com.carrotsearch.hppc

Class LongShortScatterMap

java.lang.Object

com.carrotsearch.hppc.LongShortHashMap

com.carrotsearch.hppc.LongShortScatterMap

All Implemented Interfaces:

LongShortAssociativeContainer, LongShortMap, Preallocable, java.lang.Cloneable, java.lang.Iterable<LongShortCursor>

@Generated(date="2016-10-25T13:31:57+0200",
           value="KTypeVTypeScatterMap.java")
public class LongShortScatterMap
extends LongShortHashMap

Same as LongShortHashMap 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.LongShortHashMap

LongShortHashMap.KeysContainer

Field Summary

Fields inherited from class com.carrotsearch.hppc.LongShortHashMap

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

Constructor Summary

Constructors

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

Method Summary

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

Methods inherited from class com.carrotsearch.hppc.LongShortHashMap

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

LongShortScatterMap

public LongShortScatterMap()

New instance with sane defaults.

LongShortScatterMap

public LongShortScatterMap(int expectedElements)

New instance with sane defaults.

LongShortScatterMap

public LongShortScatterMap(int expectedElements,
                           double loadFactor)

New instance with sane defaults.

Method Detail

hashKey

protected int hashKey(long key)

Description copied from class: LongShortHashMap

Returns a hash code for the given key.

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

from

public static LongShortScatterMap from(long[] keys,
                                       short[] values)

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