com.carrotsearch.hppc

Class RandomizedHashOrderMixer

java.lang.Object

com.carrotsearch.hppc.RandomizedHashOrderMixer

All Implemented Interfaces:

HashOrderMixingStrategy, java.lang.Cloneable

public final class RandomizedHashOrderMixer
extends java.lang.Object
implements HashOrderMixingStrategy

Randomized hash order. Does not guarantee deterministic hash ordering between runs. In fact, it tries hard to avoid such guarantee.

Field Summary

Fields

Modifier and Type	Field and Description
static RandomizedHashOrderMixer	INSTANCE
protected java.util.concurrent.atomic.AtomicLong	seedMixer

Constructor Summary

Constructors

Constructor and Description
RandomizedHashOrderMixer()
RandomizedHashOrderMixer(long seed)

Method Summary

Modifier and Type	Method and Description
HashOrderMixingStrategy	clone()
int	newKeyMixer(int newContainerBufferSize) A new key mixer value.

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

INSTANCE

public static final RandomizedHashOrderMixer INSTANCE

seedMixer

protected final java.util.concurrent.atomic.AtomicLong seedMixer

Constructor Detail

RandomizedHashOrderMixer

public RandomizedHashOrderMixer()

RandomizedHashOrderMixer

public RandomizedHashOrderMixer(long seed)

Method Detail

newKeyMixer

public int newKeyMixer(int newContainerBufferSize)

Description copied from interface: HashOrderMixingStrategy

A new key mixer value. The value can be derived from the new buffer size of the container, but preferably should be random and unique.

Specified by:

newKeyMixer in interface HashOrderMixingStrategy

clone

public HashOrderMixingStrategy clone()

Specified by:

clone in interface HashOrderMixingStrategy

Overrides:

clone in class java.lang.Object

Returns:

Return a clone of this strategy. This should use a different mixing because cloned containers should have a different hash ordering.