com.carrotsearch.hppc

Class ShortCharScatterMap

java.lang.Object

com.carrotsearch.hppc.ShortCharHashMap

com.carrotsearch.hppc.ShortCharScatterMap

All Implemented Interfaces:

Preallocable, ShortCharAssociativeContainer, ShortCharMap, java.lang.Cloneable, java.lang.Iterable<ShortCharCursor>

@Generated(date="2017-10-22T12:19:55+0200",
           value="KTypeVTypeScatterMap.java")
public class ShortCharScatterMap
extends ShortCharHashMap

Same as ShortCharHashMap 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.ShortCharHashMap

ShortCharHashMap.KeysContainer

Field Summary

Fields inherited from class com.carrotsearch.hppc.ShortCharHashMap

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

Constructor Summary

Constructors

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

Method Summary

Methods

Modifier and Type	Method and Description
static ShortCharScatterMap	from(short[] keys, char[] 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.ShortCharHashMap

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

Constructor Detail

ShortCharScatterMap

public ShortCharScatterMap()

New instance with sane defaults.

ShortCharScatterMap

public ShortCharScatterMap(int expectedElements)

New instance with sane defaults.

ShortCharScatterMap

public ShortCharScatterMap(int expectedElements,
                   double loadFactor)

New instance with sane defaults.

Method Detail

hashKey

protected int hashKey(short key)

Description copied from class: ShortCharHashMap

Returns a hash code for the given key.

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

from

public static ShortCharScatterMap from(short[] keys,
                       char[] values)

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