com.google.common.collect

Class EmptyImmutableSet

java.lang.Object

java.util.AbstractCollection<E>

com.google.common.collect.ImmutableCollection<E>

com.google.common.collect.ImmutableSet<java.lang.Object>

com.google.common.collect.EmptyImmutableSet

All Implemented Interfaces:

java.io.Serializable, java.lang.Iterable<java.lang.Object>, java.util.Collection<java.lang.Object>, java.util.Set<java.lang.Object>

@GwtCompatible(serializable=true,
               emulated=true)
final class EmptyImmutableSet
extends ImmutableSet<java.lang.Object>

An empty immutable set.

Nested Class Summary

Nested classes/interfaces inherited from class com.google.common.collect.ImmutableSet

ImmutableSet.Builder<E>

Nested classes/interfaces inherited from class com.google.common.collect.ImmutableCollection

ImmutableCollection.ArrayBasedBuilder<E>

Field Summary

Fields

Modifier and Type	Field and Description
(package private) static EmptyImmutableSet	INSTANCE
private static long	serialVersionUID

Fields inherited from class com.google.common.collect.ImmutableSet

MAX_TABLE_SIZE

Constructor Summary

Constructors

Modifier	Constructor and Description
private	EmptyImmutableSet()

Method Summary

Modifier and Type	Method and Description
ImmutableList<java.lang.Object>	asList() Returns a list view of the collection.
boolean	contains(java.lang.Object target)
boolean	containsAll(java.util.Collection<?> targets)
(package private) int	copyIntoArray(java.lang.Object[] dst, int offset) Copies the contents of this immutable collection into the specified array at the specified offset.
boolean	equals(java.lang.Object object)
int	hashCode()
boolean	isEmpty()
(package private) boolean	isHashCodeFast() Returns true if the hashCode() method runs quickly.
(package private) boolean	isPartialView() Returns true if this immutable collection's implementation contains references to user-created objects that aren't accessible via this collection's methods.
UnmodifiableIterator<java.lang.Object>	iterator() Returns an unmodifiable iterator across the elements in this collection.
(package private) java.lang.Object	readResolve()
int	size()
java.lang.String	toString()

Methods inherited from class com.google.common.collect.ImmutableSet

builder, chooseTableSize, copyOf, copyOf, copyOf, copyOf, of, of, of, of, of, of, of, writeReplace

Methods inherited from class com.google.common.collect.ImmutableCollection

add, addAll, clear, createAsList, remove, removeAll, retainAll, toArray, toArray

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Set

add, addAll, clear, remove, removeAll, retainAll, spliterator, toArray, toArray

Methods inherited from interface java.util.Collection

parallelStream, removeIf, stream

Methods inherited from interface java.lang.Iterable

forEach

Field Detail

INSTANCE

static final EmptyImmutableSet INSTANCE

serialVersionUID

private static final long serialVersionUID

See Also:

Constant Field Values

Constructor Detail

EmptyImmutableSet

private EmptyImmutableSet()

Method Detail

size

public int size()

Specified by:

size in interface java.util.Collection<java.lang.Object>

Specified by:

size in interface java.util.Set<java.lang.Object>

Specified by:

size in class java.util.AbstractCollection<java.lang.Object>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface java.util.Collection<java.lang.Object>

Specified by:

isEmpty in interface java.util.Set<java.lang.Object>

Overrides:

isEmpty in class java.util.AbstractCollection<java.lang.Object>

contains

public boolean contains(@Nullable
                        java.lang.Object target)

Specified by:

contains in interface java.util.Collection<java.lang.Object>

Specified by:

contains in interface java.util.Set<java.lang.Object>

Overrides:

contains in class ImmutableCollection<java.lang.Object>

containsAll

public boolean containsAll(java.util.Collection<?> targets)

Specified by:

containsAll in interface java.util.Collection<java.lang.Object>

Specified by:

containsAll in interface java.util.Set<java.lang.Object>

Overrides:

containsAll in class java.util.AbstractCollection<java.lang.Object>

iterator

public UnmodifiableIterator<java.lang.Object> iterator()

Description copied from class: ImmutableCollection

Returns an unmodifiable iterator across the elements in this collection.

Specified by:

iterator in interface java.lang.Iterable<java.lang.Object>

Specified by:

iterator in interface java.util.Collection<java.lang.Object>

Specified by:

iterator in interface java.util.Set<java.lang.Object>

Specified by:

iterator in class ImmutableSet<java.lang.Object>

isPartialView

boolean isPartialView()

Description copied from class: ImmutableCollection

Returns true if this immutable collection's implementation contains references to user-created objects that aren't accessible via this collection's methods. This is generally used to determine whether copyOf implementations should make an explicit copy to avoid memory leaks.

Specified by:

isPartialView in class ImmutableCollection<java.lang.Object>

copyIntoArray

int copyIntoArray(java.lang.Object[] dst,
                  int offset)

Description copied from class: ImmutableCollection

Copies the contents of this immutable collection into the specified array at the specified offset. Returns offset + size().

Overrides:

copyIntoArray in class ImmutableCollection<java.lang.Object>

asList

public ImmutableList<java.lang.Object> asList()

Description copied from class: ImmutableCollection

Returns a list view of the collection.

Overrides:

asList in class ImmutableCollection<java.lang.Object>

equals

public boolean equals(@Nullable
                      java.lang.Object object)

Specified by:

equals in interface java.util.Collection<java.lang.Object>

Specified by:

equals in interface java.util.Set<java.lang.Object>

Overrides:

equals in class ImmutableSet<java.lang.Object>

hashCode

public final int hashCode()

Specified by:

hashCode in interface java.util.Collection<java.lang.Object>

Specified by:

hashCode in interface java.util.Set<java.lang.Object>

Overrides:

hashCode in class ImmutableSet<java.lang.Object>

isHashCodeFast

boolean isHashCodeFast()

Description copied from class: ImmutableSet

Returns true if the hashCode() method runs quickly.

Overrides:

isHashCodeFast in class ImmutableSet<java.lang.Object>

toString

public java.lang.String toString()

Overrides:

toString in class java.util.AbstractCollection<java.lang.Object>

readResolve

java.lang.Object readResolve()