org.eclipse.rdf4j.query.algebra.evaluation.iterator

Class OrderIterator

java.lang.Object

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

org.eclipse.rdf4j.common.iteration.DelayedIteration<BindingSet,QueryEvaluationException>

org.eclipse.rdf4j.query.algebra.evaluation.iterator.OrderIterator

All Implemented Interfaces:

AutoCloseable, CloseableIteration<BindingSet,QueryEvaluationException>, Iteration<BindingSet,QueryEvaluationException>

Direct Known Subclasses:

LimitedSizeOrderIteration

public class OrderIterator
extends DelayedIteration<BindingSet,QueryEvaluationException>

Sorts the input and optionally applies limit and distinct.

Author:

James Leigh, Arjohn Kampman

Constructor Summary

Constructors

Constructor and Description
OrderIterator(CloseableIteration<BindingSet,QueryEvaluationException> iter, Comparator<BindingSet> comparator)
OrderIterator(CloseableIteration<BindingSet,QueryEvaluationException> iter, Comparator<BindingSet> comparator, long limit, boolean distinct)
OrderIterator(CloseableIteration<BindingSet,QueryEvaluationException> iter, Comparator<BindingSet> comparator, long limit, boolean distinct, long iterationSyncThreshold)

Method Summary

Modifier and Type	Method and Description
protected Iteration<BindingSet,QueryEvaluationException>	createIteration()
protected void	decrement(int amount)
protected void	handleClose()
protected void	increment()
void	remove()

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

hasNext, next

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

OrderIterator

public OrderIterator(CloseableIteration<BindingSet,QueryEvaluationException> iter,
                     Comparator<BindingSet> comparator)

OrderIterator

public OrderIterator(CloseableIteration<BindingSet,QueryEvaluationException> iter,
                     Comparator<BindingSet> comparator,
                     long limit,
                     boolean distinct)

OrderIterator

public OrderIterator(CloseableIteration<BindingSet,QueryEvaluationException> iter,
                     Comparator<BindingSet> comparator,
                     long limit,
                     boolean distinct,
                     long iterationSyncThreshold)

Method Detail

createIteration

protected Iteration<BindingSet,QueryEvaluationException> createIteration()
                                                                  throws QueryEvaluationException

Specified by:

createIteration in class DelayedIteration<BindingSet,QueryEvaluationException>

Throws:

QueryEvaluationException

increment

protected void increment()
                  throws QueryEvaluationException

Throws:

QueryEvaluationException

decrement

protected void decrement(int amount)
                  throws QueryEvaluationException

Throws:

QueryEvaluationException

remove

public void remove()
            throws QueryEvaluationException

Specified by:

remove in interface Iteration<BindingSet,QueryEvaluationException>

Overrides:

remove in class DelayedIteration<BindingSet,QueryEvaluationException>

Throws:

QueryEvaluationException

handleClose

protected void handleClose()
                    throws QueryEvaluationException

Overrides:

handleClose in class DelayedIteration<BindingSet,QueryEvaluationException>

Throws:

QueryEvaluationException