Package org.optaplanner.core.impl.heuristic.selector.common.nearby

Class BlockDistributionNearbyRandom

java.lang.Object

org.optaplanner.core.impl.heuristic.selector.common.nearby.BlockDistributionNearbyRandom

All Implemented Interfaces:

NearbyRandom

public class BlockDistributionNearbyRandom
extends Object
implements NearbyRandom

Field Summary

Fields

Modifier and Type	Field	Description
protected int	sizeMaximum
protected int	sizeMinimum
protected double	sizeRatio
protected double	uniformDistributionProbability

Constructor Summary

Constructors

Constructor	Description
BlockDistributionNearbyRandom(int sizeMinimum, int sizeMaximum, double sizeRatio, double uniformDistributionProbability)

Method Summary

Modifier and Type	Method	Description
int	getOverallSizeMaximum()	Used to limit the RAM memory size of the nearby distance matrix.
int	nextInt(Random random, int nearbySize)

Methods inherited from class java.lang.Object

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

Field Detail

sizeMinimum

protected final int sizeMinimum

sizeMaximum

protected final int sizeMaximum

sizeRatio

protected final double sizeRatio

uniformDistributionProbability

protected final double uniformDistributionProbability

Constructor Detail

BlockDistributionNearbyRandom

public BlockDistributionNearbyRandom(int sizeMinimum,
                                     int sizeMaximum,
                                     double sizeRatio,
                                     double uniformDistributionProbability)

Method Detail

nextInt

public int nextInt(Random random,
                   int nearbySize)

Specified by:

nextInt in interface NearbyRandom

Parameters:

random - never null

nearbySize - never negative. The number of available values to select from. Normally this is the size of the value range for a non-chained variable and the size of the value range (= size of the entity list) minus 1 for a chained variable.

Returns:

0 <= x < nearbySize

getOverallSizeMaximum

public int getOverallSizeMaximum()

Description copied from interface: NearbyRandom

Used to limit the RAM memory size of the nearby distance matrix.

Specified by:

getOverallSizeMaximum in interface NearbyRandom

Returns:

one more than the maximum number that NearbyRandom.nextInt(Random, int) can return, Integer.MAX_VALUE if there is none