ar << BOOST_SERIALIZATION_NVP(count);

    for (const auto& p : t) {
        ar << boost::serialization::make_nvp("key", p.first);
        ar << boost::serialization::make_nvp("value", p.second);
    }
}

template <class Archive, class K, class V, class Comp, class MapAlloc>
inline void load(Archive& ar,
                 std::map<K, std::unique_ptr<V>, Comp, MapAlloc>& map,
                 const unsigned int /* file_version */) {
    // retrieve number of elements
    collection_size_type count;
    ar >> BOOST_SERIALIZATION_NVP(count);
    map.clear();
    while (count-- > 0) {
        K k;
        ar >> boost::serialization::make_nvp("key", k);
        std::unique_ptr<V> v;
        ar >> boost::serialization::make_nvp("value", v);
        map[k] = std::move(v);  // move object
    }
}

template <class Archive, class Allocator, class T>
inline void serialize(Archive& ar, std::vector<std::unique_ptr<T>, Allocator>& t, const unsigned int file_version) {
    boost::serialization::split_free(ar, t, file_version);
}

template <class Archive, class K, class V, class Comp, class Allocator>
inline void serialize(Archive& ar,
                      std::map<K, std::unique_ptr<V>, Comp, Allocator>& m,
                      const unsigned int file_version) {
    boost::serialization::split_free(ar, m, file_version);
}
}  // namespace serialization
}  // namespace boost