Module org.apache.jena.arq

Package org.apache.jena.sparql.algebra.optimize

Class TransformFilterDisjunction

java.lang.Object

org.apache.jena.sparql.algebra.TransformCopy

org.apache.jena.sparql.algebra.optimize.TransformFilterDisjunction

All Implemented Interfaces:

Transform

public class TransformFilterDisjunction
extends TransformCopy

Filter disjunction. This covers the case of

  (filter (|| expr1 expr2) pattern)

where either or both of expr1 and expr2 are equalities that help ground the pattern. This includes ?x IN (....) so this optimization can a significant improvement.

Field Summary

Fields inherited from class org.apache.jena.sparql.algebra.TransformCopy

COPY_ALWAYS, COPY_ONLY_ON_CHANGE

Constructor Summary

Constructors

Constructor	Description
TransformFilterDisjunction()

Method Summary

Modifier and Type	Method	Description
static Op	expandDisjunction(Expr expr, Op subOp)
Op	transform(OpFilter opFilter, Op subOp)

Methods inherited from class org.apache.jena.sparql.algebra.TransformCopy

transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform

Methods inherited from class java.lang.Object

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

Constructor Details

TransformFilterDisjunction

public TransformFilterDisjunction()

Method Details

transform

public Op transform(OpFilter opFilter,
 Op subOp)

Specified by:

transform in interface Transform

Overrides:

transform in class TransformCopy

expandDisjunction

public static Op expandDisjunction(Expr expr,
 Op subOp)