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#pragma once
#include "indexer/data_factory.hpp"
#include "indexer/interval_index.hpp"
#include "coding/var_serial_vector.hpp"
#include <cstdint>
#include <memory>
#include <vector>
/// Index bucket <--> Draw scale range.
/// Using default one-to-one mapping.
class ScaleIndexBase
{
public:
static uint32_t GetBucketsCount() { return 18; }
static uint32_t BucketByScale(int scale) { return static_cast<uint32_t>(scale); }
/// @return Range like [x, y).
static std::pair<uint32_t, uint32_t> ScaleRangeForBucket(uint32_t bucket)
{
return {bucket, bucket + 1};
}
};
template <class Reader>
class ScaleIndex : public ScaleIndexBase
{
public:
ScaleIndex() = default;
ScaleIndex(Reader const & reader, IndexFactory const & factory) { Attach(reader, factory); }
~ScaleIndex()
{
Clear();
}
void Clear()
{
m_IndexForScale.clear();
}
void Attach(Reader const & reader, IndexFactory const & factory)
{
Clear();
ReaderSource<Reader> source(reader);
VarSerialVectorReader<Reader> treesReader(source);
for (uint32_t i = 0; i < treesReader.Size(); ++i)
m_IndexForScale.push_back(factory.CreateIndex(treesReader.SubReader(i)));
}
template <typename F>
void ForEachInIntervalAndScale(F const & f, uint64_t beg, uint64_t end, int scale) const
{
auto const scaleBucket = BucketByScale(scale);
if (scaleBucket < m_IndexForScale.size())
{
for (size_t i = 0; i <= scaleBucket; ++i)
m_IndexForScale[i]->ForEach(f, beg, end);
}
}
private:
std::vector<std::unique_ptr<IntervalIndex<Reader, uint32_t>>> m_IndexForScale;
};
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