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

Class AbstractDBAggregationFunctionSymbol

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.AbstractAggregationFunctionSymbol

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

All Implemented Interfaces:

AggregationFunctionSymbol, DBFunctionSymbol, DBFunctionSymbolSerializer, FunctionSymbol, Predicate, Serializable

Direct Known Subclasses:

DBCountFunctionSymbolImpl, DBMaxFunctionSymbolImpl, DBMinFunctionSymbolImpl, NullIgnoringDBAvgFunctionSymbol, NullIgnoringDBGroupConcatFunctionSymbol, NullIgnoringDBSumFunctionSymbol

public abstract class AbstractDBAggregationFunctionSymbol
extends AbstractAggregationFunctionSymbol
implements DBFunctionSymbol

See Also:

Serialized Form

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	AbstractDBAggregationFunctionSymbol(String name, it.unibz.inf.ontop.com.google.common.collect.ImmutableList<TermType> expectedBaseTypes, DBTermType targetType, boolean isDistinct, DBFunctionSymbolSerializer serializer)

Method Summary

Modifier and Type	Method and Description
protected ImmutableTerm	buildTermAfterEvaluation(it.unibz.inf.ontop.com.google.common.collect.ImmutableList<ImmutableTerm> newTerms, TermFactory termFactory, VariableNullability variableNullability) By default, just build a new functional term.
String	getNativeDBString(it.unibz.inf.ontop.com.google.common.collect.ImmutableList<? extends ImmutableTerm> terms, Function<ImmutableTerm,String> termConverter, TermFactory termFactory) Returns a String in the native query language.
boolean	isPreferringToBePostProcessedOverBeingBlocked() If it is better to be post-processed than being blocked behind an UNION.

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

canBePostProcessed, inferType, isAggregation, isDistinct

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

analyzeInjectivity, canBeSafelyDecomposedIntoConjunction, decomposeInjectiveTopFunctionalTerm, enableIfElseNullLifting, evaluateIsNotNull, evaluateNullability, evaluateStrictEq, evaluateStrictEqWithFunctionalTerm, evaluateStrictEqWithNonNullConstant, getExpectedBaseType, getExpectedBaseTypes, isAlwaysInjectiveInTheAbsenceOfNonInjectiveFunctionalTerms, isDeterministic, isInjective, isNullable, mayReturnNullWithoutNullArguments, proposeProvenanceVariables, simplify, simplifyAsGuaranteedToBeNonNull, tolerateNulls, 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.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

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

evaluateEmptyBag

Constructor Detail

AbstractDBAggregationFunctionSymbol

protected AbstractDBAggregationFunctionSymbol(@Nonnull
                                              String name,
                                              @Nonnull
                                              it.unibz.inf.ontop.com.google.common.collect.ImmutableList<TermType> expectedBaseTypes,
                                              @Nonnull
                                              DBTermType targetType,
                                              boolean isDistinct,
                                              @Nonnull
                                              DBFunctionSymbolSerializer serializer)

Method Detail

getNativeDBString

public String getNativeDBString(it.unibz.inf.ontop.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.

Specified by:

getNativeDBString in interface DBFunctionSymbolSerializer

buildTermAfterEvaluation

protected ImmutableTerm buildTermAfterEvaluation(it.unibz.inf.ontop.com.google.common.collect.ImmutableList<ImmutableTerm> newTerms,
                                                 TermFactory termFactory,
                                                 VariableNullability variableNullability)

Description copied from class: FunctionSymbolImpl

By default, just build a new functional term. NB: If the function symbol does not tolerate NULL values, no need to handle them here.

Overrides:

buildTermAfterEvaluation in class FunctionSymbolImpl

isPreferringToBePostProcessedOverBeingBlocked

public boolean isPreferringToBePostProcessedOverBeingBlocked()

Description copied from interface: DBFunctionSymbol

If it is better to be post-processed than being blocked behind an UNION. Obviously, non post-processable function symbols must return false.

Specified by:

isPreferringToBePostProcessedOverBeingBlocked in interface DBFunctionSymbol