- All Superinterfaces:
ClosableIterator<RDFNode>
,org.apache.jena.atlas.lib.Closeable
,ExtendedIterator<RDFNode>
,Iterator<RDFNode>
,org.apache.jena.atlas.iterator.IteratorCloseable<RDFNode>
- All Known Implementing Classes:
ContNodeIteratorImpl
,NodeIteratorImpl
,SeqNodeIteratorImpl
An iterator which returns RDF nodes.
RDF iterators are standard Java iterators, except that they
have an extra method that returns specifically typed objects,
in this case RDF nodes, and have a close()
method.
that should be called to free resources if the application does
not complete the iteration.
-
Method Summary
Modifier and TypeMethodDescriptionvoid
close()
Terminate the iteration and free up resources.boolean
hasNext()
Determine if there any more values in the iteration.next()
Return the next RDFNode of the iteration.nextNode()
Return the next RDFNode of the iteration.void
remove()
Unsupported Operation.Methods inherited from interface org.apache.jena.util.iterator.ExtendedIterator
andThen, filterDrop, filterKeep, forEach, mapWith, nextOptional, removeNext, toList, toSet
Methods inherited from interface java.util.Iterator
forEachRemaining
-
Method Details
-
hasNext
boolean hasNext()Determine if there any more values in the iteration. -
next
Return the next RDFNode of the iteration.- Specified by:
next
in interfaceIterator<RDFNode>
- Returns:
- The next RDFNode from the iteration.
- Throws:
NoSuchElementException
- if there are no more nodes to be returned.
-
nextNode
Return the next RDFNode of the iteration.- Returns:
- The next RDFNode from the iteration.
- Throws:
NoSuchElementException
- if there are no more nodes to be returned.
-
remove
Unsupported Operation.- Specified by:
remove
in interfaceIterator<RDFNode>
- Throws:
NoSuchElementException
-
close
void close()Terminate the iteration and free up resources.Some implementations, e.g. on relational databases, hold resources while the iterator still exists. These will normally be freed when the iteration completes. However, if an application wishes to ensure they are freed without completing the iteration, this method should be called.
.- Specified by:
close
in interfaceClosableIterator<RDFNode>
- Specified by:
close
in interfaceorg.apache.jena.atlas.lib.Closeable
-