it.unibz.inf.ontop.iq.transformer.impl

Class RDFTypeDependentSimplifyingTransformer

java.lang.Object

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

it.unibz.inf.ontop.iq.transformer.impl.RDFTypeDependentSimplifyingTransformer

All Implemented Interfaces:

IQTreeTransformer, IQTreeVisitingTransformer

Direct Known Subclasses:

AggregationSimplifierImpl.AggregationSimplifyingTransformer, OrderBySimplifierImpl.OrderBySimplifyingTransformer

public abstract class RDFTypeDependentSimplifyingTransformer
extends DefaultRecursiveIQTreeVisitingTransformer

TODO: find a better name

Field Summary

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

iqFactory

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	RDFTypeDependentSimplifyingTransformer(OptimizationSingletons optimizationSingletons)

Method Summary

Modifier and Type	Method and Description
protected Optional<it.unibz.inf.ontop.com.google.common.collect.ImmutableSet<RDFTermType>>	extractPossibleTypes(ImmutableTerm rdfTypeTerm, IQTree childTree)
protected IQTree	pushDownDefinitions(IQTree initialChild, Stream<DefinitionPushDownRequest> definitionsToPushDown) Pushes down definitions emerging from the simplification of the order comparators
protected ImmutableTerm	unwrapIfElseNull(ImmutableTerm term)

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

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

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

RDFTypeDependentSimplifyingTransformer

protected RDFTypeDependentSimplifyingTransformer(OptimizationSingletons optimizationSingletons)

Method Detail

unwrapIfElseNull

protected ImmutableTerm unwrapIfElseNull(ImmutableTerm term)

extractPossibleTypes

protected Optional<it.unibz.inf.ontop.com.google.common.collect.ImmutableSet<RDFTermType>> extractPossibleTypes(ImmutableTerm rdfTypeTerm,
                                                                                                                IQTree childTree)

pushDownDefinitions

protected IQTree pushDownDefinitions(IQTree initialChild,
                                     Stream<DefinitionPushDownRequest> definitionsToPushDown)

Pushes down definitions emerging from the simplification of the order comparators