Package org.instancio.internal.random

Class RandomProviderImpl

java.lang.Object

org.instancio.internal.random.RandomProviderImpl

All Implemented Interfaces:

RandomProvider

public class RandomProviderImpl
extends Object
implements RandomProvider

Constructor Summary

Constructors

Constructor	Description
RandomProviderImpl()	Create an instance with a random seed value.
RandomProviderImpl(int seed)	Create an instance with the given seed value.

Method Summary

Modifier and Type	Method	Description
String	alphaNumeric(int length)	Generates a random alphanumeric String comprised of [a-z, A-Z, 0-9].
byte	byteRange(byte min, byte max)
char	character()	Returns a random alphabetic character, [a-z, A-Z].
boolean	diceRoll(boolean precondition)
String	digits(int length)	Generates a random String comprised of digits [0-9].
double	doubleRange(double min, double max)
float	floatRange(float min, float max)
int	getSeed()	Returns the seed value used by the random number generator.
int	intRange(int min, int max)
long	longRange(long min, long max)
String	lowerCaseAlphabetic(int length)	Generates a lower case String comprised of [a-z].
char	lowerCaseCharacter()	Returns a random lower alphabetic character, [a-z].
String	mixedCaseAlphabetic(int length)	Generates a random mixed case String comprised of [a-z, A-Z].
<T> T	oneOf(Collection<T> collection)	Returns a random element from given collection.
<T> T	oneOf(T[] array)	Returns a random element from given array.
short	shortRange(short min, short max)
boolean	trueOrFalse()
String	upperCaseAlphabetic(int length)	Generates a random upper case String comprised of [A-Z].
char	upperCaseCharacter()	Returns a random upper alphabetic character, [A-Z].

Methods inherited from class java.lang.Object

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

Constructor Detail

RandomProviderImpl

public RandomProviderImpl()

Create an instance with a random seed value.

RandomProviderImpl

public RandomProviderImpl(int seed)

Create an instance with the given seed value.

Parameters:

seed - for the random generator

Method Detail

getSeed

public int getSeed()

Description copied from interface: RandomProvider

Returns the seed value used by the random number generator.

Specified by:

getSeed in interface RandomProvider

Returns:

seed value

trueOrFalse

public boolean trueOrFalse()

Specified by:

trueOrFalse in interface RandomProvider

Returns:

a random true or false value with a 0.5 probability.

diceRoll

public boolean diceRoll(boolean precondition)

Specified by:

diceRoll in interface RandomProvider

Parameters:

precondition - required for returning true value

Returns:

a random true with 1/6 probability.

byteRange

public byte byteRange(byte min,
                      byte max)

Specified by:

byteRange in interface RandomProvider

Parameters:

min - lower bound

max - upper bound (exclusive)

Returns:

a random byte between the min and max, exclusive

shortRange

public short shortRange(short min,
                        short max)

Specified by:

shortRange in interface RandomProvider

Parameters:

min - lower bound

max - upper bound (exclusive)

Returns:

a random short between the min and max, exclusive

intRange

public int intRange(int min,
                    int max)

Specified by:

intRange in interface RandomProvider

Parameters:

min - lower bound

max - upper bound (exclusive)

Returns:

a random int between the min and max, exclusive

longRange

public long longRange(long min,
                      long max)

Specified by:

longRange in interface RandomProvider

Parameters:

min - lower bound

max - upper bound (exclusive)

Returns:

a random long between the min and max, exclusive

floatRange

public float floatRange(float min,
                        float max)

Specified by:

floatRange in interface RandomProvider

Parameters:

min - lower bound

max - upper bound (exclusive)

Returns:

a random float between the min and max, exclusive

doubleRange

public double doubleRange(double min,
                          double max)

Specified by:

doubleRange in interface RandomProvider

Parameters:

min - lower bound

max - upper bound (exclusive)

Returns:

a random double between the min and max, exclusive

character

public char character()

Description copied from interface: RandomProvider

Returns a random alphabetic character, [a-z, A-Z].

Specified by:

character in interface RandomProvider

Returns:

random character, either lower or upper case

lowerCaseCharacter

public char lowerCaseCharacter()

Description copied from interface: RandomProvider

Returns a random lower alphabetic character, [a-z].

Specified by:

lowerCaseCharacter in interface RandomProvider

Returns:

random lower character

upperCaseCharacter

public char upperCaseCharacter()

Description copied from interface: RandomProvider

Returns a random upper alphabetic character, [A-Z].

Specified by:

upperCaseCharacter in interface RandomProvider

Returns:

random uppercase character

lowerCaseAlphabetic

public String lowerCaseAlphabetic(int length)

Description copied from interface: RandomProvider

Generates a lower case String comprised of [a-z].

Specified by:

lowerCaseAlphabetic in interface RandomProvider

Parameters:

length - of a string to generate

Returns:

random lower case String with given length

upperCaseAlphabetic

public String upperCaseAlphabetic(int length)

Description copied from interface: RandomProvider

Generates a random upper case String comprised of [A-Z].

Specified by:

upperCaseAlphabetic in interface RandomProvider

Parameters:

length - of a string to generate

Returns:

random upper case String with given length

digits

public String digits(int length)

Description copied from interface: RandomProvider

Generates a random String comprised of digits [0-9].

Specified by:

digits in interface RandomProvider

Parameters:

length - of a string to generate

Returns:

random String comprised of digits with given length

alphaNumeric

public String alphaNumeric(int length)

Description copied from interface: RandomProvider

Generates a random alphanumeric String comprised of [a-z, A-Z, 0-9].

Specified by:

alphaNumeric in interface RandomProvider

Parameters:

length - of a string to generate

Returns:

random alphanumeric String with given length

mixedCaseAlphabetic

public String mixedCaseAlphabetic(int length)

Description copied from interface: RandomProvider

Generates a random mixed case String comprised of [a-z, A-Z].

Specified by:

mixedCaseAlphabetic in interface RandomProvider

Parameters:

length - of a string to generate

Returns:

random mixed case String with given length

oneOf

public <T> T oneOf(T[] array)

Description copied from interface: RandomProvider

Returns a random element from given array.

Specified by:

oneOf in interface RandomProvider

Type Parameters:

T - element type

Parameters:

array - to pick a value from

Returns:

random element

oneOf

public <T> T oneOf(Collection<T> collection)

Description copied from interface: RandomProvider

Returns a random element from given collection.

Specified by:

oneOf in interface RandomProvider

Type Parameters:

T - element type

Parameters:

collection - to pick a value from

Returns:

random element