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, java.util.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

QueryIterDefaulting(QueryIterator cIter, Binding _defaultObject, ExecutionContext qCxt)

Method Summary

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, output

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

abort, cancel, cancelAllowContinue, debug, hasNext, next, nextBinding, remove

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

output, 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

Methods inherited from interface org.openjena.atlas.io.Printable

output

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()