Package org.apache.commons.collections4

Class CollectionUtils.SetOperationCardinalityHelper<O>

java.lang.Object

org.apache.commons.collections4.CollectionUtils.CardinalityHelper<O>

org.apache.commons.collections4.CollectionUtils.SetOperationCardinalityHelper<O>

Type Parameters:

O - the element type

All Implemented Interfaces:

Iterable<O>

Enclosing class:

CollectionUtils

private static class CollectionUtils.SetOperationCardinalityHelper<O>
extends CollectionUtils.CardinalityHelper<O>
implements Iterable<O>

Helper class for set-related operations, e.g. union, subtract, intersection.

Field Summary

Fields

Modifier and Type	Field	Description
private final Set<O>	elements	Contains the unique elements of the two collections.
private final List<O>	newList	Output collection.

Fields inherited from class org.apache.commons.collections4.CollectionUtils.CardinalityHelper

cardinalityA, cardinalityB

Constructor Summary

Constructors

Constructor	Description
SetOperationCardinalityHelper(Iterable<? extends O> a, Iterable<? extends O> b)	Create a new set operation helper from the two collections.

Method Summary

Modifier and Type	Method	Description
Iterator<O>	iterator()
Collection<O>	list()	Returns the resulting collection.
void	setCardinality(O obj, int count)	Add the object count times to the result collection.

Methods inherited from class org.apache.commons.collections4.CollectionUtils.CardinalityHelper

freqA, freqB, max, min

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Field Details

elements

private final Set<O> elements

Contains the unique elements of the two collections.

newList

private final List<O> newList

Output collection.

Constructor Details

SetOperationCardinalityHelper

public SetOperationCardinalityHelper(Iterable<? extends O> a,
 Iterable<? extends O> b)

Create a new set operation helper from the two collections.

Parameters:

a - the first collection

b - the second collection

Method Details

iterator

public Iterator<O> iterator()

Specified by:

iterator in interface Iterable<O>

setCardinality

public void setCardinality(O obj,
 int count)

Add the object count times to the result collection.

Parameters:

obj - the object to add

count - the count

list

public Collection<O> list()

Returns the resulting collection.

Returns:

the result