SSF.Util.Random
Class RandomDistribution

java.lang.Object
  |
  +--cern.colt.PersistentObject
        |
        +--cern.jet.random.AbstractDistribution
              |
              +--SSF.Util.Random.RandomDistribution

All Implemented Interfaces:

java.lang.Cloneable, cern.colt.function.DoubleFunction, cern.colt.function.IntFunction, java.io.Serializable

public class RandomDistribution

extends AbstractDistribution

Simplifying wrapper for AbstractDistribution. A RandomDistribution simply holds a reference to an AbstractDistribution, to which it delegates the nextInt() and nextDouble() methods. This allows us to hide AbstractDistribution from the SSFNet users.

Unfortunately, it also hides the details of the underlying distribution from the user --- power users may wish to access the underlying distribution in order to cast it to a known distribution from the CERN package.

For example, if we have a RandomDistribution whose implementation is an instance of cern.jet.random.Exponential, we might want to access ((Exponential)getImplementation()).pdf(x), the probability distribution function.

See Also:

Serialized Form

Field Summary

Fields inherited from class cern.jet.random.AbstractDistribution

randomGenerator

Constructor Summary

protected

RandomDistribution(AbstractDistribution dist)

Method Summary

AbstractDistribution	getImplementation()
double	nextDouble() Returns a random number from the distribution.
int	nextInt() Returns a random number from the distribution; returns (int) Math.round(nextDouble()).

Methods inherited from class cern.jet.random.AbstractDistribution

apply, apply, clone, getRandomGenerator, makeDefaultGenerator, setRandomGenerator

Methods inherited from class java.lang.Object

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

Constructor Detail

RandomDistribution

protected RandomDistribution(AbstractDistribution dist)

Method Detail

getImplementation

public AbstractDistribution getImplementation()

nextDouble

public final double nextDouble()

Description copied from class: AbstractDistribution

Returns a random number from the distribution.

Specified by:

nextDouble in class AbstractDistribution

nextInt

public final int nextInt()

Description copied from class: AbstractDistribution

Returns a random number from the distribution; returns (int) Math.round(nextDouble()). Override this method if necessary.

Overrides:

nextInt in class AbstractDistribution