Program Listing for File metadata.h

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//==================================================================================
// BSD 2-Clause License
//
// Copyright (c) 2014-2022, NJIT, Duality Technologies Inc. and other contributors
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// Author TPOC: contact@openfhe.org
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#ifndef LBCRYPTO_CRYPTO_METADATA_H
#define LBCRYPTO_CRYPTO_METADATA_H

#include "utils/exception.h"

#include <map>
#include <memory>
#include <string>
#include <ostream>

namespace lbcrypto {

class Metadata;
using MetadataMap = std::shared_ptr<std::map<std::string, std::shared_ptr<Metadata>>>;

class Metadata {
public:
    Metadata() {}

    Metadata(const Metadata& mdata) {
        Metadata();
    }

    virtual ~Metadata() {}

    virtual std::shared_ptr<Metadata> Clone() const {
        return std::make_shared<Metadata>();
    }

    virtual bool operator==(const Metadata& mdata) const {
        return true;
    }

    virtual bool operator!=(const Metadata& mdata) const {
        return !(*this == mdata);
    }

    virtual std::ostream& print(std::ostream& out) const {
        out << "[ ]" << std::endl;
        return out;
    }

    friend std::ostream& operator<<(std::ostream& out, const Metadata& m) {
        m.print(out);
        return out;
    }

    template <class Archive>
    void save(Archive& ar, std::uint32_t const version) const {}

    template <class Archive>
    void load(Archive& ar, std::uint32_t const version) {
        if (version > SerializedVersion()) {
            OPENFHE_THROW("serialized object version " + std::to_string(version) +
                          " is from a later version of the library");
        }
    }

    virtual std::string SerializedObjectName() const {
        return "Metadata";
    }

    static uint32_t SerializedVersion() {
        return 1;
    }
};

}  // end namespace lbcrypto

#endif