Package org.aksw.jenax.graphql.sparql.v2.api2

Class ElementGeneratorLateral

java.lang.Object

org.aksw.jenax.graphql.sparql.v2.api2.ElementGeneratorLateral

public class ElementGeneratorLateral
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static final record	ElementGeneratorLateral.ElementMapping
static final record	ElementGeneratorLateral.ElementNodeVarMapping
static final record	ElementGeneratorLateral.SortNode

Constructor Summary

Constructors

Constructor	Description
ElementGeneratorLateral()

Method Summary

Modifier and Type	Method	Description
static org.apache.jena.sparql.syntax.Element	applySlice(org.apache.jena.sparql.syntax.Element elt, Long offset, Long limit)
static ElementGeneratorLateral.ElementNodeVarMapping	harmonizeVariables(ElementNode elementNode, String prefix)
static ElementNode	harmonizeVariables(ElementNode elementNode, List<String> parentPath, Map<org.apache.jena.sparql.core.Var,org.apache.jena.sparql.core.Var> parentRenames, Map<Object,Map<org.apache.jena.sparql.core.Var,org.apache.jena.sparql.core.Var>> outStateVarMap)	For each node, compute a variable mapping such that all elements can be safely combined into a single graph pattern.
static org.apache.jena.sparql.core.Var	resolveAncestorVar(ElementNode elementNode, Map<org.apache.jena.graph.Node,Map<org.apache.jena.sparql.core.Var,org.apache.jena.sparql.core.Var>> outStateVarMap, org.apache.jena.sparql.core.Var var)
static org.apache.jena.sparql.expr.Expr	resolveLocalVarsInExpr(ElementNode elementNode, Map<org.apache.jena.graph.Node,Map<org.apache.jena.sparql.core.Var,org.apache.jena.sparql.core.Var>> outStateVarMap, org.apache.jena.sparql.expr.Expr expr)
static Map<org.apache.jena.sparql.core.Var,org.apache.jena.sparql.core.Var>	resolveVarMap(ElementNode elementNode, Map<org.apache.jena.graph.Node,Map<org.apache.jena.sparql.core.Var,org.apache.jena.sparql.core.Var>> outStateVarMap, org.apache.jena.sparql.expr.Expr expr)
static org.apache.jena.sparql.syntax.Element	toLateral(boolean globalOrderBy, ElementNode node, List<String> parentPath, org.apache.jena.sparql.core.Var discriminatorVar, Map<org.apache.jena.graph.Node,Map<org.apache.jena.sparql.core.Var,org.apache.jena.sparql.core.Var>> outStateVarMap, Map<org.apache.jena.graph.Node,Map<org.apache.jena.sparql.core.Var,org.apache.jena.sparql.core.Var>> outStateOriginalToGlobalMap, List<org.apache.jena.sparql.core.Var> levelVars, List<Integer> parentPathIdx, ElementGeneratorLateral.SortNode thisSortNode)
static ElementGeneratorLateral.ElementMapping	toLateral(boolean globalOrderBy, ElementNode rootField, org.apache.jena.sparql.core.Var stateVar)

Methods inherited from class java.lang.Object

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

Constructor Details

ElementGeneratorLateral

public ElementGeneratorLateral()

Method Details

toLateral

public static ElementGeneratorLateral.ElementMapping toLateral(boolean globalOrderBy,
 ElementNode rootField,
 org.apache.jena.sparql.core.Var stateVar)

harmonizeVariables

public static ElementGeneratorLateral.ElementNodeVarMapping harmonizeVariables(ElementNode elementNode,
 String prefix)

harmonizeVariables

public static ElementNode harmonizeVariables(ElementNode elementNode,
 List<String> parentPath,
 Map<org.apache.jena.sparql.core.Var,org.apache.jena.sparql.core.Var> parentRenames,
 Map<Object,Map<org.apache.jena.sparql.core.Var,org.apache.jena.sparql.core.Var>> outStateVarMap)

For each node, compute a variable mapping such that all elements can be safely combined into a single graph pattern.

Parameters:

elementNode -

parentPath -

parentRenames -

outStateVarMap -

Returns:

resolveAncestorVar

public static org.apache.jena.sparql.core.Var resolveAncestorVar(ElementNode elementNode,
 Map<org.apache.jena.graph.Node,Map<org.apache.jena.sparql.core.Var,org.apache.jena.sparql.core.Var>> outStateVarMap,
 org.apache.jena.sparql.core.Var var)

resolveVarMap

public static Map<org.apache.jena.sparql.core.Var,org.apache.jena.sparql.core.Var> resolveVarMap(ElementNode elementNode,
 Map<org.apache.jena.graph.Node,Map<org.apache.jena.sparql.core.Var,org.apache.jena.sparql.core.Var>> outStateVarMap,
 org.apache.jena.sparql.expr.Expr expr)

resolveLocalVarsInExpr

public static org.apache.jena.sparql.expr.Expr resolveLocalVarsInExpr(ElementNode elementNode,
 Map<org.apache.jena.graph.Node,Map<org.apache.jena.sparql.core.Var,org.apache.jena.sparql.core.Var>> outStateVarMap,
 org.apache.jena.sparql.expr.Expr expr)

toLateral

public static org.apache.jena.sparql.syntax.Element toLateral(boolean globalOrderBy,
 ElementNode node,
 List<String> parentPath,
 org.apache.jena.sparql.core.Var discriminatorVar,
 Map<org.apache.jena.graph.Node,Map<org.apache.jena.sparql.core.Var,org.apache.jena.sparql.core.Var>> outStateVarMap,
 Map<org.apache.jena.graph.Node,Map<org.apache.jena.sparql.core.Var,org.apache.jena.sparql.core.Var>> outStateOriginalToGlobalMap,
 List<org.apache.jena.sparql.core.Var> levelVars,
 List<Integer> parentPathIdx,
 ElementGeneratorLateral.SortNode thisSortNode)

Parameters:

node -

parentPath -

parentRenames -

discriminatorVar -

outStateVarMap - For each state the mapping of the original var to the renamed var. The rationale is: Access to the original variable needs to be remapped to the renamed one.

Returns:

applySlice

public static org.apache.jena.sparql.syntax.Element applySlice(org.apache.jena.sparql.syntax.Element elt,
 Long offset,
 Long limit)