public static DateDatum createDate(Datum datum) {
switch (datum.type()) {
case INT4:
return new DateDatum(datum.asInt4());
case INT8:
return new DateDatum(datum.asInt4());
case TEXT:
return createDate(datum.asChars());
case DATE:
return (DateDatum) datum;
default:
throw new TajoRuntimeException(new InvalidValueForCastException(datum.type(), Type.DATE));
}
}
public static TimeDatum createTime(Datum datum) {
switch (datum.type()) {
case INT8:
return new TimeDatum(datum.asInt8());
case CHAR:
case VARCHAR:
case TEXT:
TimeMeta tm = DateTimeFormat.parseDateTime(datum.asChars(), "HH24:MI:SS.MS");
return new TimeDatum(DateTimeUtil.toTime(tm));
case TIME:
return (TimeDatum) datum;
default:
throw new TajoRuntimeException(new InvalidValueForCastException(datum.type(), Type.TIME));
}
}
public static TimestampDatum createTimestamp(Datum datum, @Nullable TimeZone tz) {
switch (datum.type()) {
case CHAR:
case VARCHAR:
case TEXT:
return parseTimestamp(datum.asChars(), tz);
case TIMESTAMP:
return (TimestampDatum) datum;
case DATE:
{
TimeMeta tm = datum.asTimeMeta();
if (tz != null) {
DateTimeUtil.toUTCTimezone(tm, tz);
}
return new TimestampDatum(DateTimeUtil.toJulianTimestamp(tm));
}
default:
throw new TajoRuntimeException(
new InvalidValueForCastException(datum.type(), Type.TIMESTAMP));
}
}