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

java.lang.Object
  extended by com.hp.hpl.jena.sparql.util.PrintSerializableBase
      extended by com.hp.hpl.jena.sparql.engine.iterator.QueryIteratorBase
          extended by com.hp.hpl.jena.sparql.engine.iterator.QueryIter
              extended by com.hp.hpl.jena.sparql.engine.iterator.QueryIterSub
                  extended by 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
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()



Licenced under the Apache License, Version 2.0