Package tools.refinery.interpreter.rete.itc.alg.util

Class CollectionHelper

java.lang.Object

tools.refinery.interpreter.rete.itc.alg.util.CollectionHelper

public class CollectionHelper
extends Object

Method Summary

Modifier and Type	Method	Description
static <V> Set<V>	difference(Set<V> set1, Set<V> set2)	Returns the difference of two sets (S1\S2).
static <V> Set<V>	intersection(Set<V> set1, Set<V> set2)	Returns the intersection of two sets.

Methods inherited from class java.lang.Object

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

Method Details

intersection

public static <V> Set<V> intersection(Set<V> set1,
 Set<V> set2)

Returns the intersection of two sets. It calls Set.retainAll(java.util.Collection) but returns a new set containing the elements of the intersection.

Parameters:

set1 - the first set (can be null, interpreted as empty)

set2 - the second set (can be null, interpreted as empty)

Returns:

the intersection of the sets

Since:

1.7

difference

public static <V> Set<V> difference(Set<V> set1,
 Set<V> set2)

Returns the difference of two sets (S1\S2). It calls Set.removeAll(java.util.Collection) but returns a new set containing the elements of the difference.

Parameters:

set1 - the first set (can be null, interpreted as empty)

set2 - the second set (can be null, interpreted as empty)

Returns:

the difference of the sets

Since:

1.7