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205 lines
3.4 KiB
C++
205 lines
3.4 KiB
C++
//
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// MetaColumn.h
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//
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// Library: Data
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// Package: DataCore
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// Module: MetaColumn
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//
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// Definition of the MetaColumn class.
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//
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// Copyright (c) 2006, Applied Informatics Software Engineering GmbH.
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// and Contributors.
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//
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// SPDX-License-Identifier: BSL-1.0
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//
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#ifndef Data_MetaColumn_INCLUDED
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#define Data_MetaColumn_INCLUDED
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#include "Poco/Data/Data.h"
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#include <cstddef>
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namespace Poco {
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namespace Data {
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class Data_API MetaColumn
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/// MetaColumn class contains column metadata information.
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{
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public:
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enum ColumnDataType
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{
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FDT_BOOL,
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FDT_INT8,
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FDT_UINT8,
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FDT_INT16,
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FDT_UINT16,
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FDT_INT32,
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FDT_UINT32,
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FDT_INT64,
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FDT_UINT64,
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FDT_FLOAT,
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FDT_DOUBLE,
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FDT_STRING,
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FDT_WSTRING,
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FDT_BLOB,
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FDT_CLOB,
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FDT_DATE,
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FDT_TIME,
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FDT_TIMESTAMP,
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FDT_UUID,
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FDT_UNKNOWN
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};
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MetaColumn();
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/// Creates the MetaColumn.
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explicit MetaColumn(std::size_t position,
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const std::string& name = "",
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ColumnDataType type = FDT_UNKNOWN,
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std::size_t length = 0,
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std::size_t precision = 0,
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bool nullable = false);
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/// Creates the MetaColumn.
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MetaColumn(const MetaColumn& other);
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/// Copy constructor.
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MetaColumn(MetaColumn&& other) noexcept;
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/// Move constructor.
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MetaColumn& operator = (const MetaColumn& other);
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/// Assignment operator.
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MetaColumn& operator = (MetaColumn&& other) noexcept;
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/// Assignment operator.
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void swap(MetaColumn& other);
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/// Swaps the contents with another instance.
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~MetaColumn();
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/// Destroys the MetaColumn.
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const std::string& name() const;
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/// Returns column name.
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std::size_t length() const;
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/// Returns column maximum length.
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std::size_t precision() const;
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/// Returns column precision.
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/// Valid for floating point fields only
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/// (zero for other data types).
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std::size_t position() const;
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/// Returns column position.
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ColumnDataType type() const;
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/// Returns column type.
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bool isNullable() const;
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/// Returns true if column allows null values, false otherwise.
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protected:
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void setName(const std::string& name);
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/// Sets the column name.
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void setLength(std::size_t length);
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/// Sets the column length.
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void setPrecision(std::size_t precision);
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/// Sets the column precision.
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void setType(ColumnDataType type);
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/// Sets the column data type.
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void setNullable(bool nullable);
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/// Sets the column nullability.
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private:
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std::string _name;
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std::size_t _length;
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std::size_t _precision;
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std::size_t _position;
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ColumnDataType _type;
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bool _nullable;
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};
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///
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/// inlines
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///
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inline const std::string& MetaColumn::name() const
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{
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return _name;
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}
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inline std::size_t MetaColumn::length() const
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{
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return _length;
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}
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inline std::size_t MetaColumn::precision() const
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{
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return _precision;
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}
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inline std::size_t MetaColumn::position() const
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{
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return _position;
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}
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inline MetaColumn::ColumnDataType MetaColumn::type() const
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{
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return _type;
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}
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inline bool MetaColumn::isNullable() const
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{
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return _nullable;
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}
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inline void MetaColumn::setName(const std::string& name)
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{
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_name = name;
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}
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inline void MetaColumn::setLength(std::size_t length)
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{
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_length = length;
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}
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inline void MetaColumn::setPrecision(std::size_t precision)
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{
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_precision = precision;
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}
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inline void MetaColumn::setType(ColumnDataType type)
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{
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_type = type;
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}
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inline void MetaColumn::setNullable(bool nullable)
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{
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_nullable = nullable;
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}
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} } // namespace Poco::Data
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#endif // Data_MetaColumn_INCLUDED
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