Added generic validator fucntion to TenantConfigurationKey

Signed-off-by: Nonnenmacher Fabian <fabian.nonnenmacher@bosch-si.com>

hawkbit-repository/src/main/java/org/eclipse/hawkbit/repository/model/helper/DurationHelper.java

@@ -1,70 +0,0 @@
-package org.eclipse.hawkbit.repository.model.helper;
-
-import java.time.Duration;
-import java.time.LocalTime;
-import java.time.format.DateTimeFormatter;
-import java.time.format.DateTimeParseException;
-import java.time.temporal.TemporalAccessor;
-
-/**
- * This class is a helper for converting a duration into a string and for the
- * other way. The string is in the format expected in configuration and database
- * {@link #DURATION_FORMAT}.
- *
- */
-public class DurationHelper {
-
-    /**
-     * Format of the String expected in configuration file and in the database.
-     */
-    public static final String DURATION_FORMAT = "HH:mm:ss";
-
-    /**
-     * Converts a Duration into a formatted String
-     * 
-     * @param duration
-     *            duration, which will be converted into a formatted String
-     * @return String in the duration format, specified at
-     *         {@link #DURATION_FORMAT}
-     */
-    public String durationToFormattedString(final Duration duration) {
-        if (duration == null) {
-            return null;
-        }
-
-        return LocalTime.ofNanoOfDay(duration.toNanos()).format(DateTimeFormatter.ofPattern(DURATION_FORMAT));
-    }
-
-    /**
-     * Converts a formatted Sting into a Duration object.
-     * 
-     * @param formattedDuration
-     *            String in {@link #DURATION_FORMAT}
-     * @return duration
-     * @throws DateTimeParseException
-     *             when String is in wrong format
-     */
-    public Duration formattedStringToDuration(final String formattedDuration) throws DateTimeParseException {
-        if (formattedDuration == null) {
-            return null;
-        }
-
-        final TemporalAccessor ta = DateTimeFormatter.ofPattern(DURATION_FORMAT).parse(formattedDuration.trim());
-        return Duration.between(LocalTime.MIDNIGHT, LocalTime.from(ta));
-    }
-
-    /**
-     * converts values of time constants to a Duration object..
-     * 
-     * @param hours
-     *            count of hours
-     * @param minutes
-     *            count of minutes
-     * @param seconds
-     *            count of seconds
-     * @return duration
-     */
-    public Duration getDurationByTimeValues(final long hours, final long minutes, final long seconds) {
-        return Duration.ofHours(hours).plusMinutes(minutes).plusSeconds(seconds);
-    }
-}