Package org.aksw.commons.index.util

Class SetSuppliers

java.lang.Object

org.aksw.commons.index.util.SetSuppliers

public class SetSuppliers
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	SetSuppliers.SetSupplierTreeSet<X>

Constructor Summary

Constructors

Constructor	Description
SetSuppliers()

Method Summary

Modifier and Type	Method	Description
static SetSupplier	forceCast(Supplier<Set<?>> setSupplier)	Force cast to the requested type.
static <X> SetSupplier	forTreeSet(Comparator<X> cmp)
static SetSupplier	none()	A supplier that supplies null instead of set instances.
static <X> CSetSupplier<X>	wrapAsCSet(SetSupplier setSupplier, Supplier<X> valueSupplier)

Methods inherited from class java.lang.Object

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

Constructor Details

SetSuppliers

public SetSuppliers()

Method Details

wrapAsCSet

public static <X> CSetSupplier<X> wrapAsCSet(SetSupplier setSupplier,
 Supplier<X> valueSupplier)

none

public static SetSupplier none()

A supplier that supplies null instead of set instances. In nested structures such null values may act as placeholders that are replaced in a post-processing step.

Returns:

'null' casted to the appropriate type.

forceCast

public static SetSupplier forceCast(Supplier<Set<?>> setSupplier)

Force cast to the requested type. Useful for e.g. TreeSets: While e.g. HashSet::new can supply set instances for any generic type, TreeSets are dependent on a comparator which may only work with specific types.

Parameters:

setSupplier -

Returns:

forTreeSet

public static <X> SetSupplier forTreeSet(Comparator<X> cmp)