Added new DateTime functions

core/model/src/main/java/it/unibz/inf/ontop/model/term/TermFactory.java

@@ -643,4 +643,17 @@ ImmutableFunctionalTerm getBinaryLatelyTypedFunctionalTerm(
 	ImmutableExpression getDBJsonIsNumber(DBTermType dbType, ImmutableTerm arg);
 	ImmutableExpression getDBJsonIsScalar(DBTermType dbType, ImmutableTerm arg);
 	ImmutableExpression getDBIsArray(DBTermType dbType, ImmutableTerm arg);
+
+
+	// Ontop-defined functions
+
+	ImmutableFunctionalTerm getDBWeek(ImmutableTerm dbDatetimeTerm);
+	ImmutableFunctionalTerm getDBQuarter(ImmutableTerm dbDatetimeTerm);
+	ImmutableFunctionalTerm getDBDecade(ImmutableTerm dbDatetimeTerm);
+	ImmutableFunctionalTerm getDBCentury(ImmutableTerm dbDatetimeTerm);
+	ImmutableFunctionalTerm getDBMillennium(ImmutableTerm dbDatetimeTerm);
+	ImmutableFunctionalTerm getDBMilliseconds(ImmutableTerm dbDatetimeTerm);
+	ImmutableFunctionalTerm getDBMicroseconds(ImmutableTerm dbDatetimeTerm);
+
+	ImmutableFunctionalTerm getDBDateTrunc(ImmutableTerm dbDatetimeTerm, ImmutableTerm datePartTerm, String datePart);
 }

core/model/src/main/java/it/unibz/inf/ontop/model/term/functionsymbol/db/DBFunctionSymbolFactory.java

@@ -5,7 +5,6 @@
 import it.unibz.inf.ontop.model.term.functionsymbol.FunctionSymbol;
 import it.unibz.inf.ontop.model.term.functionsymbol.InequalityLabel;
 import it.unibz.inf.ontop.model.type.DBTermType;
-import it.unibz.inf.ontop.model.type.GenericDBTermType;
 import it.unibz.inf.ontop.model.type.RDFTermType;
 import org.apache.commons.rdf.api.IRI;
 
@@ -392,4 +391,14 @@ public interface DBFunctionSymbolFactory {
     DBFunctionSymbol checkAndConvertDateFromDatetime();
     DBFunctionSymbol checkAndConvertDateFromString();
 
+
+    DBFunctionSymbol getDBWeek();
+    DBFunctionSymbol getDBQuarter();
+    DBFunctionSymbol getDBDecade();
+    DBFunctionSymbol getDBCentury();
+    DBFunctionSymbol getDBMillennium();
+    DBFunctionSymbol getDBMilliseconds();
+    DBFunctionSymbol getDBMicroseconds();
+
+    DBFunctionSymbol getDBDateTrunc(String datePart);
 }

core/model/src/main/java/it/unibz/inf/ontop/model/term/functionsymbol/db/impl/AbstractDBFunctionSymbolFactory.java

@@ -85,6 +85,23 @@ public abstract class AbstractDBFunctionSymbolFactory implements DBFunctionSymbo
     private DBFunctionSymbol minutesFunctionSymbol;
     // Created in init()
     private DBFunctionSymbol secondsFunctionSymbol;
+    //Created in init
+    private DBFunctionSymbol weekFunctionSymbol;
+    //Created in init
+    private DBFunctionSymbol quarterFunctionSymbol;
+    //Created in init
+    private DBFunctionSymbol decadeFunctionSymbol;
+    //Created in init
+    private DBFunctionSymbol centuryFunctionSymbol;
+    //Created in init
+    private DBFunctionSymbol millenniumFunctionSymbol;
+    //Created in init
+    private DBFunctionSymbol millisecondsFunctionSymbol;
+    //Created in init
+    private DBFunctionSymbol microsecondsFunctionSymbol;
+    //Created in init
+    private DBFunctionSymbol dateTruncFunctionSymbol;
+    //Created in init
     // Created in init()
     private DBFunctionSymbol tzFunctionSymbol;
 
@@ -429,6 +446,14 @@ protected void init() {
         hoursFunctionSymbol = createHoursFunctionSymbol();
         minutesFunctionSymbol = createMinutesFunctionSymbol();
         secondsFunctionSymbol = createSecondsFunctionSymbol();
+        weekFunctionSymbol = createWeekFunctionSymbol();
+        quarterFunctionSymbol = createQuarterFunctionSymbol();
+        decadeFunctionSymbol = createDecadeFunctionSymbol();
+        centuryFunctionSymbol = createCenturyFunctionSymbol();
+        millenniumFunctionSymbol = createMillenniumFunctionSymbol();
+        millisecondsFunctionSymbol = createMillisecondsFunctionSymbol();
+        microsecondsFunctionSymbol = createMicrosecondsFunctionSymbol();
+        dateTruncFunctionSymbol = createDateTruncFunctionSymbol();
         tzFunctionSymbol = createTzFunctionSymbol();
 
         weeksBetweenFromDateTimeFunctionSymbol = createWeeksBetweenFromDateTimeFunctionSymbol();
@@ -974,6 +999,46 @@ public DBFunctionSymbol getDBHours() {
         return hoursFunctionSymbol;
     }
 
+    @Override
+    public DBFunctionSymbol getDBWeek() {
+        return weekFunctionSymbol;
+    }
+
+    @Override
+    public DBFunctionSymbol getDBQuarter() {
+        return quarterFunctionSymbol;
+    }
+
+    @Override
+    public DBFunctionSymbol getDBCentury() {
+        return centuryFunctionSymbol;
+    }
+
+    @Override
+    public DBFunctionSymbol getDBDecade() {
+        return decadeFunctionSymbol;
+    }
+
+    @Override
+    public DBFunctionSymbol getDBMillennium() {
+        return millenniumFunctionSymbol;
+    }
+
+    @Override
+    public DBFunctionSymbol getDBMilliseconds() {
+        return millisecondsFunctionSymbol;
+    }
+
+    @Override
+    public DBFunctionSymbol getDBMicroseconds() {
+        return microsecondsFunctionSymbol;
+    }
+
+    @Override
+    public DBFunctionSymbol getDBDateTrunc(String datePart) {
+        return dateTruncFunctionSymbol;
+    }
+
     @Override
     public DBFunctionSymbol getDBMinutes() {
         return minutesFunctionSymbol;
@@ -1374,6 +1439,51 @@ protected DBFunctionSymbol createMinutesFunctionSymbol() {
                 this::serializeMinutes);
     }
 
+    protected DBFunctionSymbol createWeekFunctionSymbol() {
+        return new UnaryDBFunctionSymbolWithSerializerImpl("DB_WEEK", rootDBType, dbIntegerType, false,
+                this::serializeWeek);
+    }
+
+    protected DBFunctionSymbol createQuarterFunctionSymbol() {
+        return new UnaryDBFunctionSymbolWithSerializerImpl("DB_QUARTER", rootDBType, dbIntegerType, false,
+                this::serializeQuarter);
+    }
+
+    protected DBFunctionSymbol createDecadeFunctionSymbol() {
+        return new UnaryDBFunctionSymbolWithSerializerImpl("DB_DECADE", rootDBType, dbIntegerType, false,
+                this::serializeDecade);
+    }
+
+    protected DBFunctionSymbol createCenturyFunctionSymbol() {
+        return new UnaryDBFunctionSymbolWithSerializerImpl("DB_CENTURY", rootDBType, dbIntegerType, false,
+                this::serializeCentury);
+    }
+
+    protected DBFunctionSymbol createMillenniumFunctionSymbol() {
+        return new UnaryDBFunctionSymbolWithSerializerImpl("DB_MILLENNIUM", rootDBType, dbIntegerType, false,
+                this::serializeMillennium);
+    }
+
+    protected DBFunctionSymbol createMillisecondsFunctionSymbol() {
+        return new UnaryDBFunctionSymbolWithSerializerImpl("DB_MILLISECONDS", rootDBType, dbDecimalType, false,
+                this::serializeMilliseconds);
+    }
+
+    protected DBFunctionSymbol createMicrosecondsFunctionSymbol() {
+        return new UnaryDBFunctionSymbolWithSerializerImpl("DB_MICROSECONDS", rootDBType, dbIntegerType, false,
+                this::serializeMicroseconds);
+    }
+
+    protected DBFunctionSymbol createDateTruncFunctionSymbol() {
+        return new DBFunctionSymbolWithSerializerImpl("DB_DATE_TRUNC", ImmutableList.of(dbStringType, dbDateType), dbDateType, false,
+                this::serializeDateTrunc) {
+            @Override
+            protected boolean mayReturnNullWithoutNullArguments() {
+                return false;
+            }
+        };
+    }
+
     protected DBFunctionSymbol createSecondsFunctionSymbol() {
         return new UnaryDBFunctionSymbolWithSerializerImpl("DB_SECONDS", rootDBType, dbDecimalType, false,
                 this::serializeSeconds);
@@ -1553,6 +1663,38 @@ protected abstract String serializeSeconds(ImmutableList<? extends ImmutableTerm
                                             Function<ImmutableTerm, String> termConverter,
                                             TermFactory termFactory);
 
+    protected abstract String serializeWeek(ImmutableList<? extends ImmutableTerm> terms,
+                                               Function<ImmutableTerm, String> termConverter,
+                                               TermFactory termFactory);
+
+    protected abstract String serializeQuarter(ImmutableList<? extends ImmutableTerm> terms,
+                                               Function<ImmutableTerm, String> termConverter,
+                                               TermFactory termFactory);
+
+    protected abstract String serializeDecade(ImmutableList<? extends ImmutableTerm> terms,
+                                               Function<ImmutableTerm, String> termConverter,
+                                               TermFactory termFactory);
+
+    protected abstract String serializeCentury(ImmutableList<? extends ImmutableTerm> terms,
+                                               Function<ImmutableTerm, String> termConverter,
+                                               TermFactory termFactory);
+
+    protected abstract String serializeMillennium(ImmutableList<? extends ImmutableTerm> terms,
+                                               Function<ImmutableTerm, String> termConverter,
+                                               TermFactory termFactory);
+
+    protected abstract String serializeMilliseconds(ImmutableList<? extends ImmutableTerm> terms,
+                                               Function<ImmutableTerm, String> termConverter,
+                                               TermFactory termFactory);
+
+    protected abstract String serializeMicroseconds(ImmutableList<? extends ImmutableTerm> terms,
+                                               Function<ImmutableTerm, String> termConverter,
+                                               TermFactory termFactory);
+
+    protected abstract String serializeDateTrunc(ImmutableList<? extends ImmutableTerm> terms,
+                                                    Function<ImmutableTerm, String> termConverter,
+                                                    TermFactory termFactory);
+
     protected abstract String serializeTz(ImmutableList<? extends ImmutableTerm> terms,
                                                Function<ImmutableTerm, String> termConverter,
                                                TermFactory termFactory);

core/model/src/main/java/it/unibz/inf/ontop/model/term/functionsymbol/db/impl/SQLServerDBIsTrueFunctionSymbolImpl.java → core/model/src/main/java/it/unibz/inf/ontop/model/term/functionsymbol/db/impl/EqualsTrueDBIsTrueFunctionSymbolImpl.java

@@ -8,9 +8,9 @@
 
 import java.util.function.Function;
 
-public class SQLServerDBIsTrueFunctionSymbolImpl extends DefaultDBIsTrueFunctionSymbol {
+public class EqualsTrueDBIsTrueFunctionSymbolImpl extends DefaultDBIsTrueFunctionSymbol {
 
-    protected SQLServerDBIsTrueFunctionSymbolImpl(DBTermType dbBooleanTermType) {
+    protected EqualsTrueDBIsTrueFunctionSymbolImpl(DBTermType dbBooleanTermType) {
         super(dbBooleanTermType);
     }
 

core/model/src/main/java/it/unibz/inf/ontop/model/term/functionsymbol/db/impl/MockupDBFunctionSymbolFactory.java

@@ -390,6 +390,46 @@ protected String serializeSeconds(ImmutableList<? extends ImmutableTerm> terms,
         throw new UnsupportedOperationException("Operation not supported by the MockupDBFunctionSymbolFactory");
     }
 
+    @Override
+    protected String serializeWeek(ImmutableList<? extends ImmutableTerm> terms, Function<ImmutableTerm, String> termConverter, TermFactory termFactory) {
+        throw new UnsupportedOperationException("Operation not supported by the MockupDBFunctionSymbolFactory");
+    }
+
+    @Override
+    protected String serializeQuarter(ImmutableList<? extends ImmutableTerm> terms, Function<ImmutableTerm, String> termConverter, TermFactory termFactory) {
+        throw new UnsupportedOperationException("Operation not supported by the MockupDBFunctionSymbolFactory");
+    }
+
+    @Override
+    protected String serializeDecade(ImmutableList<? extends ImmutableTerm> terms, Function<ImmutableTerm, String> termConverter, TermFactory termFactory) {
+        throw new UnsupportedOperationException("Operation not supported by the MockupDBFunctionSymbolFactory");
+    }
+
+    @Override
+    protected String serializeCentury(ImmutableList<? extends ImmutableTerm> terms, Function<ImmutableTerm, String> termConverter, TermFactory termFactory) {
+        throw new UnsupportedOperationException("Operation not supported by the MockupDBFunctionSymbolFactory");
+    }
+
+    @Override
+    protected String serializeMillennium(ImmutableList<? extends ImmutableTerm> terms, Function<ImmutableTerm, String> termConverter, TermFactory termFactory) {
+        throw new UnsupportedOperationException("Operation not supported by the MockupDBFunctionSymbolFactory");
+    }
+
+    @Override
+    protected String serializeMilliseconds(ImmutableList<? extends ImmutableTerm> terms, Function<ImmutableTerm, String> termConverter, TermFactory termFactory) {
+        throw new UnsupportedOperationException("Operation not supported by the MockupDBFunctionSymbolFactory");
+    }
+
+    @Override
+    protected String serializeMicroseconds(ImmutableList<? extends ImmutableTerm> terms, Function<ImmutableTerm, String> termConverter, TermFactory termFactory) {
+        throw new UnsupportedOperationException("Operation not supported by the MockupDBFunctionSymbolFactory");
+    }
+
+    @Override
+    protected String serializeDateTrunc(ImmutableList<? extends ImmutableTerm> terms, Function<ImmutableTerm, String> termConverter, TermFactory termFactory) {
+        throw new UnsupportedOperationException("Operation not supported by the MockupDBFunctionSymbolFactory");
+    }
+
     @Override
     protected String serializeTz(ImmutableList<? extends ImmutableTerm> terms, Function<ImmutableTerm, String> termConverter, TermFactory termFactory) {
         throw new UnsupportedOperationException("Operation not supported by the MockupDBFunctionSymbolFactory");
@@ -913,4 +953,6 @@ protected String serializeCheckAndConvertDateFromString(ImmutableList<? extends
         throw new UnsupportedOperationException("Operation not supported by the MockupDBFunctionSymbolFactory");
     }
 
+
+
 }

core/model/src/main/java/it/unibz/inf/ontop/model/term/functionsymbol/impl/DateTruncSPARQLFunctionSymbolImpl.java

@@ -0,0 +1,101 @@
+package it.unibz.inf.ontop.model.term.functionsymbol.impl;
+
+import com.google.common.collect.ImmutableList;
+import it.unibz.inf.ontop.iq.node.VariableNullability;
+import it.unibz.inf.ontop.model.term.*;
+import it.unibz.inf.ontop.model.term.functionsymbol.RDFTermFunctionSymbol;
+import it.unibz.inf.ontop.model.term.functionsymbol.db.DBFunctionSymbol;
+import it.unibz.inf.ontop.model.term.functionsymbol.impl.ofn.OfnMultitypedInputBinarySPARQLFunctionSymbolImpl;
+import it.unibz.inf.ontop.model.term.impl.RDFTermTypeConstantImpl;
+import it.unibz.inf.ontop.model.type.DBTermType;
+import it.unibz.inf.ontop.model.type.DBTypeFactory;
+import it.unibz.inf.ontop.model.type.RDFTermType;
+import it.unibz.inf.ontop.model.type.TermTypeInference;
+import it.unibz.inf.ontop.model.vocabulary.Ontop;
+import org.apache.commons.rdf.api.IRI;
+
+import javax.annotation.Nonnull;
+import java.util.Arrays;
+import java.util.Optional;
+import java.util.function.BiFunction;
+import java.util.function.Function;
+
+public class DateTruncSPARQLFunctionSymbolImpl extends ReduciblePositiveAritySPARQLFunctionSymbolImpl {
+
+    private final static String[] supportedDateParts = new String[] {
+            "microsecond",
+            "millisecond",
+            "microseconds",
+            "milliseconds",
+            "second",
+            "minute",
+            "hour",
+            "day",
+            "week",
+            "month",
+            "quarter",
+            "year",
+            "decade",
+            "century",
+            "millennium"
+    };
+
+    private final Function<String, DBFunctionSymbol> dbFunctionSymbolFunction;
+    private final RDFTermType targetType;
+
+
+    public DateTruncSPARQLFunctionSymbolImpl(@Nonnull RDFTermType inputDateType,
+                                             @Nonnull RDFTermType inputSecondType,
+                                             @Nonnull Function<String, DBFunctionSymbol> dbFunctionSymbolFunction) {
+        super("SP_DATE_TRUNC", Ontop.DATE_TRUNC, ImmutableList.of(inputDateType, inputSecondType));
+        this.targetType = inputDateType;
+        this.dbFunctionSymbolFunction = dbFunctionSymbolFunction;
+    }
+
+    @Override
+    protected ImmutableTerm computeLexicalTerm(ImmutableList<ImmutableTerm> subLexicalTerms,
+                                               ImmutableList<ImmutableTerm> typeTerms, TermFactory termFactory,
+                                               ImmutableTerm returnedTypeTerm) {
+        if(!(subLexicalTerms.get(1) instanceof Constant)) {
+            //TODO - create more specialized exception to throw here.
+            throw new RuntimeException("Only constants are supported as Date-Part parameter.");
+        }
+        var constant = (Constant)subLexicalTerms.get(1);
+        var value = constant.getValue();
+        if(!Arrays.stream(supportedDateParts)
+                .anyMatch(part -> part.equalsIgnoreCase(value))) {
+            //TODO - create more specialized exception to throw here.
+            throw new RuntimeException(String.format("Date-Part %s is not supported.", value));
+        }
+
+        return termFactory.getConversion2RDFLexical(
+                termFactory.getImmutableFunctionalTerm(
+                        dbFunctionSymbolFunction.apply(value),
+                        termFactory.getConversionFromRDFLexical2DB(targetType.getClosestDBType(termFactory.getTypeFactory().getDBTypeFactory()), subLexicalTerms.get(0), targetType),
+                        subLexicalTerms.get(1)
+                ), targetType);
+    }
+
+    @Override
+    protected ImmutableTerm computeTypeTerm(ImmutableList<? extends ImmutableTerm> subLexicalTerms,
+                                            ImmutableList<ImmutableTerm> typeTerms, TermFactory termFactory,
+                                            VariableNullability variableNullability) {
+        return termFactory.getRDFTermTypeConstant(targetType);
+    }
+
+    @Override
+    public boolean isAlwaysInjectiveInTheAbsenceOfNonInjectiveFunctionalTerms() {
+        return false;
+    }
+
+    @Override
+    public Optional<TermTypeInference> inferType(ImmutableList<? extends ImmutableTerm> terms) {
+        return Optional.of(TermTypeInference.declareTermType(targetType));
+    }
+
+    @Override
+    public boolean canBePostProcessed(ImmutableList<? extends ImmutableTerm> arguments) {
+        return false;
+    }
+}
+