Class ApplyNormalizeGraphInnerPathsTransform
java.lang.Object
org.eclipse.rdf4j.queryrender.sparql.ir.util.transform.BaseTransform
org.eclipse.rdf4j.queryrender.sparql.ir.util.transform.ApplyNormalizeGraphInnerPathsTransform
Within GRAPH bodies, normalize local triple/path shapes by fusing adjacent PT/SP/PT patterns and performing
conservative tail joins. This helps later UNION/path fusers see a stable inner structure.
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Field Summary
Fields inherited from class BaseTransform
ANON_PATH_INVERSE_PREFIX, ANON_PATH_PREFIX -
Method Summary
Modifier and TypeMethodDescriptionstatic IrBGPapply(IrBGP bgp, TupleExprIRRenderer r) static IrBGPMethods 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, varOrValueModifier and TypeMethodDescriptionstatic IrBGPbgpWithLines(IrBGP original, List<IrNode> lines) Build a new IrBGP with the same scope flag and the provided lines.static booleanbranchHasAnonPathBridge(IrBGP branch) True if the given branch contains at least one variable with the parser-generated _anon_path_ (or inverse variant) prefix anywhere in its simple triple-like structures.static voidcopyAllExcept(IrBGP from, IrBGP to, IrNode except) static IrBGPFuse adjacent IrPathTriple nodes when the first's object equals the second's subject.static IrBGPstatic IrBGPFuse a path triple whose object is a bridge var with a constant-IRI tail triple that also uses the bridge var, producing a new path with an added '/^p' or '/p' segment.static IrBGPFuse a three-line sequence: IrPathTriple (A), IrStatementPattern (B), IrPathTriple (C) into A then ( ^B.p / C ).static StringinvertNegatedPropertySet(String npsText) If the given path text is a negated property set of the form !static Stringiri(Var pred, TupleExprIRRenderer r) Convenience: render a constant-IRI predicate Var to text.static booleanTrue when the anonymous path var explicitly encodes inverse orientation.static booleanisAnonPathVar(Var v) static booleanConvenience: true iff SP has a constant-IRI predicate.static IrBGPstatic StringmergeNpsMembers(String a, String b) Merge NPS members of two canonical strings '!static StringnormalizeCompactNps(String path) Normalize compact negated-property-set forms into the canonical parenthesized variant.static IrBGPRe-orient a bare negated property set path "!static IrNoderewriteContainers(IrNode n, Function<IrBGP, IrBGP> f) Utility: rewrite container nodes by applying a given function to their inner IrBGP children.static booleanstatic booleansameVarOrValue(Var a, Var b) True when both variables denote the same term: compares names if both are variables without value, or compares values if both are constants.static booleanTrue if all UNION branches contain at least one _anon_path_* variable (or inverse variant).static booleanNew-scope UNION safety: true iff the two UNION branches share at least one _anon_path_* variable name.static booleanTrue if all UNION branches share at least one common variable name that starts with the _anon_path_ prefix.static booleanUniversal safeguard for explicit user UNIONs: true iff the UNION is marked as new scope and all its branches are also marked as new scope.static StringvarOrValue(Var v, TupleExprIRRenderer r)
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Method Details
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apply
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fuseAdjacentPtThenSp
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