SplittableIterator (Flink : Core 2.2.0 API)

java.lang.Object
- org.apache.flink.util.SplittableIterator<T>

Type Parameters:

T - The type of elements returned by the iterator.

All Implemented Interfaces:

Serializable, Iterator<T>

Direct Known Subclasses:

LongValueSequenceIterator, NumberSequenceIterator
```
@Public
public abstract class SplittableIterator<T>
extends Object
implements Iterator<T>, Serializable
```
Abstract base class for iterators that can split themselves into multiple disjoint iterators. The union of these iterators returns the original iterator values.

See Also:

Serialized Form

Constructor Summary

Constructors
Constructor Description

SplittableIterator()

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method	Description
`abstract int`	`getMaximumNumberOfSplits()`	The maximum number of splits into which this iterator can be split up.
`Iterator<T>`	`getSplit(int num, int numPartitions)`	Splits this iterator into n partitions and returns the i-th partition out of those.
`abstract Iterator<T>[]`	`split(int numPartitions)`	Splits this iterator into a number disjoint iterators.

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

Methods inherited from interface java.util.Iterator
forEachRemaining, hasNext, next, remove

- Constructor Detail
  - SplittableIterator
```
public SplittableIterator()
```
- Method Detail
  - split
```
public abstract Iterator<T>[] split(int numPartitions)
```
    Splits this iterator into a number disjoint iterators. The union of these iterators returns the original iterator values.
    
    Parameters:
    
    numPartitions - The number of iterators to split into.
    
    Returns:
    
    An array with the split iterators.
  - getSplit
```
public Iterator<T> getSplit(int num,
                            int numPartitions)
```
    Splits this iterator into n partitions and returns the i-th partition out of those.
    
    Parameters:
    
    num - The partition to return (i).
    
    numPartitions - The number of partitions to split into (n).
    
    Returns:
    
    The iterator for the partition.
  - getMaximumNumberOfSplits
```
public abstract int getMaximumNumberOfSplits()
```
    The maximum number of splits into which this iterator can be split up.
    
    Returns:
    
    The maximum number of splits into which this iterator can be split up.