com.carrotsearch.hppc

Class ObjectByteScatterMap<KType>

java.lang.Object

com.carrotsearch.hppc.ObjectByteHashMap<KType>

com.carrotsearch.hppc.ObjectByteScatterMap<KType>

All Implemented Interfaces:

ObjectByteAssociativeContainer<KType>, ObjectByteMap<KType>, Preallocable, java.lang.Cloneable, java.lang.Iterable<ObjectByteCursor<KType>>

@Generated(date="2023-04-24T17:14:49+0800",
           value="KTypeVTypeScatterMap.java")
public class ObjectByteScatterMap<KType>
extends ObjectByteHashMap<KType>

Same as ObjectByteHashMap but does not implement per-instance key mixing strategy and uses a simpler (faster) bit distribution function.

Note: read about important differences between hash and scatter sets.

Nested Class Summary

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

ObjectByteHashMap.KeysContainer

Field Summary

Fields inherited from class com.carrotsearch.hppc.ObjectByteHashMap

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

Constructor Summary

Constructors

Constructor and Description
ObjectByteScatterMap() New instance with sane defaults.
ObjectByteScatterMap(int expectedElements) New instance with sane defaults.
ObjectByteScatterMap(int expectedElements, double loadFactor) New instance with sane defaults.

Method Summary

Modifier and Type	Method and Description
static <KType> ObjectByteScatterMap<KType>	from(KType[] keys, byte[] values) Creates a hash map from two index-aligned arrays of key-value pairs.
protected int	hashKey(KType key) Returns a hash code for the given key.

Methods inherited from class com.carrotsearch.hppc.ObjectByteHashMap

addTo, allocateBuffers, allocateThenInsertThenRehash, clear, clone, containsKey, ensureCapacity, equalElements, equals, equals, forEach, forEach, get, getOrDefault, hashCode, indexExists, indexGet, indexInsert, indexOf, indexReplace, isEmpty, iterator, keys, put, putAll, putAll, putIfAbsent, putOrAdd, rehash, release, remove, removeAll, removeAll, removeAll, shiftConflictingKeys, size, toString, values, verifyLoadFactor, visualizeKeyDistribution

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Constructor Detail

ObjectByteScatterMap

public ObjectByteScatterMap()

New instance with sane defaults.

ObjectByteScatterMap

public ObjectByteScatterMap(int expectedElements)

New instance with sane defaults.

ObjectByteScatterMap

public ObjectByteScatterMap(int expectedElements,
                            double loadFactor)

New instance with sane defaults.

Method Detail

hashKey

protected int hashKey(KType key)

Description copied from class: ObjectByteHashMap

Returns a hash code for the given key.

The default implementation mixes the hash of the key with ObjectByteHashMap.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 ObjectByteHashMap<KType>

from

public static <KType> ObjectByteScatterMap<KType> from(KType[] keys,
                                                       byte[] values)

Creates a hash map from two index-aligned arrays of key-value pairs.