com.hp.hpl.jena.sparql.engine.iterator

Class QueryIterDefaulting

java.lang.Object

com.hp.hpl.jena.sparql.util.PrintSerializableBase

com.hp.hpl.jena.sparql.engine.iterator.QueryIteratorBase

com.hp.hpl.jena.sparql.engine.iterator.QueryIter

com.hp.hpl.jena.sparql.engine.iterator.QueryIterSub

com.hp.hpl.jena.sparql.engine.iterator.QueryIterDefaulting

All Implemented Interfaces:

QueryIterator, PrintSerializable, Iterator<Binding>, Printable, Closeable

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.

Field Summary

Fields inherited from class com.hp.hpl.jena.sparql.engine.iterator.QueryIteratorBase

traceIterators

Constructor Summary

Constructors

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

Method Summary

Methods

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

Methods inherited from class com.hp.hpl.jena.sparql.engine.iterator.QueryIter

close, getExecContext, getIteratorNumber, makeTracked, materialize, materialize, output, output

Methods inherited from class com.hp.hpl.jena.sparql.engine.iterator.QueryIteratorBase

cancel, debug, hasNext, next, nextBinding, remove

Methods inherited from class com.hp.hpl.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 com.hp.hpl.jena.sparql.util.PrintSerializable

toString

Constructor Detail

QueryIterDefaulting

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

Method Detail

wasDefaultObject

public boolean wasDefaultObject()

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