org.apache.sysds.runtime.instructions.spark.data

Class LazyIterableIterator<T>

java.lang.Object

org.apache.sysds.runtime.instructions.spark.data.LazyIterableIterator<T>

All Implemented Interfaces:

Iterable<T>, Iterator<T>

public abstract class LazyIterableIterator<T>
extends Object
implements Iterable<T>, Iterator<T>

This class is a generic base class for lazy, single pass iterator classes in order to simplify the implementation of lazy iterators for mapPartitions use cases. Note [SPARK-3369], which gives the reasons for backwards compatibility with regard to the iterable API despite Spark's single pass nature.

Constructor Summary

Constructors

Constructor and Description
LazyIterableIterator(Iterator<T> in)

Method Summary

Modifier and Type	Method and Description
boolean	hasNext()
Iterator<T>	iterator()
T	next()
void	remove()

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Methods inherited from interface java.util.Iterator

forEachRemaining

Constructor Detail

LazyIterableIterator

public LazyIterableIterator(Iterator<T> in)

Method Detail

iterator

public Iterator<T> iterator()

Specified by:

iterator in interface Iterable<T>

hasNext

public boolean hasNext()

Specified by:

hasNext in interface Iterator<T>

next

public T next()

Specified by:

next in interface Iterator<T>

remove

public void remove()

Specified by:

remove in interface Iterator<T>