it.unibz.inf.ontop.iq.optimizer.impl

Class OrderBySimplifierImpl.OrderBySimplifyingTransformer

java.lang.Object

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

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

it.unibz.inf.ontop.iq.optimizer.impl.OrderBySimplifierImpl.OrderBySimplifyingTransformer

All Implemented Interfaces:

IQTreeTransformer, IQTreeVisitingTransformer

Enclosing class:

OrderBySimplifierImpl

protected static class OrderBySimplifierImpl.OrderBySimplifyingTransformer
extends RDFTypeDependentSimplifyingTransformer

Field Summary

Fields

Modifier and Type	Field and Description
protected it.unibz.inf.ontop.com.google.common.collect.ImmutableSet<RDFDatatype>	nonLexicallyOrderedDatatypes
protected TermFactory	termFactory
protected TypeFactory	typeFactory
protected VariableGenerator	variableGenerator

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

iqFactory

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	OrderBySimplifyingTransformer(VariableGenerator variableGenerator, OptimizationSingletons optimizationSingletons)

Method Summary

Modifier and Type	Method and Description
protected NonGroundTerm	computeDBTerm(ImmutableTerm lexicalTerm, RDFTermType rdfType, IQTree childTree)
protected Stream<OrderBySimplifierImpl.ComparatorSimplification>	simplifyComparator(OrderByNode.OrderComparator comparator, IQTree child)
protected Stream<OrderBySimplifierImpl.ComparatorSimplification>	simplifyRDFTerm(ImmutableTerm lexicalTerm, ImmutableTerm rdfTypeTerm, IQTree childTree, boolean isAscending)
IQTree	transformOrderBy(IQTree tree, OrderByNode rootNode, IQTree child)

Methods inherited from class it.unibz.inf.ontop.iq.transformer.impl.RDFTypeDependentSimplifyingTransformer

extractPossibleTypes, pushDownDefinitions, unwrapIfElseNull

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, 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

Field Detail

variableGenerator

protected final VariableGenerator variableGenerator

termFactory

protected final TermFactory termFactory

typeFactory

protected final TypeFactory typeFactory

nonLexicallyOrderedDatatypes

protected final it.unibz.inf.ontop.com.google.common.collect.ImmutableSet<RDFDatatype> nonLexicallyOrderedDatatypes

Constructor Detail

OrderBySimplifyingTransformer

protected OrderBySimplifyingTransformer(VariableGenerator variableGenerator,
                                        OptimizationSingletons optimizationSingletons)

Method Detail

transformOrderBy

public IQTree transformOrderBy(IQTree tree,
                               OrderByNode rootNode,
                               IQTree child)

Specified by:

transformOrderBy in interface IQTreeVisitingTransformer

Overrides:

transformOrderBy in class DefaultRecursiveIQTreeVisitingTransformer

simplifyComparator

protected Stream<OrderBySimplifierImpl.ComparatorSimplification> simplifyComparator(OrderByNode.OrderComparator comparator,
                                                                                    IQTree child)

simplifyRDFTerm

protected Stream<OrderBySimplifierImpl.ComparatorSimplification> simplifyRDFTerm(ImmutableTerm lexicalTerm,
                                                                                 ImmutableTerm rdfTypeTerm,
                                                                                 IQTree childTree,
                                                                                 boolean isAscending)

computeDBTerm

protected NonGroundTerm computeDBTerm(ImmutableTerm lexicalTerm,
                                      RDFTermType rdfType,
                                      IQTree childTree)