CouponHashSet.hpp

/*
 * Licensed to the Apache Software Foundation (ASF) under one
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 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
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 * specific language governing permissions and limitations
 * under the License.
 */
 
#ifndef _COUPONHASHSET_HPP_
#define _COUPONHASHSET_HPP_
 
#include "CouponList.hpp"
 
namespace datasketches {
 
template<typename A>
class CouponHashSet : public CouponList<A> {
  public:
    static CouponHashSet* newSet(const void* bytes, size_t len, const A& allocator);
    static CouponHashSet* newSet(std::istream& is, const A& allocator);
    CouponHashSet(uint8_t lgConfigK, target_hll_type tgtHllType, const A& allocator);
    CouponHashSet(const CouponHashSet& that, target_hll_type tgtHllType);
 
    virtual ~CouponHashSet() = default;
    virtual std::function<void(HllSketchImpl<A>*)> get_deleter() const;
 
  protected:
    using vector_int = std::vector<uint32_t, typename std::allocator_traits<A>::template rebind_alloc<uint32_t>>;
 
    virtual CouponHashSet* copy() const;
    virtual CouponHashSet* copyAs(target_hll_type tgtHllType) const;
 
    virtual HllSketchImpl<A>* couponUpdate(uint32_t coupon);
 
    virtual uint32_t getMemDataStart() const;
    virtual uint8_t getPreInts() const;
 
    friend class HllSketchImplFactory<A>;
 
  private:
    using ChsAlloc = typename std::allocator_traits<A>::template rebind_alloc<CouponHashSet<A>>;
    bool checkGrowOrPromote();
    void growHashSet(uint8_t tgtLgCoupArrSize);
};
 
}
 
#endif /* _COUPONHASHSET_HPP_ */