Library: Data
Package: DataCore
Header: Poco/Data/Column.h
Description
Column class is column data container. Data (a pointer to vector of contained values) is assigned to the class through either constructor or set() member function. 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
DataVec
typedef std::vector < T > DataVec;
Iterator
typedef typename DataVec::const_iterator Iterator;
Size
typedef typename DataVec::size_type Size;
Constructors
Column 
Creates the Column.
Column
Column(
const MetaColumn & metaColumn,
std::vector < T > * 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
DataVec & 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
const T & operator[] (
std::size_t row
) const;
Returns the field value in specified row.
operator =
Column & operator = (
const Column & col
);
Assignment operator.
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
);
Swaps the column with another one.
type
MetaColumn::ColumnDataType type() const;
Returns column type.
value
const T & value(
std::size_t row
) const;
Returns the field value in specified row.