com.carrotsearch.hppc

Class IntObjectScatterMap<VType>

java.lang.Object

com.carrotsearch.hppc.IntObjectHashMap<VType>

com.carrotsearch.hppc.IntObjectScatterMap<VType>

All Implemented Interfaces:

IntObjectAssociativeContainer<VType>, IntObjectMap<VType>, Preallocable, java.lang.Cloneable, java.lang.Iterable<IntObjectCursor<VType>>

@Generated(date="2017-10-22T12:31:12+0200",
           value="KTypeVTypeScatterMap.java")
public class IntObjectScatterMap<VType>
extends IntObjectHashMap<VType>

Same as IntObjectHashMap 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.IntObjectHashMap

IntObjectHashMap.KeysContainer

Field Summary

Fields inherited from class com.carrotsearch.hppc.IntObjectHashMap

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

Constructor Summary

Constructors

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

Method Summary

Methods

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

Methods inherited from class com.carrotsearch.hppc.IntObjectHashMap

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, 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

IntObjectScatterMap

public IntObjectScatterMap()

New instance with sane defaults.

IntObjectScatterMap

public IntObjectScatterMap(int expectedElements)

New instance with sane defaults.

IntObjectScatterMap

public IntObjectScatterMap(int expectedElements,
                   double loadFactor)

New instance with sane defaults.

Method Detail

hashKey

protected int hashKey(int key)

Description copied from class: IntObjectHashMap

Returns a hash code for the given key.

The default implementation mixes the hash of the key with IntObjectHashMap.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 IntObjectHashMap<VType>

from

public static <VType> IntObjectScatterMap<VType> from(int[] keys,
                                      VType[] values)

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