tech.tablesaw.columns

Class AbstractColumn

java.lang.Object

tech.tablesaw.columns.AbstractColumn

All Implemented Interfaces:

Column

Direct Known Subclasses:

BooleanColumn, CategoryColumn, DateColumn, DateTimeColumn, DoubleColumn, FloatColumn, IntColumn, LongColumn, ShortColumn, TimeColumn

public abstract class AbstractColumn
extends Object
implements Column

Partial implementation of the Column interface

Constructor Summary

Constructors

Constructor and Description
AbstractColumn(ColumnMetadata metadata)
AbstractColumn(String name)

Method Summary

Modifier and Type	Method and Description
abstract void	appendCell(String stringvalue)
ColumnMetadata	columnMetadata()
int	columnWidth() Returns the width of the column in characters, for printing
String	comment()
Column	difference() Returns a new column of the same type as the receiver, such that the values in the new column contain the difference between each cell in the original and it's predecessor.
String	id() Returns a unique string that identifies this column.
String	metadata() Returns a String containing the column's metadata in json format.
String	name() Returns the column's name.
void	setComment(String comment)
void	setName(String name) Sets the columns name to the given string

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface tech.tablesaw.columns.Column

append, asBytes, byteSize, clear, copy, countMissing, countUnique, emptyCopy, emptyCopy, first, first, getString, isEmpty, isMissing, isNotMissing, last, last, print, rolling, rowComparator, size, sortAscending, sortDescending, subset, summary, title, toDoubleArray, type, unique

Constructor Detail

AbstractColumn

public AbstractColumn(String name)

AbstractColumn

public AbstractColumn(ColumnMetadata metadata)

Method Detail

name

public String name()

Description copied from interface: Column

Returns the column's name.

Specified by:

name in interface Column

Returns:

name as String

id

public String id()

Description copied from interface: Column

Returns a unique string that identifies this column.

Specified by:

id in interface Column

Returns:

the unique identifier as string.

metadata

public String metadata()

Description copied from interface: Column

Returns a String containing the column's metadata in json format.

Specified by:

metadata in interface Column

Returns:

metadata as String

setName

public void setName(String name)

Sets the columns name to the given string

Specified by:

setName in interface Column

Parameters:

name - The new name MUST be unique for any table containing this column

appendCell

public abstract void appendCell(String stringvalue)

Specified by:

appendCell in interface Column

comment

public String comment()

Specified by:

comment in interface Column

setComment

public void setComment(String comment)

Specified by:

setComment in interface Column

columnMetadata

public ColumnMetadata columnMetadata()

Specified by:

columnMetadata in interface Column

columnWidth

public int columnWidth()

Returns the width of the column in characters, for printing

Specified by:

columnWidth in interface Column

difference

public Column difference()

Description copied from interface: Column

Returns a new column of the same type as the receiver, such that the values in the new column contain the difference between each cell in the original and it's predecessor. The Missing Value Indicator is used for the first cell in the new column. (e.g. IntColumn.MISSING_VALUE)

Specified by:

difference in interface Column

Returns:

a Column