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72 lines
1.2 KiB
C
72 lines
1.2 KiB
C
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#ifndef DBMS_CORE_COLUMN_VECTOR_H
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#define DBMS_CORE_COLUMN_VECTOR_H
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#include <string.h>
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#include <DB/Core/Exception.h>
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#include <DB/Core/ErrorCodes.h>
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#include <DB/Columns/IColumn.h>
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namespace DB
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{
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/** Шаблон столбцов, которые используют для хранения std::vector.
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*/
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template <typename T>
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class ColumnVector : public IColumn
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{
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public:
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typedef T value_type;
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typedef std::vector<value_type> Container_t;
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ColumnVector() {}
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ColumnVector(size_t n) : data(n) {}
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size_t size() const
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{
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return data.size();
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}
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Field operator[](size_t n) const
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{
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return data[n];
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}
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void cut(size_t start, size_t length)
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{
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if (start + length > data.size())
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throw Exception("Parameter out of bound in IColumnVector<T>::cut() method.",
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ErrorCodes::PARAMETER_OUT_OF_BOUND);
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if (start == 0)
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data.resize(length);
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else
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{
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Container_t tmp(length);
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memcpy(&tmp[0], &data[start], length * sizeof(data[0]));
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tmp.swap(data);
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}
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}
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/** Более эффективные методы манипуляции */
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Container_t & getData()
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{
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return data;
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}
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const Container_t & getData() const
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{
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return data;
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}
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private:
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Container_t data;
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};
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}
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#endif
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