Module org.pcollections

Package org.pcollections

Class MapPSet<E>

java.lang.Object

java.util.AbstractCollection<E>

java.util.AbstractSet<E>

org.pcollections.AbstractUnmodifiableSet<E>

org.pcollections.MapPSet<E>

Type Parameters:

E -

All Implemented Interfaces:

Serializable, Iterable<E>, Collection<E>, Set<E>, PCollection<E>, PSet<E>

public final class MapPSet<E>
extends AbstractUnmodifiableSet<E>
implements PSet<E>, Serializable

A map-backed persistent set.

If the backing map is thread-safe, then this implementation is thread-safe (assuming Java's AbstractSet is thread-safe), although its iterators may not be.

See Also:

• Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private static enum	MapPSet.In

Field Summary

Fields

Modifier and Type	Field	Description
private final PMap<E,Object>	map
private static final long	serialVersionUID

Constructor Summary

Constructors

Modifier	Constructor	Description
private	MapPSet(PMap<E,Object> map)

Method Summary

Modifier and Type	Method	Description
boolean	contains(Object e)
static <E> MapPSet<E>	from(PMap<E,?> map)
static <E> MapPSet<E>	from(PMap<E,?> map, E e)
static <E> MapPSet<E>	from(PMap<E,?> map, Collection<? extends E> list)
MapPSet<E>	intersect(Collection<? extends E> list)
Iterator<E>	iterator()
MapPSet<E>	minus(Object e)
MapPSet<E>	minusAll(Collection<?> list)
MapPSet<E>	plus(E e)
MapPSet<E>	plusAll(Collection<? extends E> list)
int	size()

Methods inherited from class org.pcollections.AbstractUnmodifiableSet

add, addAll, clear, remove, removeAll, removeIf, retainAll

Methods inherited from class java.util.AbstractSet

equals, hashCode

Methods inherited from class java.util.AbstractCollection

containsAll, isEmpty, toArray, toArray, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Collection

parallelStream, removeIf, stream, toArray

Methods inherited from interface java.lang.Iterable

forEach

Methods inherited from interface org.pcollections.PCollection

add, addAll, clear, remove, removeAll, retainAll

Methods inherited from interface java.util.Set

add, addAll, clear, containsAll, equals, hashCode, isEmpty, remove, removeAll, retainAll, spliterator, toArray, toArray

Field Details

serialVersionUID

private static final long serialVersionUID

See Also:

• Constant Field Values

map

private final PMap<E,Object> map

Constructor Details

MapPSet

private MapPSet(PMap<E,Object> map)

Method Details

from

public static <E> MapPSet<E> from(PMap<E,?> map)

Type Parameters:

E -

Parameters:

map -

Returns:

a PSet with the elements of map.keySet(), backed by map

from

public static <E> MapPSet<E> from(PMap<E,?> map,
 E e)

Type Parameters:

E -

Parameters:

map -

e -

Returns:

from(map).plus(e)

from

public static <E> MapPSet<E> from(PMap<E,?> map,
 Collection<? extends E> list)

Type Parameters:

E -

Parameters:

map -

list -

Returns:

from(map).plusAll(list)

iterator

public Iterator<E> iterator()

Specified by:

iterator in interface Collection<E>

Specified by:

iterator in interface Iterable<E>

Specified by:

iterator in interface Set<E>

Specified by:

iterator in class AbstractCollection<E>

size

public int size()

Specified by:

size in interface Collection<E>

Specified by:

size in interface Set<E>

Specified by:

size in class AbstractCollection<E>

contains

public boolean contains(Object e)

Specified by:

contains in interface Collection<E>

Specified by:

contains in interface Set<E>

Overrides:

contains in class AbstractCollection<E>

plus

public MapPSet<E> plus(E e)

Specified by:

plus in interface PCollection<E>

Specified by:

plus in interface PSet<E>

Parameters:

e -

Returns:

a collection which contains e and all of the elements of this

minus

public MapPSet<E> minus(Object e)

Specified by:

minus in interface PCollection<E>

Specified by:

minus in interface PSet<E>

Parameters:

e -

Returns:

this with a single instance of e removed, if e is in this

plusAll

public MapPSet<E> plusAll(Collection<? extends E> list)

Specified by:

plusAll in interface PCollection<E>

Specified by:

plusAll in interface PSet<E>

Parameters:

list -

Returns:

a collection which contains all of the elements of list and this

minusAll

public MapPSet<E> minusAll(Collection<?> list)

Specified by:

minusAll in interface PCollection<E>

Specified by:

minusAll in interface PSet<E>

Parameters:

list -

Returns:

this with all elements of list completely removed

intersect

public MapPSet<E> intersect(Collection<? extends E> list)

Specified by:

intersect in interface PSet<E>

Returns:

the equivalent of this.minusAll(this.minusAll(list)).