string_map.h

// Copyright 2018-present Network Optix, Inc. Licensed under MPL 2.0: www.mozilla.org/MPL/2.0/

#pragma once

#include <map>
#include <vector>

#include <nx/sdk/helpers/ref_countable.h>
#include <nx/sdk/i_string_map.h>

namespace nx::sdk {

class StringMap: public RefCountable<IStringMap>
{
public:
    using Map = std::map<std::string, std::string>;

    StringMap() = default;

    StringMap(Map map): m_map(std::move(map)) {}

    void setItem(std::string key, std::string value);

    void clear();

    virtual int count() const override;

    virtual const char* key(int i) const override;

    virtual const char* value(int i) const override;

    virtual const char* value(const char* key) const override;

private:
    void initLookupCache() const;

private:
    Map m_map;

    // Cache for lookup by index to avoid O(N^2).
    mutable std::vector<const char*> m_lookupCache;
};

} // namespace nx::sdk