Package net.sf.freecol.common.util

Class RandomChoice<T>

java.lang.Object

net.sf.freecol.common.util.RandomChoice<T>

public class RandomChoice<T>
extends java.lang.Object

A class to provide flat and weighted random selection from a collection.

Field Summary

Fields

Modifier and Type	Field	Description
private T	object
private int	probability

Constructor Summary

Constructors

Constructor	Description
RandomChoice(T object, int probability)

Method Summary

Modifier and Type	Method	Description
T	getObject()
int	getProbability()
static <T> int	getTotalProbability(java.util.Collection<RandomChoice<T>> input)
static <T> T	getWeightedRandom(java.util.logging.Logger logger, java.lang.String logMe, java.util.Collection<RandomChoice<T>> input, java.util.Random random)
static <T> T	getWeightedRandom(java.util.logging.Logger logger, java.lang.String logMe, java.util.stream.Stream<RandomChoice<T>> input, java.util.Random random)
static <T> void	normalize(java.util.Collection<RandomChoice<T>> input, int expectedTotal)
private static <T> T	select(java.util.Collection<RandomChoice<T>> input, int probability)

Methods inherited from class java.lang.Object

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

Field Detail

probability

private int probability

object

private final T object

Constructor Detail

RandomChoice

public RandomChoice(T object,
                    int probability)

Method Detail

getProbability

public int getProbability()

getObject

public T getObject()

select

private static <T> T select(java.util.Collection<RandomChoice<T>> input,
                            int probability)

getTotalProbability

public static <T> int getTotalProbability(java.util.Collection<RandomChoice<T>> input)

getWeightedRandom

public static <T> T getWeightedRandom(java.util.logging.Logger logger,
                                      java.lang.String logMe,
                                      java.util.Collection<RandomChoice<T>> input,
                                      java.util.Random random)

getWeightedRandom

public static <T> T getWeightedRandom(java.util.logging.Logger logger,
                                      java.lang.String logMe,
                                      java.util.stream.Stream<RandomChoice<T>> input,
                                      java.util.Random random)

normalize

public static <T> void normalize(java.util.Collection<RandomChoice<T>> input,
                                 int expectedTotal)