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

Class AbstractDBNonStrictEqOperator

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.BooleanFunctionSymbolImpl

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

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

All Implemented Interfaces:

BooleanFunctionSymbol, DBBooleanFunctionSymbol, DBFunctionSymbol, DBFunctionSymbolSerializer, FunctionSymbol, Predicate

Direct Known Subclasses:

DefaultDBNonStrictDateEqOperator, DefaultDBNonStrictDatetimeEqOperator, DefaultDBNonStrictDefaultEqOperator, DefaultDBNonStrictNumericEqOperator, DefaultDBNonStrictStringEqOperator

public abstract class AbstractDBNonStrictEqOperator
extends DBBooleanFunctionSymbolImpl

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	AbstractDBNonStrictEqOperator(String functionSymbolName, DBTermType rootDBTermType, DBTermType dbBoolean)

Method Summary

Modifier and Type	Method and Description
boolean	blocksNegation() TODO: stop blocking
String	getNativeDBString(com.google.common.collect.ImmutableList<? extends ImmutableTerm> terms, Function<ImmutableTerm,String> termConverter, TermFactory termFactory) Can be overridden
boolean	isAlwaysInjectiveInTheAbsenceOfNonInjectiveFunctionalTerms() When the function symbol is, in the absence of non-injective functional sub-terms, sometimes but not always injective, please override isInjective(...)
ImmutableExpression	negate(com.google.common.collect.ImmutableList<? extends ImmutableTerm> subTerms, TermFactory termFactory) Usually NOT supported when the function symbol blocks negation.
protected boolean	tolerateNulls() Returns true if is not guaranteed to return NULL when one argument is NULL.

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

inBrackets, isPreferringToBePostProcessedOverBeingBlocked, mayReturnNullWithoutNullArguments

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

buildTermAfterEvaluation, enableIfElseNullLifting, inferType, tryToLiftIfThenTerm, tryToLiftMagicNumbers

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

analyzeInjectivity, canBeSafelyDecomposedIntoConjunction, decomposeInjectiveTopFunctionalTerm, 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

equals, getArity, getName, hashCode, toString

Methods inherited from class java.lang.Object

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

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

simplify2VL

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

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

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

getArity, getName

Constructor Detail

AbstractDBNonStrictEqOperator

protected AbstractDBNonStrictEqOperator(String functionSymbolName,
                                        DBTermType rootDBTermType,
                                        DBTermType dbBoolean)

Method Detail

getNativeDBString

public String getNativeDBString(com.google.common.collect.ImmutableList<? extends ImmutableTerm> terms,
                                Function<ImmutableTerm,String> termConverter,
                                TermFactory termFactory)

Can be overridden

tolerateNulls

protected boolean tolerateNulls()

Description copied from class: FunctionSymbolImpl

Returns true if is not guaranteed to return NULL when one argument is NULL. Can be the case for some function symbols that are rejecting certain cases and therefore refuse to simplify themselves, e.g. RDF(NULL,IRI) is invalid and therefore cannot be simplified.

Specified by:

tolerateNulls in class FunctionSymbolImpl

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

blocksNegation

public boolean blocksNegation()

TODO: stop blocking

negate

public ImmutableExpression negate(com.google.common.collect.ImmutableList<? extends ImmutableTerm> subTerms,
                                  TermFactory termFactory)

Description copied from interface: BooleanFunctionSymbol

Usually NOT supported when the function symbol blocks negation. Please use ImmutableExpression.negate() instead.