record_data.h

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// record_data.h

#pragma once

#include "mongo/bson/bsonobj.h"
#include "mongo/util/shared_buffer.h"

namespace mongo {

// TODO: Does this need to have move support?
class RecordData {
public:
    RecordData() : _data(NULL), _size(0) {}
    RecordData(const char* data, int size) : _data(data), _size(size) {}

    RecordData(SharedBuffer ownedData, int size)
        : _data(ownedData.get()), _size(size), _ownedData(std::move(ownedData)) {}

    const char* data() const {
        return _data;
    }

    int size() const {
        return _size;
    }

    bool isOwned() const {
        return _ownedData.get();
    }

    SharedBuffer releaseBuffer() {
        return std::move(_ownedData);
    }

    BSONObj toBson() const& {
        return isOwned() ? BSONObj(_ownedData) : BSONObj(_data);
    }

    BSONObj releaseToBson() {
        return isOwned() ? BSONObj(releaseBuffer()) : BSONObj(_data);
    }

    BSONObj toBson() && {
        return releaseToBson();
    }

    RecordData getOwned() const {
        if (isOwned())
            return *this;
        auto buffer = SharedBuffer::allocate(_size);
        memcpy(buffer.get(), _data, _size);
        return RecordData(buffer, _size);
    }

    void makeOwned() {
        if (isOwned())
            return;
        *this = getOwned();
    }

private:
    const char* _data;
    int _size;
    SharedBuffer _ownedData;
};

}  // namespace mongo