Module org.apache.jena.arq

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

Class TransformMergeBGPs

java.lang.Object

org.apache.jena.sparql.algebra.TransformCopy

org.apache.jena.sparql.algebra.optimize.TransformMergeBGPs

All Implemented Interfaces:

Transform

public class TransformMergeBGPs
extends TransformCopy

Merge BGPs, additionally merges the special OpTriple operator which is a BGP of a single triple pattern that may be introduced by other transforms

• (join BGP1 BGP2) => BGP
• (sequence ...BGP1 BGP2 ...) => (sequence ...BGP ...)

Field Summary

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

COPY_ALWAYS, COPY_ONLY_ON_CHANGE

Constructor Summary

Constructors

Constructor	Description
TransformMergeBGPs()

Method Summary

Modifier and Type	Method	Description
Op	transform(OpJoin opJoin, Op left, Op right)
Op	transform(OpSequence opSequence, List<Op> elts)

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

Methods inherited from class java.lang.Object

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

Constructor Details

TransformMergeBGPs

public TransformMergeBGPs()

Method Details

transform

public Op transform(OpJoin opJoin,
 Op left,
 Op right)

Specified by:

transform in interface Transform

Overrides:

transform in class TransformCopy

transform

public Op transform(OpSequence opSequence,
 List<Op> elts)

Specified by:

transform in interface Transform

Overrides:

transform in class TransformCopy