Package org.aksw.facete.v4.impl

Class ElementGeneratorWorker

java.lang.Object

org.aksw.facete.v4.impl.ElementGeneratorWorker

public class ElementGeneratorWorker
extends Object

Create individual elements for a facet paths. The class ElementGenerator can generate "high level" queries and uses this class as a worker to carry out specific sub tasks.

Field Summary

Fields

Modifier and Type	Field	Description
protected FacetPathMapping	pathMapping
protected PropertyResolver	propertyResolver
protected Map<VarScope,ElementGeneratorContext>	scopeToContext

Constructor Summary

Constructors

Constructor	Description
ElementGeneratorWorker(TreeData<ScopedFacetPath> facetTree, com.google.common.collect.SetMultimap<ScopedFacetPath,org.apache.jena.sparql.expr.Expr> constraintIndex, FacetPathMapping pathMapping, PropertyResolver propertyResolver)
ElementGeneratorWorker(FacetPathMapping pathMapping, PropertyResolver propertyResolver)

Method Summary

Modifier and Type	Method	Description
void	accumulateElements(ElementGeneratorContext cxt, org.apache.jena.sparql.syntax.ElementGroup globalAcc, org.apache.jena.sparql.core.Var parentVar, org.aksw.jenax.path.core.FacetPath path, Function<org.aksw.jenax.path.core.FacetPath,? extends Iterable<org.aksw.jenax.path.core.FacetPath>> getChildren)	TODO 'global' here means global to the current the sub-tree
org.apache.jena.sparql.core.Var	allocateElement(ElementGeneratorContext cxt, org.aksw.jenax.path.core.FacetPath path)
org.apache.jena.sparql.core.Var	allocateElement(ScopedFacetPath path)
void	allocateElements(org.apache.jena.sparql.expr.Expr expr)
ElementAcc	allocateEltAcc(ElementGeneratorContext cxt, org.apache.jena.sparql.core.Var parentVar, org.apache.jena.sparql.core.Var targetVar, org.aksw.jenax.path.core.FacetPath path)
ElementAcc	allocateEltAcc(org.apache.jena.sparql.core.Var parentVar, org.apache.jena.sparql.core.Var targetVar, ScopedFacetPath scopedPath)	Create the element for the last facet step of a facet path (without recursion)
void	analysePathModality(org.apache.jena.sparql.expr.Expr expr)	Checks for whether this expression references any paths that need to be mandatory.
static org.apache.jena.sparql.syntax.Element	collect(TreeDataMap<org.aksw.jenax.path.core.FacetPath,ElementAcc> tree, org.aksw.jenax.path.core.FacetPath currentPath)	Create an Element for the sub-tree of that starts at a given path at the given tree.
MappedElement	createElement()
MappedElement	createElement(ElementGeneratorContext cxt, org.apache.jena.sparql.syntax.ElementGroup filterGroup)
org.apache.jena.sparql.syntax.Element	createElementForLastStep(ElementGeneratorContext cxt, org.apache.jena.sparql.core.Var parentVar, org.apache.jena.sparql.core.Var targetVar, org.aksw.jenax.path.core.FacetPath path)
void	createElementsForExprs(Collection<org.apache.jena.sparql.expr.Expr> baseExprs, boolean negate)
void	createElementsForExprs2(ElementGeneratorContext cxt, org.apache.jena.sparql.syntax.ElementGroup globalAcc, Collection<org.apache.jena.sparql.expr.Expr> baseExprs, boolean negate)
void	declareMandatoryPath(ElementGeneratorContext cxt, org.aksw.jenax.path.core.FacetPath path)
void	declareMandatoryPath(ScopedFacetPath scopedPath)	Mark a path as mandatory.
ElementGeneratorContext	getOrCreateContext(VarScope scope)
FacetPathMapping	getPathMapping()
com.google.common.collect.BiMap<ScopedFacetPath,org.apache.jena.sparql.core.Var>	getPathToVar()
PropertyResolver	getPropertyResolver()
org.apache.jena.sparql.core.Var	resolve(ScopedFacetPath sfp)
void	setConstraintIndex(com.google.common.collect.SetMultimap<ScopedFacetPath,org.apache.jena.sparql.expr.Expr> constraintIndex)
void	setFacetTree(TreeData<ScopedFacetPath> facetTree)

Methods inherited from class java.lang.Object

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

Field Details

scopeToContext

protected Map<VarScope,ElementGeneratorContext> scopeToContext

pathMapping

protected FacetPathMapping pathMapping

propertyResolver

protected PropertyResolver propertyResolver

Constructor Details

ElementGeneratorWorker

public ElementGeneratorWorker(FacetPathMapping pathMapping,
 PropertyResolver propertyResolver)

ElementGeneratorWorker

public ElementGeneratorWorker(TreeData<ScopedFacetPath> facetTree,
 com.google.common.collect.SetMultimap<ScopedFacetPath,org.apache.jena.sparql.expr.Expr> constraintIndex,
 FacetPathMapping pathMapping,
 PropertyResolver propertyResolver)

Method Details

setConstraintIndex

public void setConstraintIndex(com.google.common.collect.SetMultimap<ScopedFacetPath,org.apache.jena.sparql.expr.Expr> constraintIndex)

setFacetTree

public void setFacetTree(TreeData<ScopedFacetPath> facetTree)

getPathMapping

public FacetPathMapping getPathMapping()

getPropertyResolver

public PropertyResolver getPropertyResolver()

getPathToVar

public com.google.common.collect.BiMap<ScopedFacetPath,org.apache.jena.sparql.core.Var> getPathToVar()

analysePathModality

public void analysePathModality(org.apache.jena.sparql.expr.Expr expr)

Checks for whether this expression references any paths that need to be mandatory. Elements created for the segments along such a path will not be wrapped in OPTIONAL blocks.

declareMandatoryPath

public void declareMandatoryPath(ScopedFacetPath scopedPath)

Mark a path as mandatory. This makes all parents also mandatory.

getOrCreateContext

public ElementGeneratorContext getOrCreateContext(VarScope scope)

declareMandatoryPath

public void declareMandatoryPath(ElementGeneratorContext cxt,
 org.aksw.jenax.path.core.FacetPath path)

allocateEltAcc

public ElementAcc allocateEltAcc(org.apache.jena.sparql.core.Var parentVar,
 org.apache.jena.sparql.core.Var targetVar,
 ScopedFacetPath scopedPath)

Create the element for the last facet step of a facet path (without recursion)

allocateEltAcc

public ElementAcc allocateEltAcc(ElementGeneratorContext cxt,
 org.apache.jena.sparql.core.Var parentVar,
 org.apache.jena.sparql.core.Var targetVar,
 org.aksw.jenax.path.core.FacetPath path)

createElementForLastStep

public org.apache.jena.sparql.syntax.Element createElementForLastStep(ElementGeneratorContext cxt,
 org.apache.jena.sparql.core.Var parentVar,
 org.apache.jena.sparql.core.Var targetVar,
 org.aksw.jenax.path.core.FacetPath path)

allocateElements

public void allocateElements(org.apache.jena.sparql.expr.Expr expr)

allocateElement

public org.apache.jena.sparql.core.Var allocateElement(ScopedFacetPath path)

allocateElement

public org.apache.jena.sparql.core.Var allocateElement(ElementGeneratorContext cxt,
 org.aksw.jenax.path.core.FacetPath path)

accumulateElements

public void accumulateElements(ElementGeneratorContext cxt,
 org.apache.jena.sparql.syntax.ElementGroup globalAcc,
 org.apache.jena.sparql.core.Var parentVar,
 org.aksw.jenax.path.core.FacetPath path,
 Function<org.aksw.jenax.path.core.FacetPath,? extends Iterable<org.aksw.jenax.path.core.FacetPath>> getChildren)

TODO 'global' here means global to the current the sub-tree

Parameters:

parentAcc - Container to add elements to the parent

globalAcc - Container to add 'global' elements, such as filter expressions

parentVar -

path -

getChildren -

createElement

public MappedElement createElement()

createElement

public MappedElement createElement(ElementGeneratorContext cxt,
 org.apache.jena.sparql.syntax.ElementGroup filterGroup)

createElementsForExprs2

public void createElementsForExprs2(ElementGeneratorContext cxt,
 org.apache.jena.sparql.syntax.ElementGroup globalAcc,
 Collection<org.apache.jena.sparql.expr.Expr> baseExprs,
 boolean negate)

resolve

public org.apache.jena.sparql.core.Var resolve(ScopedFacetPath sfp)

createElementsForExprs

public void createElementsForExprs(Collection<org.apache.jena.sparql.expr.Expr> baseExprs,
 boolean negate)

collect

public static org.apache.jena.sparql.syntax.Element collect(TreeDataMap<org.aksw.jenax.path.core.FacetPath,ElementAcc> tree,
 org.aksw.jenax.path.core.FacetPath currentPath)

Create an Element for the sub-tree of that starts at a given path at the given tree.