Package org.apache.jena.sparql.engine.ref

Class QueryEngineRef

java.lang.Object

org.apache.jena.sparql.engine.QueryEngineBase

org.apache.jena.sparql.engine.ref.QueryEngineRef

All Implemented Interfaces:

org.apache.jena.atlas.lib.Closeable, OpEval

Direct Known Subclasses:

QueryEngineRefQuad

public class QueryEngineRef
extends QueryEngineBase

"Reference" query engine - this simply executes the algebra expression as-is using a simple (non-scalable) execution strategy that follows the definition of SPARQL as closely as possible. The reference query engine does provide the algebra extensions.

Field Summary

Fields inherited from class org.apache.jena.sparql.engine.QueryEngineBase

queryEngineInfo

Constructor Summary

Constructors

Constructor	Description
QueryEngineRef(Op op, DatasetGraph dataset, Binding input, Context context)
QueryEngineRef(Op op, DatasetGraph dataset, Context context)

Method Summary

Modifier and Type	Method	Description
QueryIterator	eval(Op op, DatasetGraph dsg, Binding binding, Context context)
static QueryEngineFactory	getFactory()
static void	register()
static void	unregister()

Methods inherited from class org.apache.jena.sparql.engine.QueryEngineBase

close, evaluate, getOp, getPlan

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

QueryEngineRef

public QueryEngineRef(Op op,
                      DatasetGraph dataset,
                      Context context)

QueryEngineRef

public QueryEngineRef(Op op,
                      DatasetGraph dataset,
                      Binding input,
                      Context context)

Method Detail

eval

public QueryIterator eval(Op op,
                          DatasetGraph dsg,
                          Binding binding,
                          Context context)

getFactory

public static QueryEngineFactory getFactory()

register

public static void register()

unregister

public static void unregister()