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

Class DefaultBooleanNormFunctionSymbol

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.db.impl.AbstractTypedDBFunctionSymbol

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

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

All Implemented Interfaces:

DBFunctionSymbol, DBFunctionSymbolSerializer, DBTypeConversionFunctionSymbol, FunctionSymbol, Predicate

Direct Known Subclasses:

OneDigitBooleanNormFunctionSymbolImpl, OneLetterBooleanNormFunctionSymbolImpl

public class DefaultBooleanNormFunctionSymbol
extends AbstractDBTypeConversionFunctionSymbolImpl

Nested Class Summary

Nested classes/interfaces inherited from class it.unibz.inf.ontop.model.term.functionsymbol.db.impl.AbstractDBTypeConversionFunctionSymbolImpl

AbstractDBTypeConversionFunctionSymbolImpl.DBTypeConversionException

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

FunctionSymbol.FunctionalTermNullability

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	DefaultBooleanNormFunctionSymbol(DBTermType booleanType, DBTermType stringType)

Method Summary

Modifier and Type	Method and Description
boolean	canBePostProcessed(com.google.common.collect.ImmutableList<? extends ImmutableTerm> arguments) 1.
protected DBConstant	convertDBConstant(DBConstant constant, TermFactory termFactory)
Optional<DBTermType>	getInputType()
String	getNativeDBString(com.google.common.collect.ImmutableList<? extends ImmutableTerm> terms, Function<ImmutableTerm,String> termConverter, TermFactory termFactory) Returns a String in the native query language.
boolean	isAlwaysInjectiveInTheAbsenceOfNonInjectiveFunctionalTerms() Here we assume that the DB has only one way to represent the boolean value as a string
boolean	isSimple() Returns true if does not transform the string representation of the value (i.e.
boolean	isTemporary()
protected ImmutableFunctionalTerm	transformIntoDBCase(ImmutableTerm subTerm, TermFactory termFactory)

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

buildTermAfterEvaluation, buildTermFromFunctionalTerm

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

getTargetType, inferType, isPreferringToBePostProcessedOverBeingBlocked, mayReturnNullWithoutNullArguments, tolerateNulls

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.db.DBTypeConversionFunctionSymbol

getTargetType

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

isPreferringToBePostProcessedOverBeingBlocked

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

analyzeInjectivity, 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

DefaultBooleanNormFunctionSymbol

protected DefaultBooleanNormFunctionSymbol(DBTermType booleanType,
                                           DBTermType stringType)

Method Detail

getInputType

public Optional<DBTermType> getInputType()

isTemporary

public boolean isTemporary()

isSimple

public boolean isSimple()

Description copied from interface: DBTypeConversionFunctionSymbol

Returns true if does not transform the string representation of the value (i.e. no normalization). Useful for simplifying nested casts ( A-to-B(B-to-A(x)) === x if both casts are simple)

isAlwaysInjectiveInTheAbsenceOfNonInjectiveFunctionalTerms

public boolean isAlwaysInjectiveInTheAbsenceOfNonInjectiveFunctionalTerms()

Here we assume that the DB has only one way to represent the boolean value as a string

Specified by:

isAlwaysInjectiveInTheAbsenceOfNonInjectiveFunctionalTerms in class FunctionSymbolImpl

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).

convertDBConstant

protected DBConstant convertDBConstant(DBConstant constant,
                                       TermFactory termFactory)
                                throws AbstractDBTypeConversionFunctionSymbolImpl.DBTypeConversionException

Specified by:

convertDBConstant in class AbstractDBTypeConversionFunctionSymbolImpl

Throws:

AbstractDBTypeConversionFunctionSymbolImpl.DBTypeConversionException

getNativeDBString

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

Description copied from interface: DBFunctionSymbolSerializer

Returns a String in the native query language.

transformIntoDBCase

protected ImmutableFunctionalTerm transformIntoDBCase(ImmutableTerm subTerm,
                                                      TermFactory termFactory)