Package com.carrotsearch.hppc
Class ByteByteScatterMap
- java.lang.Object
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- com.carrotsearch.hppc.ByteByteHashMap
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- com.carrotsearch.hppc.ByteByteScatterMap
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- All Implemented Interfaces:
ByteByteAssociativeContainer
,ByteByteMap
,Preallocable
,java.lang.Cloneable
,java.lang.Iterable<ByteByteCursor>
@Generated(date="2024-05-16T12:00:00+0000", value="KTypeVTypeScatterMap.java") public class ByteByteScatterMap extends ByteByteHashMap
Same asByteByteHashMap
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.
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Nested Class Summary
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Nested classes/interfaces inherited from class com.carrotsearch.hppc.ByteByteHashMap
ByteByteHashMap.KeysContainer
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Field Summary
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Fields inherited from class com.carrotsearch.hppc.ByteByteHashMap
assigned, hasEmptyKey, keyMixer, keys, loadFactor, mask, orderMixer, resizeAt, values
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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.
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods 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
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Constructor Detail
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ByteByteScatterMap
public ByteByteScatterMap()
New instance with sane defaults.
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ByteByteScatterMap
public ByteByteScatterMap(int expectedElements)
New instance with sane defaults.
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ByteByteScatterMap
public ByteByteScatterMap(int expectedElements, double loadFactor)
New instance with sane defaults.
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Method Detail
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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 classByteByteHashMap
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from
public static ByteByteScatterMap from(byte[] keys, byte[] values)
Creates a hash map from two index-aligned arrays of key-value pairs.
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