Module org.apache.jena.arq

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

Class TransformPathFlatten

java.lang.Object

org.apache.jena.sparql.algebra.TransformCopy

org.apache.jena.sparql.algebra.optimize.TransformPathFlatten

All Implemented Interfaces:

Transform

public class TransformPathFlatten
extends TransformCopy

Perform the equivalent of the transactions in the SPARQL 1.1 spec. ARQ regards path transformation as an optimization. ARQ does not execute the exact transformation as per spec as there are better ways to do it for ARQ. For example,

• Path seq -> BGPs or a (sequence)
• "|" is not expanded into a union.

Field Summary

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

COPY_ALWAYS, COPY_ONLY_ON_CHANGE

Constructor Summary

Constructors

Constructor	Description
TransformPathFlatten()
TransformPathFlatten(PathCompiler pathCompiler)

Method Summary

Modifier and Type	Method	Description
Op	transform(OpPath opPath)

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

TransformPathFlatten

public TransformPathFlatten()

TransformPathFlatten

public TransformPathFlatten(PathCompiler pathCompiler)

Method Details

transform

public Op transform(OpPath opPath)

Specified by:

transform in interface Transform

Overrides:

transform in class TransformCopy