org.apache.flink.streaming.api.functions.source.datagen

Class RandomGenerator<T>

java.lang.Object

org.apache.flink.streaming.api.functions.source.datagen.RandomGenerator<T>

All Implemented Interfaces:

Serializable, Iterator<T>, DataGenerator<T>

@Experimental
public abstract class RandomGenerator<T>
extends Object
implements DataGenerator<T>

Random generator.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected float	nullRate
protected org.apache.commons.math3.random.RandomDataGenerator	random
protected boolean	varLen

Constructor Summary

Constructors

Constructor and Description
RandomGenerator()

Method Summary

Modifier and Type	Method and Description
static <T> RandomGenerator<T[]>	arrayGenerator(DataGenerator<T> generator, int len)
static RandomGenerator<Boolean>	booleanGenerator()
static RandomGenerator<Byte>	byteGenerator(byte min, byte max)
static RandomGenerator<Double>	doubleGenerator(double min, double max)
static RandomGenerator<Float>	floatGenerator(float min, float max)
boolean	hasNext()
static RandomGenerator<Integer>	intGenerator(int min, int max)
static RandomGenerator<Long>	longGenerator(long min, long max)
static <K,V> RandomGenerator<Map<K,V>>	mapGenerator(DataGenerator<K> key, DataGenerator<V> value, int size)
protected T	nextWithNullRate(java.util.function.Supplier<T> supplier)
void	open(String name, org.apache.flink.runtime.state.FunctionInitializationContext context, org.apache.flink.api.common.functions.RuntimeContext runtimeContext) Open and initialize state for DataGenerator.
static RandomGenerator<Short>	shortGenerator(short min, short max)
static RandomGenerator<String>	stringGenerator(int len)
RandomGenerator<T>	withNullRate(float nullRate)
RandomGenerator<T>	withVarLen(boolean varLen)

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.flink.streaming.api.functions.source.datagen.DataGenerator

snapshotState

Methods inherited from interface java.util.Iterator

forEachRemaining, next, remove

Field Detail

random

protected transient org.apache.commons.math3.random.RandomDataGenerator random

nullRate

protected float nullRate

varLen

protected boolean varLen

Constructor Detail

RandomGenerator

public RandomGenerator()

Method Detail

open

public void open(String name,
                 org.apache.flink.runtime.state.FunctionInitializationContext context,
                 org.apache.flink.api.common.functions.RuntimeContext runtimeContext)
          throws Exception

Description copied from interface: DataGenerator

Open and initialize state for DataGenerator. See CheckpointedFunction.initializeState(org.apache.flink.runtime.state.FunctionInitializationContext).

Specified by:

open in interface DataGenerator<T>

Parameters:

name - The state of DataGenerator should related to this name, make sure the name of state is different.

Throws:

Exception

withNullRate

public RandomGenerator<T> withNullRate(float nullRate)

nextWithNullRate

protected T nextWithNullRate(java.util.function.Supplier<T> supplier)

withVarLen

public RandomGenerator<T> withVarLen(boolean varLen)

hasNext

public boolean hasNext()

Specified by:

hasNext in interface Iterator<T>

longGenerator

public static RandomGenerator<Long> longGenerator(long min,
                                                  long max)

intGenerator

public static RandomGenerator<Integer> intGenerator(int min,
                                                    int max)

shortGenerator

public static RandomGenerator<Short> shortGenerator(short min,
                                                    short max)

byteGenerator

public static RandomGenerator<Byte> byteGenerator(byte min,
                                                  byte max)

floatGenerator

public static RandomGenerator<Float> floatGenerator(float min,
                                                    float max)

doubleGenerator

public static RandomGenerator<Double> doubleGenerator(double min,
                                                      double max)

stringGenerator

public static RandomGenerator<String> stringGenerator(int len)

booleanGenerator

public static RandomGenerator<Boolean> booleanGenerator()

arrayGenerator

public static <T> RandomGenerator<T[]> arrayGenerator(DataGenerator<T> generator,
                                                      int len)

mapGenerator

public static <K,V> RandomGenerator<Map<K,V>> mapGenerator(DataGenerator<K> key,
                                                           DataGenerator<V> value,
                                                           int size)