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:

java.lang.Iterable<O>

Enclosing class:

CollectionUtils

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

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

Field Summary

Fields

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

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

cardinalityA, cardinalityB

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method and Description
java.util.Iterator<O>	iterator()
java.util.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 Detail

elements

private final java.util.Set<O> elements

Contains the unique elements of the two collections.

newList

private final java.util.List<O> newList

Output collection.

Constructor Detail

SetOperationCardinalityHelper

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

Create a new set operation helper from the two collections.

Parameters:

a - the first collection

b - the second collection

Method Detail

iterator

public java.util.Iterator<O> iterator()

Specified by:

iterator in interface java.lang.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 java.util.Collection<O> list()

Returns the resulting collection.

Returns:

the result