Package it.unibz.inf.ontop.generation.normalization.impl

Class ReplaceProvenanceConstantByNonGroundTermNormalizer

java.lang.Object

it.unibz.inf.ontop.iq.transform.impl.DefaultRecursiveIQTreeVisitingTransformer

it.unibz.inf.ontop.generation.normalization.impl.ReplaceProvenanceConstantByNonGroundTermNormalizer

All Implemented Interfaces:

DialectExtraNormalizer, IQTreeTransformer, IQTreeVisitingTransformer

public class ReplaceProvenanceConstantByNonGroundTermNormalizer
extends DefaultRecursiveIQTreeVisitingTransformer
implements DialectExtraNormalizer

Prevents a bug observed with MySQL 5.7.15, where the provenance special constant was misused (causing a MINUS encoded with a LJ and filter is null not to work)

Field Summary

Fields inherited from class it.unibz.inf.ontop.iq.transform.impl.DefaultRecursiveIQTreeVisitingTransformer

iqFactory

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	ReplaceProvenanceConstantByNonGroundTermNormalizer(IntermediateQueryFactory iqFactory, TermFactory termFactory, SubstitutionFactory substitutionFactory)

Method Summary

Modifier and Type	Method	Description
IQTree	transform(IQTree tree, VariableGenerator variableGenerator)
IQTree	transformLeftJoin(IQTree tree, LeftJoinNode rootNode, IQTree leftChild, IQTree rightChild)

Methods inherited from class it.unibz.inf.ontop.iq.transform.impl.DefaultRecursiveIQTreeVisitingTransformer

transformAggregation, transformBinaryNonCommutativeNode, transformConstruction, transformDistinct, transformEmpty, transformExtensionalData, transformFilter, transformInnerJoin, transformIntensionalData, transformLeaf, transformNaryCommutativeNode, transformNonStandardBinaryNonCommutativeNode, transformNonStandardLeafNode, transformNonStandardNaryNode, transformNonStandardUnaryNode, transformOrderBy, transformSlice, transformTrue, transformUnaryNode, transformUnion, transformValues

Methods inherited from class java.lang.Object

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

Methods inherited from interface it.unibz.inf.ontop.iq.transform.IQTreeVisitingTransformer

transform

Constructor Detail

ReplaceProvenanceConstantByNonGroundTermNormalizer

@Inject
protected ReplaceProvenanceConstantByNonGroundTermNormalizer(IntermediateQueryFactory iqFactory,
                                                             TermFactory termFactory,
                                                             SubstitutionFactory substitutionFactory)

Method Detail

transform

public IQTree transform(IQTree tree,
                        VariableGenerator variableGenerator)

Specified by:

transform in interface DialectExtraNormalizer

transformLeftJoin

public IQTree transformLeftJoin(IQTree tree,
                                LeftJoinNode rootNode,
                                IQTree leftChild,
                                IQTree rightChild)

Specified by:

transformLeftJoin in interface IQTreeVisitingTransformer

Overrides:

transformLeftJoin in class DefaultRecursiveIQTreeVisitingTransformer