Library: Data
Package: DataCore
Header: Poco/Data/Column.h
Description
Column class is column data container. Data (a pointer to underlying STL container) is assigned to the class at construction time. Construction with null pointer is not allowed. This class owns the data assigned to it and deletes the storage on destruction.
Member Summary
Member Functions: begin, data, end, length, name, operator =, operator [], position, precision, reset, rowCount, swap, type, value
Types Aliases
Container
using Container = C;
ContainerPtr
using ContainerPtr = Poco::SharedPtr < C >;
Iterator
using Iterator = typename C::const_iterator;
RIterator
using RIterator = typename C::const_reverse_iterator;
Size
using Size = typename C::size_type;
Type
using Type = typename C::value_type;
Constructors
Column 
Creates the Column.
Column
Column(
Column && col
) noexcept;
Creates the Column.
Column
Column(
const MetaColumn & metaColumn,
Container * pData
);
Creates the Column.
Destructor
~Column
~Column();
Destroys the Column.
Member Functions
begin
Iterator begin() const;
Returns iterator pointing to the beginning of data storage vector.
data
Container & data();
Returns reference to contained data.
end
Iterator end() const;
Returns iterator pointing to the end of data storage vector.
length
std::size_t length() const;
Returns column maximum length.
name
const std::string & name() const;
Returns column name.
operator =
Column & operator = (
const Column & col
);
Assignment operator.
operator =
Column & operator = (
Column && col
) noexcept;
Assignment operator.
operator []
const Type & operator[] (
std::size_t row
) const;
Returns the field value in specified row.
position
std::size_t position() const;
Returns column position.
precision
std::size_t precision() const;
Returns column precision. Valid for floating point fields only (zero for other data types).
reset
void reset();
Clears and shrinks the storage.
rowCount
Size rowCount() const;
Returns number of rows.
swap
void swap(
Column & other
) noexcept;
Swaps the column with another one.
type
MetaColumn::ColumnDataType type() const;
Returns column type.
value
const Type & value(
std::size_t row
) const;
Returns the field value in specified row.