it.unibz.inf.ontop.model.term.functionsymbol.impl

Class SimpleUnarySPARQLFunctionSymbolImpl

java.lang.Object

it.unibz.inf.ontop.model.term.impl.PredicateImpl

it.unibz.inf.ontop.model.term.functionsymbol.impl.FunctionSymbolImpl

it.unibz.inf.ontop.model.term.functionsymbol.impl.SPARQLLikeFunctionSymbolImpl

it.unibz.inf.ontop.model.term.functionsymbol.impl.SPARQLFunctionSymbolImpl

it.unibz.inf.ontop.model.term.functionsymbol.impl.ReduciblePositiveAritySPARQLFunctionSymbolImpl

it.unibz.inf.ontop.model.term.functionsymbol.impl.SimpleUnarySPARQLFunctionSymbolImpl

All Implemented Interfaces:

FunctionSymbol, Predicate, SPARQLFunctionSymbol

public class SimpleUnarySPARQLFunctionSymbolImpl
extends ReduciblePositiveAritySPARQLFunctionSymbolImpl

Nested Class Summary

Nested classes/interfaces inherited from interface it.unibz.inf.ontop.model.term.functionsymbol.FunctionSymbol

FunctionSymbol.FunctionalTermNullability

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	SimpleUnarySPARQLFunctionSymbolImpl(String name, org.apache.commons.rdf.api.IRI functionIRI, RDFTermType inputType, RDFTermType targetType, boolean isAlwaysInjective, BiFunction<TermFactory,ImmutableTerm,ImmutableFunctionalTerm> dbFunctionalTermFct)
protected	SimpleUnarySPARQLFunctionSymbolImpl(String name, String officialName, RDFTermType inputType, RDFTermType targetType, boolean isAlwaysInjective, BiFunction<TermFactory,ImmutableTerm,ImmutableFunctionalTerm> dbFunctionalTermFct)

Method Summary

Modifier and Type	Method and Description
boolean	canBePostProcessed(com.google.common.collect.ImmutableList<? extends ImmutableTerm> arguments) 1.
protected ImmutableTerm	computeLexicalTerm(com.google.common.collect.ImmutableList<ImmutableTerm> subLexicalTerms, com.google.common.collect.ImmutableList<ImmutableTerm> typeTerms, TermFactory termFactory, ImmutableTerm returnedTypeTerm) Compute the lexical term when there is no input type error
protected ImmutableTerm	computeTypeTerm(com.google.common.collect.ImmutableList<? extends ImmutableTerm> subLexicalTerms, com.google.common.collect.ImmutableList<ImmutableTerm> typeTerms, TermFactory termFactory, VariableNullability variableNullability)
Optional<TermTypeInference>	inferType(com.google.common.collect.ImmutableList<? extends ImmutableTerm> terms) If the child type is xsd:string or a language tag, then returns it.
boolean	isAlwaysInjectiveInTheAbsenceOfNonInjectiveFunctionalTerms() When the function symbol is, in the absence of non-injective functional sub-terms, sometimes but not always injective, please override isInjective(...)

Methods inherited from class it.unibz.inf.ontop.model.term.functionsymbol.impl.ReduciblePositiveAritySPARQLFunctionSymbolImpl

buildTermAfterEvaluation, evaluateInputTypeError, tolerateNulls

Methods inherited from class it.unibz.inf.ontop.model.term.functionsymbol.impl.SPARQLFunctionSymbolImpl

getIRI, getOfficialName

Methods inherited from class it.unibz.inf.ontop.model.term.functionsymbol.impl.SPARQLLikeFunctionSymbolImpl

extractLexicalTerm, extractRDFTermTypeTerm, isRDFFunctionalTerm, mayReturnNullWithoutNullArguments

Methods inherited from class it.unibz.inf.ontop.model.term.functionsymbol.impl.FunctionSymbolImpl

analyzeInjectivity, canBeSafelyDecomposedIntoConjunction, decomposeInjectiveTopFunctionalTerm, enableIfElseNullLifting, evaluateIsNotNull, evaluateNullability, evaluateStrictEq, evaluateStrictEqWithFunctionalTerm, evaluateStrictEqWithNonNullConstant, getExpectedBaseType, getExpectedBaseTypes, isAggregation, isDeterministic, isInjective, isNullable, proposeProvenanceVariables, simplify, simplifyAsGuaranteedToBeNonNull, transformIntoRegularArguments, tryToLiftMagicNumbers

Methods inherited from class it.unibz.inf.ontop.model.term.impl.PredicateImpl

clone, equals, getArity, getName, hashCode, toString

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface it.unibz.inf.ontop.model.term.functionsymbol.FunctionSymbol

analyzeInjectivity, evaluateIsNotNull, evaluateNullability, evaluateStrictEq, getExpectedBaseType, isAggregation, isDeterministic, isNullable, proposeProvenanceVariables, simplify, simplifyAsGuaranteedToBeNonNull

Methods inherited from interface it.unibz.inf.ontop.model.term.functionsymbol.Predicate

getArity, getName

Constructor Detail

SimpleUnarySPARQLFunctionSymbolImpl

protected SimpleUnarySPARQLFunctionSymbolImpl(@Nonnull
                                              String name,
                                              org.apache.commons.rdf.api.IRI functionIRI,
                                              RDFTermType inputType,
                                              RDFTermType targetType,
                                              boolean isAlwaysInjective,
                                              BiFunction<TermFactory,ImmutableTerm,ImmutableFunctionalTerm> dbFunctionalTermFct)

SimpleUnarySPARQLFunctionSymbolImpl

protected SimpleUnarySPARQLFunctionSymbolImpl(@Nonnull
                                              String name,
                                              String officialName,
                                              RDFTermType inputType,
                                              RDFTermType targetType,
                                              boolean isAlwaysInjective,
                                              BiFunction<TermFactory,ImmutableTerm,ImmutableFunctionalTerm> dbFunctionalTermFct)

Method Detail

inferType

public Optional<TermTypeInference> inferType(com.google.common.collect.ImmutableList<? extends ImmutableTerm> terms)

If the child type is xsd:string or a language tag, then returns it.

canBePostProcessed

public boolean canBePostProcessed(com.google.common.collect.ImmutableList<? extends ImmutableTerm> arguments)

Description copied from interface: FunctionSymbol

1. When a functional term simplifies itself in a BOTTOM-UP manner: Returns true if is guaranteed to "simplify itself" as a Constant when receiving Constants as arguments (outside the optimization phase) . 2. When a functional term simplifies itself in a TOP-DOWN manner (e.g. IF-THEN-ELSE functional terms): The permission for post-processing may depend on the ability of sub-functional terms to be post-processed or safely evaluated by the DB engine. (Recall that top-down evaluation allows some arguments not to be evaluated when their pre-conditions are not met. This is particularly valuable for preventing fatal errors).

computeLexicalTerm

protected ImmutableTerm computeLexicalTerm(com.google.common.collect.ImmutableList<ImmutableTerm> subLexicalTerms,
                                           com.google.common.collect.ImmutableList<ImmutableTerm> typeTerms,
                                           TermFactory termFactory,
                                           ImmutableTerm returnedTypeTerm)

Description copied from class: ReduciblePositiveAritySPARQLFunctionSymbolImpl

Compute the lexical term when there is no input type error

Specified by:

computeLexicalTerm in class ReduciblePositiveAritySPARQLFunctionSymbolImpl

computeTypeTerm

protected ImmutableTerm computeTypeTerm(com.google.common.collect.ImmutableList<? extends ImmutableTerm> subLexicalTerms,
                                        com.google.common.collect.ImmutableList<ImmutableTerm> typeTerms,
                                        TermFactory termFactory,
                                        VariableNullability variableNullability)

Specified by:

computeTypeTerm in class ReduciblePositiveAritySPARQLFunctionSymbolImpl

isAlwaysInjectiveInTheAbsenceOfNonInjectiveFunctionalTerms

public boolean isAlwaysInjectiveInTheAbsenceOfNonInjectiveFunctionalTerms()

Description copied from class: FunctionSymbolImpl

When the function symbol is, in the absence of non-injective functional sub-terms, sometimes but not always injective, please override isInjective(...)

Specified by:

isAlwaysInjectiveInTheAbsenceOfNonInjectiveFunctionalTerms in class FunctionSymbolImpl