yesamer commented on code in PR #6299:
URL: 
https://github.com/apache/incubator-kie-drools/pull/6299#discussion_r2055808560


##########
kie-dmn/kie-dmn-feel/src/main/java/org/kie/dmn/feel/runtime/functions/DateAndTimeFunction.java:
##########
@@ -119,71 +124,57 @@ public FEELFnResult<TemporalAccessor> 
invoke(@ParameterName( "year" ) Number yea
         return invoke( year, month, day, hour, minute, second, (Number) null );
     }
 
-    public FEELFnResult<TemporalAccessor> invoke(@ParameterName( "year" ) 
Number year, @ParameterName( "month" ) Number month, @ParameterName( "day" ) 
Number day,
-                                                 @ParameterName( "hour" ) 
Number hour, @ParameterName( "minute" ) Number minute, @ParameterName( "second" 
) Number second,
-                                                 @ParameterName( "hour offset" 
) Number hourOffset ) {
-        if ( year == null ) {
-            return FEELFnResult.ofError(new 
InvalidParametersEvent(Severity.ERROR, "year", "cannot be null"));
-        }
-        if ( month == null ) {
-            return FEELFnResult.ofError(new 
InvalidParametersEvent(Severity.ERROR, "month", "cannot be null"));
-        }
-        if ( day == null ) {
-            return FEELFnResult.ofError(new 
InvalidParametersEvent(Severity.ERROR, "day", "cannot be null"));
-        }
-        if ( hour == null ) {
-            return FEELFnResult.ofError(new 
InvalidParametersEvent(Severity.ERROR, "hour", "cannot be null"));
-        }
-        if ( minute == null ) {
-            return FEELFnResult.ofError(new 
InvalidParametersEvent(Severity.ERROR, "minute", "cannot be null"));
-        }
-        if ( second == null ) {
-            return FEELFnResult.ofError(new 
InvalidParametersEvent(Severity.ERROR, "second", "cannot be null"));
-        }
-
+    public FEELFnResult<TemporalAccessor> invoke(@ParameterName("year") Number 
year, @ParameterName("month") Number month, @ParameterName("day") Number day,
+                                                 @ParameterName("hour") Number 
hour, @ParameterName("minute") Number minute, @ParameterName("second") Number 
second,
+                                                 @ParameterName("hour offset") 
Number hourOffset) {
         try {
-            if( hourOffset != null ) {
-                return FEELFnResult.ofResult( OffsetDateTime.of( 
year.intValue(), month.intValue(), day.intValue(),
-                                                                
hour.intValue(), minute.intValue(), second.intValue(),
-                                                     0, ZoneOffset.ofHours( 
hourOffset.intValue() ) ) );
+            int coercedYear = coerceIntegerNumber(year).orElseThrow();
+            int coercedMonth = coerceIntegerNumber(month).orElseThrow();
+            int coercedDay = coerceIntegerNumber(day).orElseThrow();
+            int coercedHour = coerceIntegerNumber(hour).orElseThrow();
+            int coercedMinute = coerceIntegerNumber(minute).orElseThrow();
+            int coercedSecond = coerceIntegerNumber(second).orElseThrow();

Review Comment:
   ~~@ChinchuAjith `orElseThrow()` with an empty parameter will throw an NPE. 
Is that the expected behaviour?~~



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