Package com.puresoltechnologies.streaming.iterators

Class StackedStreamIterator<T,F>

java.lang.Object

com.puresoltechnologies.streaming.iterators.AbstractStreamIterator<F>

com.puresoltechnologies.streaming.iterators.StackedStreamIterator<T,F>

Type Parameters:

T - is the original type of the base iterator.

F - is the type of this iterator.

All Implemented Interfaces:

StreamIterator<T>, Iterator<T>

public class StackedStreamIterator<T,F>
extends AbstractStreamIterator<F>

This decorator is used to stack multiple iterators, like iterating over directories and then on each directory iterating over the files.

Author:

Rick-Rainer Ludwig

Constructor Summary

Constructors

Constructor	Description
StackedStreamIterator(Iterator<T> origin, Function<T,? extends Iterator<F>> creator)

Method Summary

Modifier and Type	Method	Description
protected F	findNext()	This method looks for the next entry to be returned.

Methods inherited from class com.puresoltechnologies.streaming.iterators.AbstractStreamIterator

hasNext, next, peek

Methods inherited from interface java.util.Iterator

forEachRemaining, remove

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.puresoltechnologies.streaming.iterators.StreamIterator

empty, filter, flatMap, map, of, spliterator, stream

Constructor Detail

StackedStreamIterator

public StackedStreamIterator(Iterator<T> origin,
                             Function<T,? extends Iterator<F>> creator)

Method Detail

findNext

protected F findNext()

Description copied from class: AbstractStreamIterator

This method looks for the next entry to be returned. If no further entry is found, null is returned.

Specified by:

findNext in class AbstractStreamIterator<F>

Returns:

An object of T is returned representing the next entry to be returned by the iterator. null is returned in case no more entries are available.