Package org.apache.jena.sparql.engine

Class QueryEngineBase

java.lang.Object

org.apache.jena.sparql.engine.QueryEngineBase

All Implemented Interfaces:

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

Direct Known Subclasses:

QueryEngineMain, QueryEngineRef

public abstract class QueryEngineBase
extends java.lang.Object
implements OpEval, org.apache.jena.atlas.lib.Closeable

Main part of a QueryEngine - something that takes responsibility for a complete query execution

Field Summary

Fields

Modifier and Type	Field	Description
static QueryEngineInfo	queryEngineInfo

Method Summary

Modifier and Type	Method	Description
void	close()
QueryIterator	evaluate(Op op, DatasetGraph dsg, Binding binding, Context context)
Op	getOp()	Algebra expression (including any optimization)
Plan	getPlan()

Methods inherited from class java.lang.Object

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

Field Detail

queryEngineInfo

public static final QueryEngineInfo queryEngineInfo

Method Detail

getPlan

public Plan getPlan()

evaluate

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

Specified by:

evaluate in interface OpEval

getOp

public Op getOp()

Algebra expression (including any optimization)

close

public void close()

Specified by:

close in interface org.apache.jena.atlas.lib.Closeable