com.carrotsearch.hppc

Class LongByteScatterMap

java.lang.Object

com.carrotsearch.hppc.LongByteHashMap

com.carrotsearch.hppc.LongByteScatterMap

All Implemented Interfaces:

LongByteAssociativeContainer, LongByteMap, Preallocable, java.lang.Cloneable, java.lang.Iterable<LongByteCursor>

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

Same as LongByteHashMap 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.LongByteHashMap

LongByteHashMap.KeysContainer

Field Summary

Fields inherited from class com.carrotsearch.hppc.LongByteHashMap

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

Constructor Summary

Constructors

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

Method Summary

Methods

Modifier and Type	Method and Description
static LongByteScatterMap	from(long[] keys, byte[] 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.LongByteHashMap

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

LongByteScatterMap

public LongByteScatterMap()

New instance with sane defaults.

LongByteScatterMap

public LongByteScatterMap(int expectedElements)

New instance with sane defaults.

LongByteScatterMap

public LongByteScatterMap(int expectedElements,
                  double loadFactor)

New instance with sane defaults.

Method Detail

hashKey

protected int hashKey(long key)

Description copied from class: LongByteHashMap

Returns a hash code for the given key.

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

from

public static LongByteScatterMap from(long[] keys,
                      byte[] values)

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