Package org.kiwiproject.collect

Class KiwiSets

java.lang.Object

org.kiwiproject.collect.KiwiSets

public final class KiwiSets
extends Object

Utility methods for working with Set instances.

Method Summary

Modifier and Type	Method	Description
static <T> boolean	hasOneElement(Set<T> set)	Checks whether the specified set is non-null and has only one item.
static <T> boolean	isNotNullOrEmpty(Set<T> set)	Checks whether the specified set is neither null nor empty.
static <T> boolean	isNullOrEmpty(Set<T> set)	Checks whether the specified set is null or empty.

Methods inherited from class java.lang.Object

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

Method Details

isNullOrEmpty

public static <T> boolean isNullOrEmpty(Set<T> set)

Checks whether the specified set is null or empty.

Type Parameters:

T - the type of items in the set

Parameters:

set - the set

Returns:

true if set is null or empty; false otherwise

isNotNullOrEmpty

public static <T> boolean isNotNullOrEmpty(Set<T> set)

Checks whether the specified set is neither null nor empty.

Type Parameters:

T - the type of items in the set

Parameters:

set - the set

Returns:

true if set is neither null nor empty; false otherwise

hasOneElement

public static <T> boolean hasOneElement(Set<T> set)

Checks whether the specified set is non-null and has only one item.

Type Parameters:

T - the type of items in the set

Parameters:

set - the set

Returns:

true if set is non-null and has exactly one item; false