de.fuberlin.wiwiss.d2rq.engine

Class QueryIterTableSQL

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

de.fuberlin.wiwiss.d2rq.engine.QueryIterTableSQL

All Implemented Interfaces:

QueryIterator, PrintSerializable, Iterator<Binding>, org.openjena.atlas.io.Printable, org.openjena.atlas.lib.Closeable

public class QueryIterTableSQL
extends QueryIter

A QueryIterator over the bindings produced by a Relation. Works by running the underlying SQL query using a SQLIterator.

Author:

Richard Cyganiak (richard@cyganiak.de)

Field Summary

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

traceIterators

Method Summary

Methods

Modifier and Type	Method and Description
protected void	closeIterator()
static QueryIterator	create(NodeRelation table, ExecutionContext execCxt) Creates an instance, or a simpler QueryIterator if optimization is possible (e.g., the relation is empty).
static QueryIterator	create(Relation relation, Collection<BindingMaker> bindingMakers, ExecutionContext execCxt) Creates an instance, or a simpler QueryIterator if optimization is possible (e.g., the relation is empty).
protected boolean	hasNextBinding()
protected Binding	moveToNextBinding()
protected void	requestCancel()

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, isFinished, next, nextBinding, performClose, performRequestCancel, remove

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

output, toString, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, 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

Method Detail

create

public static QueryIterator create(Relation relation,
                   Collection<BindingMaker> bindingMakers,
                   ExecutionContext execCxt)

Creates an instance, or a simpler QueryIterator if optimization is possible (e.g., the relation is empty).

Returns:

A query iterator over the contents of the relation

create

public static QueryIterator create(NodeRelation table,
                   ExecutionContext execCxt)

Creates an instance, or a simpler QueryIterator if optimization is possible (e.g., the relation is empty).

Returns:

A query iterator over the contents of the node relation

hasNextBinding

protected boolean hasNextBinding()

Specified by:

hasNextBinding in class QueryIteratorBase

moveToNextBinding

protected Binding moveToNextBinding()

Specified by:

moveToNextBinding in class QueryIteratorBase

closeIterator

protected void closeIterator()

Specified by:

closeIterator in class QueryIteratorBase

requestCancel

protected void requestCancel()

Specified by:

requestCancel in class QueryIteratorBase