Initial commit

2026-07-12 14:22:00 +04:00
commit 49ecd4784c
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+#ifndef ALGHORITHM_DOUBLE_HASHING_H
+#define ALGHORITHM_DOUBLE_HASHING_H
+
+#include "family.h"
+
+BEGIN_NAMESPACE(BusinessLogic)
+BEGIN_NAMESPACE(Hash)
+BEGIN_NAMESPACE(Algorithm)
+BEGIN_NAMESPACE(DoubleHashing)
+
+class Product final : public Family::Product
+{
+private:
+    size_t m_firstHashFunction;
+    size_t m_secondHashFunction;
+    size_t m_multiplier;
+private:
+    friend Creator;
+    Product(size_t first, size_t second) : m_firstHashFunction(first), m_secondHashFunction(second)
+    {
+        if (first == second) {
+            throw std::invalid_argument("hash functions must be different");
+        }
+    }
+
+protected:
+    virtual size_t getFirstCoefficient() override {
+        m_multiplier = m_hashFunction->getHash(m_convertValue, m_firstHashFunction);
+        return m_hashFunction->getHash(m_convertValue, m_firstHashFunction);
+    }
+    virtual size_t getSecondCoefficient(size_t counter) override {
+        return counter * m_multiplier;
+    }
+};
+
+END_NAMESPACE // DoubleHashing
+END_NAMESPACE // Algorithm
+END_NAMESPACE // Hash
+END_NAMESPACE // BusinessLogic
+
+#endif // !ALGHORITHM_DOUBLE_HASHING_H