com.carrotsearch.hppc

Class ShortByteScatterMap

java.lang.Object

com.carrotsearch.hppc.ShortByteHashMap

com.carrotsearch.hppc.ShortByteScatterMap

All Implemented Interfaces:

Preallocable, ShortByteAssociativeContainer, ShortByteMap, java.lang.Cloneable, java.lang.Iterable<ShortByteCursor>

@Generated(date="2023-04-24T17:14:49+0800",
           value="KTypeVTypeScatterMap.java")
public class ShortByteScatterMap
extends ShortByteHashMap

Same as ShortByteHashMap 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.ShortByteHashMap

ShortByteHashMap.KeysContainer

Field Summary

Fields inherited from class com.carrotsearch.hppc.ShortByteHashMap

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

Constructor Summary

Constructors

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

Method Summary

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

Methods inherited from class com.carrotsearch.hppc.ShortByteHashMap

addTo, allocateBuffers, allocateThenInsertThenRehash, clear, clone, containsKey, ensureCapacity, equalElements, 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

ShortByteScatterMap

public ShortByteScatterMap()

New instance with sane defaults.

ShortByteScatterMap

public ShortByteScatterMap(int expectedElements)

New instance with sane defaults.

ShortByteScatterMap

public ShortByteScatterMap(int expectedElements,
                           double loadFactor)

New instance with sane defaults.

Method Detail

hashKey

protected int hashKey(short key)

Description copied from class: ShortByteHashMap

Returns a hash code for the given key.

The default implementation mixes the hash of the key with ShortByteHashMap.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 ShortByteHashMap

from

public static ShortByteScatterMap from(short[] keys,
                                       byte[] values)

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