Package org.eclipse.collections.impl.utility.internal

Class SetIterables

java.lang.Object

org.eclipse.collections.impl.utility.internal.SetIterables

public final class SetIterables
extends Object

Set algebra operations.

Most operations are non-destructive, i.e. no input sets are modified during execution. The exception is operations ending in "Into." These accept the target collection of the final calculation as the first parameter.

Method Summary

Modifier and Type	Method	Description
static <A,B> LazyIterable<Pair<A,B>>	cartesianProduct(SetIterable<A> set1, SetIterable<B> set2)
static <A,B,C> LazyIterable<C>	cartesianProduct(SetIterable<A> set1, SetIterable<B> set2, Function2<A,B,C> function)
static <E> MutableSet<E>	difference(SetIterable<? extends E> minuendSet, SetIterable<? extends E> subtrahendSet)
static <E,R extends Set<E>> R	differenceInto(SetIterable<? extends E> minuendSet, SetIterable<? extends E> subtrahendSet, R targetSet)
static <T> ImmutableSet<ImmutableSet<T>>	immutablePowerSet(Set<T> set)	Returns an Immutable version of powerset where the inner sets are also immutable.
static <E> MutableSet<E>	intersect(SetIterable<? extends E> setA, SetIterable<? extends E> setB)
static <E,R extends Set<E>> R	intersectInto(SetIterable<? extends E> setA, SetIterable<? extends E> setB, R targetSet)
static <E> boolean	isProperSubsetOf(SetIterable<? extends E> candidateSubset, SetIterable<? extends E> candidateSuperset)
static <E> boolean	isSubsetOf(SetIterable<? extends E> candidateSubset, SetIterable<? extends E> candidateSuperset)
static <T> MutableSet<MutableSet<T>>	powerSet(Set<T> set)
static <T> MutableSet<MutableSet<T>>	powerSet(UnifiedSetWithHashingStrategy<T> set)
static <E> MutableSet<E>	symmetricDifference(SetIterable<? extends E> setA, SetIterable<? extends E> setB)
static <E,R extends Set<E>> R	symmetricDifferenceInto(SetIterable<? extends E> setA, SetIterable<? extends E> setB, R targetSet)
static <E> MutableSet<E>	union(SetIterable<? extends E> setA, SetIterable<? extends E> setB)
static <E,R extends Set<E>> R	unionInto(SetIterable<? extends E> setA, SetIterable<? extends E> setB, R targetSet)

Methods inherited from class java.lang.Object

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

Method Detail

union

public static <E> MutableSet<E> union(SetIterable<? extends E> setA,
                                      SetIterable<? extends E> setB)

unionInto

public static <E,R extends Set<E>> R unionInto(SetIterable<? extends E> setA,
                                                     SetIterable<? extends E> setB,
                                                     R targetSet)

intersect

public static <E> MutableSet<E> intersect(SetIterable<? extends E> setA,
                                          SetIterable<? extends E> setB)

intersectInto

public static <E,R extends Set<E>> R intersectInto(SetIterable<? extends E> setA,
                                                         SetIterable<? extends E> setB,
                                                         R targetSet)

difference

public static <E> MutableSet<E> difference(SetIterable<? extends E> minuendSet,
                                           SetIterable<? extends E> subtrahendSet)

differenceInto

public static <E,R extends Set<E>> R differenceInto(SetIterable<? extends E> minuendSet,
                                                          SetIterable<? extends E> subtrahendSet,
                                                          R targetSet)

symmetricDifference

public static <E> MutableSet<E> symmetricDifference(SetIterable<? extends E> setA,
                                                    SetIterable<? extends E> setB)

symmetricDifferenceInto

public static <E,R extends Set<E>> R symmetricDifferenceInto(SetIterable<? extends E> setA,
                                                                   SetIterable<? extends E> setB,
                                                                   R targetSet)

isSubsetOf

public static <E> boolean isSubsetOf(SetIterable<? extends E> candidateSubset,
                                     SetIterable<? extends E> candidateSuperset)

isProperSubsetOf

public static <E> boolean isProperSubsetOf(SetIterable<? extends E> candidateSubset,
                                           SetIterable<? extends E> candidateSuperset)

powerSet

public static <T> MutableSet<MutableSet<T>> powerSet(Set<T> set)

powerSet

public static <T> MutableSet<MutableSet<T>> powerSet(UnifiedSetWithHashingStrategy<T> set)

immutablePowerSet

public static <T> ImmutableSet<ImmutableSet<T>> immutablePowerSet(Set<T> set)

Returns an Immutable version of powerset where the inner sets are also immutable.

cartesianProduct

public static <A,B> LazyIterable<Pair<A,B>> cartesianProduct(SetIterable<A> set1,
                                                                         SetIterable<B> set2)

cartesianProduct

public static <A,B,C> LazyIterable<C> cartesianProduct(SetIterable<A> set1,
                                                                   SetIterable<B> set2,
                                                                   Function2<A,B,C> function)