Package app.babylon.table.column

Interface ColumnCategorical<T>

All Superinterfaces:

Column, ColumnObject<T>

public interface ColumnCategorical<T>
extends ColumnObject<T>

An object column optimised for repeated values by storing dictionary-encoded categories.

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static interface	ColumnCategorical.Builder<T>

Nested classes/interfaces inherited from interface app.babylon.table.column.Column

Column.Type

Nested classes/interfaces inherited from interface app.babylon.table.column.ColumnObject

ColumnObject.Mode

Method Summary

Modifier and Type	Method	Description
static <T> ColumnCategorical.Builder<T>	builder(ColumnName name, Class<T> clazz)
default int	compare(int i, int j)
static <T> ColumnCategorical<T>	constant(ColumnName name, T value, int size, Column.Type type)
static <T> ColumnCategorical<T>	constant(ColumnName name, T value, int size, Class<T> valueClass)
default ColumnCategorical<T>	copy(ColumnName x)
T	get(int i)
default Column	getAsColumn(int i)
Collection<T>	getCategoricalValues(Collection<T> x)
int	getCategoryCode(int i)
int[]	getCategoryCodes(int[] x)
T	getCategoryValue(int categoryCode)
default Set<T>	getUniques(Set<T> x)
default Selection	select(Predicate<T> f)
default String	toString(int i)
<S> ColumnCategorical<S>	transform(Transformer<T,S> transformer)
ColumnCategorical<T>	view(ViewIndex rowIndex)

Methods inherited from interface app.babylon.table.column.Column

getName, getType, isAllSet, isNoneSet, size

Methods inherited from interface app.babylon.table.column.ColumnObject

first, getAll, isConstant, isSet, last, toString

Method Details

constant

static <T> ColumnCategorical<T> constant(ColumnName name,
 T value,
 int size,
 Class<T> valueClass)

constant

static <T> ColumnCategorical<T> constant(ColumnName name,
 T value,
 int size,
 Column.Type type)

builder

static <T> ColumnCategorical.Builder<T> builder(ColumnName name,
 Class<T> clazz)

get

T get(int i)

Specified by:

get in interface ColumnObject<T>

getCategoryCode

int getCategoryCode(int i)

getCategoryValue

T getCategoryValue(int categoryCode)

getCategoryCodes

int[] getCategoryCodes(int[] x)

getCategoricalValues

Collection<T> getCategoricalValues(Collection<T> x)

getUniques

default Set<T> getUniques(Set<T> x)

Specified by:

getUniques in interface ColumnObject<T>

view

ColumnCategorical<T> view(ViewIndex rowIndex)

Specified by:

view in interface Column

Specified by:

view in interface ColumnObject<T>

toString

default String toString(int i)

Specified by:

toString in interface Column

getAsColumn

default Column getAsColumn(int i)

Specified by:

getAsColumn in interface Column

copy

default ColumnCategorical<T> copy(ColumnName x)

Specified by:

copy in interface Column

compare

default int compare(int i,
 int j)

Specified by:

compare in interface Column

select

default Selection select(Predicate<T> f)

Specified by:

select in interface ColumnObject<T>

transform

<S> ColumnCategorical<S> transform(Transformer<T,S> transformer)

Specified by:

transform in interface ColumnObject<T>