Package com.carrotsearch.hppc

Class ByteByteScatterMap

java.lang.Object

com.carrotsearch.hppc.ByteByteHashMap

com.carrotsearch.hppc.ByteByteScatterMap

All Implemented Interfaces:

ByteByteAssociativeContainer, ByteByteMap, Preallocable, Cloneable, Iterable<ByteByteCursor>

@Generated(date="2024-05-16T08:18:11+0000",
           value="KTypeVTypeScatterMap.java")
public class ByteByteScatterMap
extends ByteByteHashMap

Same as ByteByteHashMap 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.ByteByteHashMap

ByteByteHashMap.KeysContainer

Field Summary

Fields inherited from class com.carrotsearch.hppc.ByteByteHashMap

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

Constructor Summary

Constructors

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

Method Summary

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

Methods inherited from class com.carrotsearch.hppc.ByteByteHashMap

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

ByteByteScatterMap

public ByteByteScatterMap()

New instance with sane defaults.

ByteByteScatterMap

public ByteByteScatterMap(int expectedElements)

New instance with sane defaults.

ByteByteScatterMap

public ByteByteScatterMap(int expectedElements,
 double loadFactor)

New instance with sane defaults.

Method Details

hashKey

protected int hashKey(byte key)

Description copied from class: ByteByteHashMap

Returns a hash code for the given key.

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

from

public static ByteByteScatterMap from(byte[] keys,
 byte[] values)

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