Module org.apache.jena.arq

Package org.apache.jena.atlas.test

Class Gen

java.lang.Object

org.apache.jena.atlas.test.Gen

public class Gen
extends Object

Support for testing. May be generally useful

Constructor Summary

Constructors

Constructor	Description
Gen()

Method Summary

Modifier and Type	Method	Description
static int[]	permute(int[] x)	Pull items out of the list in a random order
static int[]	rand(int numRand, int low, int high)	Generate a random sequence between low (inclusive) and high (exclusive): may include duplicates.
static int[]	rand(int numRand, int low, int high, boolean allDifferent)	Generate a random sequence between low (inclusive) and high (exclusive) - with duplicates or not
static int[]	shuffle(int[] x, int num)	Do a number of random pair-wise swaps
static String	strings(int[] keys)

Methods inherited from class java.lang.Object

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

Constructor Details

Gen

public Gen()

Method Details

rand

public static int[] rand(int numRand,
 int low,
 int high)

Generate a random sequence between low (inclusive) and high (exclusive): may include duplicates.

rand

public static int[] rand(int numRand,
 int low,
 int high,
 boolean allDifferent)

Generate a random sequence between low (inclusive) and high (exclusive) - with duplicates or not

permute

public static int[] permute(int[] x)

Pull items out of the list in a random order

shuffle

public static int[] shuffle(int[] x,
 int num)

Do a number of random pair-wise swaps

strings

public static String strings(int[] keys)