BernoulliSampler (Flink : Java 1.18.1-cp2 API)

java.lang.Object
- org.apache.flink.api.java.sampling.RandomSampler<T>
- - org.apache.flink.api.java.sampling.BernoulliSampler<T>

Type Parameters:

T - The type of sample.
```
@Internal
public class BernoulliSampler<T>
extends RandomSampler<T>
```
A sampler implementation built upon a Bernoulli trail. This sampler is used to sample with fraction and without replacement. Whether an element is sampled or not is determined by a Bernoulli experiment.

See Also:

Gap Sampling

Field Summary
- Fields inherited from class org.apache.flink.api.java.sampling.RandomSampler
  emptyIterable, EPSILON

Constructor Summary

Constructors
Constructor	Description
`BernoulliSampler(double fraction)`	Create a Bernoulli sampler with sample fraction and default random number generator.
`BernoulliSampler(double fraction, long seed)`	Create a Bernoulli sampler with sample fraction and random number generator seed.
`BernoulliSampler(double fraction, Random random)`	Create a Bernoulli sampler with sample fraction and random number generator.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`Iterator<T>`	`sample(Iterator<T> input)`	Sample the input elements, for each input element, take a Bernoulli trail for sampling.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - BernoulliSampler
```
public BernoulliSampler(double fraction)
```
    Create a Bernoulli sampler with sample fraction and default random number generator.
    
    Parameters:
    
    fraction - Sample fraction, aka the Bernoulli sampler possibility.
  - BernoulliSampler
```
public BernoulliSampler(double fraction,
                        long seed)
```
    Create a Bernoulli sampler with sample fraction and random number generator seed.
    
    Parameters:
    
    fraction - Sample fraction, aka the Bernoulli sampler possibility.
    
    seed - Random number generator seed.
  - BernoulliSampler
```
public BernoulliSampler(double fraction,
                        Random random)
```
    Create a Bernoulli sampler with sample fraction and random number generator.
    
    Parameters:
    
    fraction - Sample fraction, aka the Bernoulli sampler possibility.
    
    random - The random number generator.
- Method Detail
  - sample
```
public Iterator<T> sample(Iterator<T> input)
```
    Sample the input elements, for each input element, take a Bernoulli trail for sampling.
    
    Specified by:
    
    sample in class RandomSampler<T>
    
    Parameters:
    
    input - Elements to be sampled.
    
    Returns:
    
    The sampled result which is lazy computed upon input elements.