com.hp.util

Class DistributedIndexGenerator

java.lang.Object

com.hp.util.DistributedIndexGenerator

public class DistributedIndexGenerator
extends Object

Implements iterators that generate indices randomly according to a specified distribution. For example:

 DistributedIndexGenerator gen = new DistributedIndexGenerator(30, 40);
 

will create iterators that produce values from the set {0, 1, 2} randomly, where the probabilities of occurrence are 30%, 40%, and 30% respectively.

 Iterator<Integer> it = gen.iterator(10);
 

returns an iterator that will generate 10 such random values.

Constructor Summary

Constructors

Constructor and Description
DistributedIndexGenerator(int... percentages) Constructs a generator that uses the specified distribution.

Method Summary

Methods

Modifier and Type	Method and Description
Iterator<Integer>	iterator(int count) Returns an iterator which will return the specified number of random indices drawn from the distribution configured for this generator.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

DistributedIndexGenerator

public DistributedIndexGenerator(int... percentages)

Constructs a generator that uses the specified distribution. At least one percentage must be specified, and the sum of all percentages specified must be less than 100.

Parameters:

percentages - the required percentage probabilities for indices 0, 1, ...

Method Detail

toString

public String toString()

Overrides:

toString in class Object

iterator

public Iterator<Integer> iterator(int count)

Returns an iterator which will return the specified number of random indices drawn from the distribution configured for this generator.

Parameters:

count - the number of random indices to return

Returns:

an iterator