org.eclipse.rdf4j.common.iteration

Class LimitIteration<E,X extends Exception>

java.lang.Object

org.eclipse.rdf4j.common.iteration.AbstractCloseableIteration<E,X>

org.eclipse.rdf4j.common.iteration.IterationWrapper<E,X>

org.eclipse.rdf4j.common.iteration.LimitIteration<E,X>

All Implemented Interfaces:

AutoCloseable, CloseableIteration<E,X>, Iteration<E,X>

public class LimitIteration<E,X extends Exception>
extends IterationWrapper<E,X>

An Iteration that limits the amount of elements that it returns from an underlying Iteration to a fixed amount. This class returns the first limit elements from the underlying Iteration and drops the rest.

Field Summary

Fields inherited from class org.eclipse.rdf4j.common.iteration.IterationWrapper

wrappedIter

Constructor Summary

Constructors

Constructor and Description
LimitIteration(Iteration<? extends E,X> iter, long limit) Creates a new LimitIteration.

Method Summary

Modifier and Type	Method and Description
boolean	hasNext() Checks whether the wrapped Iteration contains more elements, closing this Iteration when this is not the case.
E	next() Returns the next element from the wrapped Iteration.

Methods inherited from class org.eclipse.rdf4j.common.iteration.IterationWrapper

handleClose, remove

Methods inherited from class org.eclipse.rdf4j.common.iteration.AbstractCloseableIteration

close, isClosed

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.eclipse.rdf4j.common.iteration.Iteration

stream

Constructor Detail

LimitIteration

public LimitIteration(Iteration<? extends E,X> iter,
                      long limit)

Creates a new LimitIteration.

Parameters:

iter - The underlying Iteration, must not be null.

limit - The number of query answers to return, must be >= 0.

Method Detail

hasNext

public boolean hasNext()
                throws X extends Exception

Description copied from class: IterationWrapper

Checks whether the wrapped Iteration contains more elements, closing this Iteration when this is not the case.

Specified by:

hasNext in interface Iteration<E,X extends Exception>

Overrides:

hasNext in class IterationWrapper<E,X extends Exception>

Returns:

true if the wrapped Iteration contains more elements, false otherwise.

Throws:

X

X extends Exception

next

public E next()
       throws X extends Exception

Description copied from class: IterationWrapper

Returns the next element from the wrapped Iteration.

Specified by:

next in interface Iteration<E,X extends Exception>

Overrides:

next in class IterationWrapper<E,X extends Exception>

Returns:

the next element in the iteration.

Throws:

X extends Exception