org.apache.flink.runtime.util

Class EmptyMutableObjectIterator<E>

java.lang.Object

org.apache.flink.runtime.util.EmptyMutableObjectIterator<E>

All Implemented Interfaces:

MutableObjectIterator<E>

public final class EmptyMutableObjectIterator<E>
extends Object
implements MutableObjectIterator<E>

An empty mutable object iterator that never returns anything.

Constructor Summary

Constructors

Constructor and Description
EmptyMutableObjectIterator()

Method Summary

Modifier and Type	Method and Description
static <E> MutableObjectIterator<E>	get() Gets a singleton instance of the empty iterator.
E	next() Always returns null.
E	next(E target) Always returns null.

Methods inherited from class java.lang.Object

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

Constructor Detail

EmptyMutableObjectIterator

public EmptyMutableObjectIterator()

Method Detail

get

public static <E> MutableObjectIterator<E> get()

Gets a singleton instance of the empty iterator.

Type Parameters:

E - The type of the objects (not) returned by the iterator.

Returns:

An instance of the iterator.

next

public E next(E target)

Always returns null.

Specified by:

next in interface MutableObjectIterator<E>

Parameters:

target - The target object into which to place next element if E is mutable.

Returns:

The filled object or null if the iterator is exhausted.

See Also:

MutableObjectIterator.next(Object)

next

public E next()

Always returns null.

Specified by:

next in interface MutableObjectIterator<E>

Returns:

The object or null if the iterator is exhausted.

See Also:

MutableObjectIterator.next()