Class ApplyCollectionsTransform

java.lang.Object

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

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

public final class ApplyCollectionsTransform
extends BaseTransform

Recognize RDF collection encodings (rdf:first/rdf:rest/... rdf:nil) headed by an anonymous collection variable and rewrite them to SPARQL collection syntax in text, e.g., ?s ex:list (1 2 3). Details: - Scans the WHERE lines for contiguous rdf:first/rdf:rest chains and records the textual value sequence. - Exposes overrides via the renderer so that the head variable prints as the compact "(item1 item2 ...)" form. - Removes the consumed rdf:first/rest triples from the IR; recursion preserves container structure.

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)

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)