Module org.apache.jena.arq

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

Class QueryIterDefaulting

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.QueryIterSub

org.apache.jena.sparql.engine.iterator.QueryIterDefaulting

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 QueryIterDefaulting
extends QueryIterSub

An iterator that returns at least one element from another iterator or a default value (once) if the wrapped iterator returns nothing.

Constructor Summary

Constructors

Constructor	Description
QueryIterDefaulting(QueryIterator cIter, Binding _defaultObject, ExecutionContext qCxt)

Method Summary

Modifier and Type	Method	Description
boolean	wasDefaultObject()	Returns true if the returned binding was the default object.

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

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

QueryIterDefaulting

public QueryIterDefaulting(QueryIterator cIter,
 Binding _defaultObject,
 ExecutionContext qCxt)

Method Details

wasDefaultObject

public boolean wasDefaultObject()

Returns true if the returned binding was the default object. Undef if before the iterator's first .hasNext()