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#pragma once
#include "coding/file_reader.hpp"
#include "coding/read_write_utils.hpp"
#include "base/assert.hpp"
#include "base/geo_object_id.hpp"
#include "base/logging.hpp"
#include <algorithm>
#include <utility>
#include <vector>
namespace gen
{
template <class T> class Accumulator
{
protected:
std::vector<T> m_data;
public:
typedef T ValueT;
void Add(T const & t) { m_data.push_back(t); }
template <class TSink> void Flush(TSink & sink) const
{
rw::WriteVectorOfPOD(sink, m_data);
}
template <class TSource> void Read(TSource & src)
{
rw::ReadVectorOfPOD(src, m_data);
}
};
class OsmID2FeatureID : public Accumulator<std::pair<base::GeoObjectId, uint32_t /* feature id */>>
{
typedef Accumulator<ValueT> BaseT;
struct LessID
{
bool operator() (ValueT const & r1, ValueT const & r2) const { return r1.first < r2.first; }
bool operator()(base::GeoObjectId const & r1, ValueT const & r2) const { return r1 < r2.first; }
bool operator()(ValueT const & r1, base::GeoObjectId const & r2) const { return r1.first < r2; }
};
public:
template <class TSink> void Flush(TSink & sink)
{
std::sort(m_data.begin(), m_data.end());
BaseT::Flush(sink);
}
/// Find a feature id for an OSM id.
bool GetFeatureID(base::GeoObjectId const & id, uint32_t & result) const
{
auto const it = std::lower_bound(m_data.begin(), m_data.end(), id, LessID());
if (it == m_data.end() || it->first != id)
return false;
result = it->second;
return true;
}
template <class Fn>
void ForEach(Fn && fn) const
{
for (auto const & v : m_data)
fn(v);
}
bool ReadFromFile(std::string const & filename)
{
try
{
FileReader reader(filename);
NonOwningReaderSource src(reader);
Read(src);
}
catch (FileReader::Exception const & e)
{
LOG(LERROR, ("Exception while reading osm id to feature id mapping from file", filename,
". Msg:", e.Msg()));
return false;
}
return true;
}
};
} // namespace gen
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