Package org.aksw.jena_sparql_api.transform

Class ElementTransformVirtualPredicates

java.lang.Object

org.apache.jena.sparql.syntax.syntaxtransform.ElementTransformCopyBase

org.aksw.jena_sparql_api.transform.ElementTransformVirtualPredicates

All Implemented Interfaces:

ElementTransform

public class ElementTransformVirtualPredicates
extends ElementTransformCopyBase

Virtual properties map to SPARQL binary relations ?s ?o | arbitrarySparqlElementMentioningSAndO Triple pattern: ?s ?p ?o are replaced by a union of all virtual properties -> { ?s ?p ?o } Union { Select ( As ?p) { arbitrarySparqlElementMentioningSAndO } If ?p is a constant, we can directly replace it with the virtual property

Author:

raven

Field Summary

Fields

Modifier and Type	Field	Description
protected org.aksw.commons.collections.generator.Generator<org.apache.jena.sparql.core.Var>	varGen
protected Map<org.apache.jena.graph.Node,Fragment2>	virtualPredicates

Fields inherited from class org.apache.jena.sparql.syntax.syntaxtransform.ElementTransformCopyBase

alwaysCopy

Constructor Summary

Constructors

Constructor	Description
ElementTransformVirtualPredicates()
ElementTransformVirtualPredicates(Map<org.apache.jena.graph.Node,Fragment2> virtualPredicates)
ElementTransformVirtualPredicates(Map<org.apache.jena.graph.Node,Fragment2> virtualPredicates, org.aksw.commons.collections.generator.Generator<org.apache.jena.sparql.core.Var> varGen)

Method Summary

Modifier and Type	Method	Description
static org.apache.jena.sparql.syntax.Element	applyTransform(org.apache.jena.graph.Triple triple, Map<org.apache.jena.graph.Node,Fragment2> virtualPredicates, org.aksw.commons.collections.generator.Generator<org.apache.jena.sparql.core.Var> varGen)	Returns null if no transformation needed to be applied
static org.apache.jena.sparql.syntax.Element	applyTransform(org.apache.jena.sparql.syntax.ElementPathBlock el, Map<org.apache.jena.graph.Node,Fragment2> virtualPredicates, org.aksw.commons.collections.generator.Generator<org.apache.jena.sparql.core.Var> rootVarGen)
static org.apache.jena.sparql.syntax.Element	applyTransform(org.apache.jena.sparql.syntax.ElementTriplesBlock el, Map<org.apache.jena.graph.Node,Fragment2> virtualPredicates, org.aksw.commons.collections.generator.Generator<org.apache.jena.sparql.core.Var> rootVarGen)
static org.apache.jena.sparql.syntax.Element	createElementForConcretePredicate(org.apache.jena.sparql.core.Var pVar, org.apache.jena.graph.Node pRef, org.apache.jena.graph.Node s, org.apache.jena.graph.Node o, Fragment2 relation, org.aksw.commons.collections.generator.Generator<org.apache.jena.sparql.core.Var> varGen)
static org.apache.jena.sparql.syntax.Element	createElementForVariablePredicate(org.apache.jena.sparql.core.Var pVar, org.apache.jena.graph.Node s, org.apache.jena.graph.Node o, Map<org.apache.jena.graph.Node,Fragment2> virtualPredicates, org.aksw.commons.collections.generator.Generator<org.apache.jena.sparql.core.Var> varGen)
static org.apache.jena.query.Query	transform(org.apache.jena.query.Query query, Map<org.apache.jena.graph.Node,Fragment2> virtualPredicates, boolean cloneOnChange)
org.apache.jena.sparql.syntax.Element	transform(org.apache.jena.sparql.syntax.ElementPathBlock el)
static org.apache.jena.sparql.syntax.Element	transform(org.apache.jena.sparql.syntax.Element element, Map<org.apache.jena.graph.Node,Fragment2> virtualPredicates)
org.apache.jena.sparql.syntax.Element	transform(org.apache.jena.sparql.syntax.ElementTriplesBlock el)

Methods inherited from class org.apache.jena.sparql.syntax.syntaxtransform.ElementTransformCopyBase

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

virtualPredicates

protected Map<org.apache.jena.graph.Node,Fragment2> virtualPredicates

varGen

protected org.aksw.commons.collections.generator.Generator<org.apache.jena.sparql.core.Var> varGen

Constructor Details

ElementTransformVirtualPredicates

public ElementTransformVirtualPredicates()

ElementTransformVirtualPredicates

public ElementTransformVirtualPredicates(Map<org.apache.jena.graph.Node,Fragment2> virtualPredicates)

ElementTransformVirtualPredicates

public ElementTransformVirtualPredicates(Map<org.apache.jena.graph.Node,Fragment2> virtualPredicates,
 org.aksw.commons.collections.generator.Generator<org.apache.jena.sparql.core.Var> varGen)

Method Details

transform

public org.apache.jena.sparql.syntax.Element transform(org.apache.jena.sparql.syntax.ElementTriplesBlock el)

Specified by:

transform in interface ElementTransform

Overrides:

transform in class ElementTransformCopyBase

transform

public org.apache.jena.sparql.syntax.Element transform(org.apache.jena.sparql.syntax.ElementPathBlock el)

Specified by:

transform in interface ElementTransform

Overrides:

transform in class ElementTransformCopyBase

applyTransform

public static org.apache.jena.sparql.syntax.Element applyTransform(org.apache.jena.sparql.syntax.ElementTriplesBlock el,
 Map<org.apache.jena.graph.Node,Fragment2> virtualPredicates,
 org.aksw.commons.collections.generator.Generator<org.apache.jena.sparql.core.Var> rootVarGen)

applyTransform

public static org.apache.jena.sparql.syntax.Element applyTransform(org.apache.jena.sparql.syntax.ElementPathBlock el,
 Map<org.apache.jena.graph.Node,Fragment2> virtualPredicates,
 org.aksw.commons.collections.generator.Generator<org.apache.jena.sparql.core.Var> rootVarGen)

applyTransform

public static org.apache.jena.sparql.syntax.Element applyTransform(org.apache.jena.graph.Triple triple,
 Map<org.apache.jena.graph.Node,Fragment2> virtualPredicates,
 org.aksw.commons.collections.generator.Generator<org.apache.jena.sparql.core.Var> varGen)

Returns null if no transformation needed to be applied

Parameters:

triple -

virtualPredicates -

varGen -

Returns:

createElementForVariablePredicate

public static org.apache.jena.sparql.syntax.Element createElementForVariablePredicate(org.apache.jena.sparql.core.Var pVar,
 org.apache.jena.graph.Node s,
 org.apache.jena.graph.Node o,
 Map<org.apache.jena.graph.Node,Fragment2> virtualPredicates,
 org.aksw.commons.collections.generator.Generator<org.apache.jena.sparql.core.Var> varGen)

createElementForConcretePredicate

public static org.apache.jena.sparql.syntax.Element createElementForConcretePredicate(org.apache.jena.sparql.core.Var pVar,
 org.apache.jena.graph.Node pRef,
 org.apache.jena.graph.Node s,
 org.apache.jena.graph.Node o,
 Fragment2 relation,
 org.aksw.commons.collections.generator.Generator<org.apache.jena.sparql.core.Var> varGen)

Parameters:

p - a concrete predicate

s -

o -

virtualPredicates -

transform

public static org.apache.jena.query.Query transform(org.apache.jena.query.Query query,
 Map<org.apache.jena.graph.Node,Fragment2> virtualPredicates,
 boolean cloneOnChange)

transform

public static org.apache.jena.sparql.syntax.Element transform(org.apache.jena.sparql.syntax.Element element,
 Map<org.apache.jena.graph.Node,Fragment2> virtualPredicates)