51 lines
1.2 KiB
C++
Executable File
51 lines
1.2 KiB
C++
Executable File
/**
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* Helper class for a vector of integer (stored as integer[] in the postgres database
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* $Id$
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* $HeadURL$
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* $Author$
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* Created by Christian Ehrlicher, SLSE, 2016-05-03
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*/
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#pragma once
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#include <QString>
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#include <map>
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#include <vector>
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#include <cstdint>
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namespace LtsUtils
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{
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template<typename T, typename C>
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class PgArray
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{
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public:
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using Type = T;
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using ContainerType = C;
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PgArray() = default;
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Q_DECL_CONSTEXPR explicit PgArray(const C &data)
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: m_data(data)
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{}
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Q_DECL_CONSTEXPR C operator()()const
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{
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return m_data;
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}
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QString toPgString() const;
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static PgArray fromPgString(const QString &str);
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private:
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C m_data;
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};
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// helper to convert a postgres array (one-dimensional) into a std::vector<T> and vice versa
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// { 1, 5, 5, 2, 9 }
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using IntArray = PgArray<int, std::vector<int>>; // integer[]
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using BigintArray = PgArray<int64_t, std::vector<int64_t>>; // bigint[]
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// helper to convert a two-dimensional postgres array into a std::map<T, T> and vice versa
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// { { 1, 2 }, { 4, 3 }, { 10, 1 } }
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using IntArray2D = PgArray<int, std::map<int, int>>; // integer[][]
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using BigintArray2D = PgArray<int64_t, std::map<int64_t, int64_t>>; // bigint[][]
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} // namespace LtsUtils
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