Class ApplyNegatedPropertySetTransform

java.lang.Object

org.eclipse.rdf4j.queryrender.sparql.ir.util.transform.BaseTransform

org.eclipse.rdf4j.queryrender.sparql.ir.util.transform.ApplyNegatedPropertySetTransform

public final class ApplyNegatedPropertySetTransform
extends BaseTransform

Form negated property sets (NPS) from simple shapes involving a predicate variable constrained by NOT IN or a chain of != filters, optionally followed by a constant-predicate tail step that is fused. Also contains GRAPH-aware variants so that common IR orders like GRAPH, FILTER, GRAPH can be handled. Safety: - Requires the filtered predicate variable to be a parser-generated _anon_path_* var. - Only fuses constant-predicate tails; complex tails are left to later passes.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static final class	ApplyNegatedPropertySetTransform.MatchTriple
static final class	ApplyNegatedPropertySetTransform.NsText

Field Summary

Fields inherited from class BaseTransform

ANON_PATH_INVERSE_PREFIX, ANON_PATH_PREFIX

Method Summary

Modifier and Type	Method	Description
static IrBGP	apply(IrBGP bgp, TupleExprIRRenderer r)
static ApplyNegatedPropertySetTransform.MatchTriple	findTripleWithConstPredicateReusingObject(IrBGP w, Var obj)
static ApplyNegatedPropertySetTransform.MatchTriple	findTripleWithPredicateVar(IrBGP w, String varName)
static String	joinIrisWithPreferredOrder(List<String> tokens, TupleExprIRRenderer r)
static ApplyNegatedPropertySetTransform.NsText	parseNegatedSetText(String condText)	Parse either "?
static IrBGP	rewriteSimpleNpsOnly(IrBGP bgp, TupleExprIRRenderer r)

Methods inherited from class BaseTransform

bgpWithLines, branchHasAnonPathBridge, copyAllExcept, fuseAdjacentPtThenPt, fuseAdjacentSpThenPt, fuseAltInverseTailBGP, fusePtSpPtSequence, invertNegatedPropertySet, iri, isAnonPathInverseVar, isAnonPathVar, isConstantIriPredicate, joinPathWithLaterSp, mergeNpsMembers, normalizeCompactNps, orientBareNpsForNext, rewriteContainers, sameVar, sameVarOrValue, unionBranchesAllHaveAnonPathBridge, unionBranchesShareAnonPathVarWithAllowedRoleMapping, unionBranchesShareCommonAnonPathVarName, unionIsExplicitAndAllBranchesScoped, varOrValue

Methods inherited from class Object

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

Method Details

apply

public static IrBGP apply(IrBGP bgp,
 TupleExprIRRenderer r)

rewriteSimpleNpsOnly

public static IrBGP rewriteSimpleNpsOnly(IrBGP bgp,
 TupleExprIRRenderer r)

parseNegatedSetText

public static ApplyNegatedPropertySetTransform.NsText parseNegatedSetText(String condText)

Parse either "?p NOT IN (a, b, ...)" or a conjunction of inequalities into a negated property set.

findTripleWithConstPredicateReusingObject

public static ApplyNegatedPropertySetTransform.MatchTriple findTripleWithConstPredicateReusingObject(IrBGP w,
 Var obj)

findTripleWithPredicateVar

public static ApplyNegatedPropertySetTransform.MatchTriple findTripleWithPredicateVar(IrBGP w,
 String varName)

joinIrisWithPreferredOrder

public static String joinIrisWithPreferredOrder(List<String> tokens,
 TupleExprIRRenderer r)