Package org.aksw.jenax.sparql.algebra.optimize

Class TrackingTransformConditionalFunctionInversion

java.lang.Object

org.apache.jena.sparql.algebra.TransformCopy

org.aksw.jenax.sparql.algebra.walker.TrackingTransformCopy<CBinding>

org.aksw.jenax.sparql.algebra.optimize.TrackingTransformConditionalFunctionInversion

All Implemented Interfaces:

org.apache.jena.sparql.algebra.Transform

public class TrackingTransformConditionalFunctionInversion
extends TrackingTransformCopy<CBinding>

This class checks for expressions of the form [STR(?p) = 'const'] and if valueSpace(?p) is limited to IRI then it rewrites the expression as [?p = <const>].

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
class	TrackingTransformConditionalFunctionInversion.BeforeVisitor

Field Summary

Fields

Modifier and Type	Field	Description
protected Map<org.aksw.commons.path.core.Path<String>,Map<org.apache.jena.sparql.expr.Expr,VSpace>>	afterConditions
protected Map<org.aksw.commons.path.core.Path<String>,Map<org.apache.jena.sparql.expr.Expr,VSpace>>	beforeConditions
protected TrackingTransformConditionalFunctionInversion.BeforeVisitor	beforeVisitor

Fields inherited from class org.aksw.jenax.sparql.algebra.walker.TrackingTransformCopy

tracker

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

COPY_ALWAYS, COPY_ONLY_ON_CHANGE

Constructor Summary

Constructors

Constructor	Description
TrackingTransformConditionalFunctionInversion(Tracker<CBinding> pathState)

Method Summary

Modifier and Type	Method	Description
static Map.Entry<org.apache.jena.sparql.expr.NodeValue,org.apache.jena.sparql.expr.Expr>	applyInverseFunction(Map.Entry<org.apache.jena.sparql.expr.NodeValue,org.apache.jena.sparql.expr.Expr> e, Map<org.apache.jena.sparql.expr.Expr,VSpace> exprToValueSpace)
org.apache.jena.sparql.algebra.OpVisitor	getBeforeVisitor()
static Map<org.apache.jena.sparql.expr.Expr,VSpace>	toExprConstraints(CBinding crow)
org.apache.jena.sparql.algebra.Op	transform(org.apache.jena.sparql.algebra.op.OpBGP opBGP)
org.apache.jena.sparql.algebra.Op	transform(org.apache.jena.sparql.algebra.op.OpFilter opFilter, org.apache.jena.sparql.algebra.Op subOp)	Check for filter expressions of the form [str(?p) op 'string_literal'] and if ?p is known to be an IRI transform it to [?p op ]

Methods inherited from class org.aksw.jenax.sparql.algebra.walker.TrackingTransformCopy

path

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, transform

Methods inherited from class java.lang.Object

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

Field Details

beforeVisitor

protected TrackingTransformConditionalFunctionInversion.BeforeVisitor beforeVisitor

beforeConditions

protected Map<org.aksw.commons.path.core.Path<String>,Map<org.apache.jena.sparql.expr.Expr,VSpace>> beforeConditions

afterConditions

protected Map<org.aksw.commons.path.core.Path<String>,Map<org.apache.jena.sparql.expr.Expr,VSpace>> afterConditions

Constructor Details

TrackingTransformConditionalFunctionInversion

public TrackingTransformConditionalFunctionInversion(Tracker<CBinding> pathState)

Method Details

getBeforeVisitor

public org.apache.jena.sparql.algebra.OpVisitor getBeforeVisitor()

Overrides:

getBeforeVisitor in class TrackingTransformCopy<CBinding>

transform

public org.apache.jena.sparql.algebra.Op transform(org.apache.jena.sparql.algebra.op.OpBGP opBGP)

Specified by:

transform in interface org.apache.jena.sparql.algebra.Transform

Overrides:

transform in class org.apache.jena.sparql.algebra.TransformCopy

transform

public org.apache.jena.sparql.algebra.Op transform(org.apache.jena.sparql.algebra.op.OpFilter opFilter,
 org.apache.jena.sparql.algebra.Op subOp)

Check for filter expressions of the form [str(?p) op 'string_literal'] and if ?p is known to be an IRI transform it to [?p op ]

Specified by:

transform in interface org.apache.jena.sparql.algebra.Transform

Overrides:

transform in class org.apache.jena.sparql.algebra.TransformCopy

toExprConstraints

public static Map<org.apache.jena.sparql.expr.Expr,VSpace> toExprConstraints(CBinding crow)

applyInverseFunction

public static Map.Entry<org.apache.jena.sparql.expr.NodeValue,org.apache.jena.sparql.expr.Expr> applyInverseFunction(Map.Entry<org.apache.jena.sparql.expr.NodeValue,org.apache.jena.sparql.expr.Expr> e,
 Map<org.apache.jena.sparql.expr.Expr,VSpace> exprToValueSpace)