com.carrotsearch.hppc

Class ObjectIdentityHashSet<KType>

java.lang.Object

com.carrotsearch.hppc.AbstractObjectCollection<KType>

com.carrotsearch.hppc.ObjectHashSet<KType>

com.carrotsearch.hppc.ObjectIdentityHashSet<KType>

All Implemented Interfaces:

ObjectCollection<KType>, ObjectContainer<KType>, ObjectLookupContainer<KType>, ObjectSet<KType>, Preallocable, java.lang.Cloneable, java.lang.Iterable<ObjectCursor<KType>>

public class ObjectIdentityHashSet<KType>
extends ObjectHashSet<KType>

A reference-equality (identity) hash set.

Nested Class Summary

Nested classes/interfaces inherited from class com.carrotsearch.hppc.ObjectHashSet

ObjectHashSet.EntryIterator

Field Summary

Fields inherited from class com.carrotsearch.hppc.ObjectHashSet

assigned, hasEmptyKey, keyMixer, keys, loadFactor, mask, orderMixer, resizeAt

Constructor Summary

Constructors

Constructor and Description
ObjectIdentityHashSet() New instance with sane defaults.
ObjectIdentityHashSet(int expectedElements) New instance with sane defaults.
ObjectIdentityHashSet(int expectedElements, double loadFactor) New instance with sane defaults.
ObjectIdentityHashSet(int expectedElements, double loadFactor, HashOrderMixingStrategy orderMixer) New instance with the provided defaults.
ObjectIdentityHashSet(ObjectContainer<? extends KType> container) New instance copying elements from another ObjectContainer.

Method Summary

Modifier and Type	Method and Description
protected boolean	equals(java.lang.Object v1, java.lang.Object v2)
static <KType> ObjectIdentityHashSet<KType>	from(KType... elements) Create a set from a variable number of arguments or an array of KType.
protected int	hashKey(KType key) Returns a hash code for the given key.

Methods inherited from class com.carrotsearch.hppc.ObjectHashSet

add, addAll, addAll, addAll, allocateBuffers, allocateThenInsertThenRehash, clear, clone, contains, ensureCapacity, equals, forEach, forEach, hashCode, indexExists, indexGet, indexInsert, indexOf, indexReplace, isEmpty, iterator, rehash, release, remove, removeAll, removeAll, shiftConflictingKeys, size, toArray, verifyLoadFactor, visualizeKeyDistribution

Methods inherited from class com.carrotsearch.hppc.AbstractObjectCollection

removeAll, retainAll, retainAll, toArray, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.carrotsearch.hppc.ObjectCollection

removeAll, retainAll, retainAll

Methods inherited from interface com.carrotsearch.hppc.ObjectContainer

toArray

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Constructor Detail

ObjectIdentityHashSet

public ObjectIdentityHashSet()

New instance with sane defaults.

ObjectIdentityHashSet

public ObjectIdentityHashSet(int expectedElements)

New instance with sane defaults.

ObjectIdentityHashSet

public ObjectIdentityHashSet(int expectedElements,
                             double loadFactor)

New instance with sane defaults.

ObjectIdentityHashSet

public ObjectIdentityHashSet(int expectedElements,
                             double loadFactor,
                             HashOrderMixingStrategy orderMixer)

New instance with the provided defaults.

Parameters:

expectedElements - The expected number of elements guaranteed not to cause a rehash (inclusive).

loadFactor - The load factor for internal buffers. Insane load factors (zero, full capacity) are rejected by ObjectHashSet.verifyLoadFactor(double).

orderMixer - Hash key order mixing strategy. See HashOrderMixing for predefined implementations. Use constant mixers only if you understand the potential consequences.

ObjectIdentityHashSet

public ObjectIdentityHashSet(ObjectContainer<? extends KType> container)

New instance copying elements from another ObjectContainer.

Method Detail

hashKey

protected int hashKey(KType key)

Description copied from class: ObjectHashSet

Returns a hash code for the given key. The default implementation mixes the hash of the key with ObjectHashSet.keyMixer to differentiate hash order of keys between hash containers. Helps alleviate problems resulting from linear conflict resolution in open addressing. The output from this function should evenly distribute keys across the entire integer range.

Overrides:

hashKey in class ObjectHashSet<KType>

equals

protected boolean equals(java.lang.Object v1,
                         java.lang.Object v2)

Overrides:

equals in class AbstractObjectCollection<KType>

from

@SafeVarargs
public static <KType> ObjectIdentityHashSet<KType> from(KType... elements)

Create a set from a variable number of arguments or an array of KType. The elements are copied from the argument to the internal buffer.