Class GroupUnionOfSameGraphBranchesTransform

java.lang.Object

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

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

public final class GroupUnionOfSameGraphBranchesTransform
extends BaseTransform

Rewrite a UNION whose multiple branches are each a single GRAPH block with the same graph reference into a single GRAPH whose body contains a UNION of the inner branch bodies. This preserves user-intended grouping like "GRAPH ?g { { A } UNION { B } }" instead of rendering as "{ GRAPH ?g { A } } UNION { GRAPH ?g { B } }". Safety: - Only rewrites when two or more UNION branches are single GRAPHs with identical graph refs. - Preserves branch order by collapsing the first encountered group into a single GRAPH and skipping subsequent branches belonging to the same group.

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)