Module org.apache.jena.arq

Package org.apache.jena.sparql.engine.iterator

Class QueryIterDistinct

java.lang.Object

org.apache.jena.sparql.util.PrintSerializableBase

org.apache.jena.sparql.engine.iterator.QueryIteratorBase

org.apache.jena.sparql.engine.iterator.QueryIter

org.apache.jena.sparql.engine.iterator.QueryIter1

org.apache.jena.sparql.engine.iterator.QueryIterDistinct

All Implemented Interfaces:

Iterator<Binding>, org.apache.jena.atlas.io.Printable, org.apache.jena.atlas.iterator.IteratorCloseable<Binding>, org.apache.jena.atlas.lib.Closeable, QueryIterator, PrintSerializable

public class QueryIterDistinct
extends QueryIter1

A QueryIterator that suppresses items already seen. This will stream results until a threshold is passed. At that point, it will fill a disk-backed DistinctDataNet, then yield not return any results until the input iterator has been exhausted.

See Also:

• DistinctDataBag

Constructor Summary

Constructors

Constructor	Description
QueryIterDistinct(QueryIterator qIter, List<SortCondition> preserveOrder, ExecutionContext execCxt)

Method Summary

Methods inherited from class org.apache.jena.sparql.engine.iterator.QueryIter1

output

Methods inherited from class org.apache.jena.sparql.engine.iterator.QueryIter

close, flatMap, getExecContext, getIteratorNumber, makeTracked, map, materialize, materialize, output

Methods inherited from class org.apache.jena.sparql.engine.iterator.QueryIteratorBase

cancel, hasNext, next, nextBinding, remove

Methods inherited from class org.apache.jena.sparql.util.PrintSerializableBase

toString, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Iterator

forEachRemaining

Methods inherited from interface org.apache.jena.sparql.util.PrintSerializable

toString

Methods inherited from interface org.apache.jena.sparql.engine.QueryIterator

isJoinIdentity

Constructor Details

QueryIterDistinct

public QueryIterDistinct(QueryIterator qIter,
 List<SortCondition> preserveOrder,
 ExecutionContext execCxt)