Package org.aksw.commons.collections.selector

Class WeightedSelectorImmutable<T>

java.lang.Object

org.aksw.commons.collections.selector.WeightedSelectorImmutable<T>

Type Parameters:

T -

All Implemented Interfaces:

Cloneable, WeightedSelector<T>

public class WeightedSelectorImmutable<T>
extends Object
implements WeightedSelector<T>

Immutable selector over an immutable collection of (item, weight) pairs. Weights are internally treated as doubles, however, any subclass of Number may be used in the pair itself. Access complexity is O(Log(n)) Similar to EnumeratedDistribution from commons math

Author:

Claus Stadler, Oct 12, 2018

Field Summary

Fields

Modifier and Type	Field	Description
protected double	nextOffset
protected NavigableMap<Double,Map.Entry<T,? extends Number>>	offsetToEntry

Constructor Summary

Constructors

Constructor	Description
WeightedSelectorImmutable(NavigableMap<Double,Map.Entry<T,? extends Number>> offsetToEntry, double nextOffset)

Method Summary

Modifier and Type	Method	Description
WeightedSelectorImmutable<T>	clone()	Cloning mechanism to allow simple implementation of backtracking.
static <X, T> WeightedSelectorImmutable<T>	create(Iterable<? extends Map.Entry<T,? extends Number>> entries)
static <T> WeightedSelectorImmutable<T>	create(Iterable<T> items, Function<? super T,? extends Number> getWeight)
static <X, T> WeightedSelectorImmutable<T>	create(Iterable<X> items, Function<? super X,? extends T> getEntity, Function<? super X,? extends Number> getWeight)
static <T> WeightedSelectorImmutable<T>	create(Map<T,? extends Number> map)
Collection<Map.Entry<T,? extends Number>>	entries()
Map.Entry<T,? extends Number>	sampleEntry(Number t)

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.aksw.commons.collections.selector.WeightedSelector

entryMap, isEmpty, sample

Field Details

offsetToEntry

protected NavigableMap<Double,Map.Entry<T,? extends Number>> offsetToEntry

nextOffset

protected double nextOffset

Constructor Details

WeightedSelectorImmutable

public WeightedSelectorImmutable(NavigableMap<Double,Map.Entry<T,? extends Number>> offsetToEntry,
 double nextOffset)

Method Details

clone

public WeightedSelectorImmutable<T> clone()

Description copied from interface: WeightedSelector

Cloning mechanism to allow simple implementation of backtracking.

Specified by:

clone in interface WeightedSelector<T>

Overrides:

clone in class Object

Returns:

sampleEntry

public Map.Entry<T,? extends Number> sampleEntry(Number t)

Specified by:

sampleEntry in interface WeightedSelector<T>

create

public static <X,
T> WeightedSelectorImmutable<T> create(Iterable<? extends Map.Entry<T,? extends Number>> entries)

create

public static <T> WeightedSelectorImmutable<T> create(Map<T,? extends Number> map)

create

public static <T> WeightedSelectorImmutable<T> create(Iterable<T> items,
 Function<? super T,? extends Number> getWeight)

create

public static <X,
T> WeightedSelectorImmutable<T> create(Iterable<X> items,
 Function<? super X,? extends T> getEntity,
 Function<? super X,? extends Number> getWeight)

entries

public Collection<Map.Entry<T,? extends Number>> entries()

Specified by:

entries in interface WeightedSelector<T>