Examples with LocalDateTimeValue org.knime.core.data.time.localdatetime.LocalDateTimeValue used on opensource projects

Example 6 with LocalDateTimeValue

use of org.knime.core.data.time.localdatetime.LocalDateTimeValue in project knime-core by knime.

the class LocalDateTimeMedianOperator method createCustomMeanMedianMetod.

private static EvenListMedianMethod createCustomMeanMedianMetod() {
    return new EvenListMedianMethod() {

        @Override
        public DataCell extractMedian(final List<DataCell> cells, final int lowerCandidateIdx, final int upperCandidateIdx) {
            final LocalDateTime dateTime1 = ((LocalDateTimeValue) cells.get(lowerCandidateIdx)).getLocalDateTime();
            final LocalDateTime dateTime2 = ((LocalDateTimeValue) cells.get(upperCandidateIdx)).getLocalDateTime();
            // calculate mean (seconds), keep decimals for further calculations
            final double meanTimestampSeconds = (dateTime1.toEpochSecond(ZoneOffset.UTC) + dateTime2.toEpochSecond(ZoneOffset.UTC)) / 2.0;
            // calculate mean (nanos), round fraction of nano
            final int meanTimestampNanos = (int) (meanTimestampSeconds - (long) meanTimestampSeconds + (dateTime1.getNano() + dateTime2.getNano()) / 2.0 + 0.5);
            final LocalDateTime meanDateTime = LocalDateTime.ofEpochSecond((long) meanTimestampSeconds, meanTimestampNanos, ZoneOffset.UTC);
            return LocalDateTimeCellFactory.create(meanDateTime);
        }
    };
}