content: /*
   * Copyright (C) 2012-2023 52°North Spatial Information Research GmbH
   *
   * This program is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 as published
   * by the Free Software Foundation.
   *
   * If the program is linked with libraries which are licensed under one of
   * the following licenses, the combination of the program with the linked
   * library is not considered a "derivative work" of the program:
   *
   *     - Apache License, version 2.0
   *     - Apache Software License, version 1.0
   *     - GNU Lesser General Public License, version 3
   *     - Mozilla Public License, versions 1.0, 1.1 and 2.0
   *     - Common Development and Distribution License (CDDL), version 1.0
   *
   * Therefore the distribution of the program linked with libraries licensed
   * under the aforementioned licenses, is permitted by the copyright holders
   * if the distribution is compliant with both the GNU General Public
   * License version 2 and the aforementioned licenses.
   *
   * This program is distributed in the hope that it will be useful, but
   * WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
   * Public License for more details.
   */
  package org.n52.sos.ds.observation;
  
  import java.util.Date;
  
  import org.joda.time.DateTime;
  import org.joda.time.DateTimeZone;
  import org.n52.series.db.beans.DataEntity;
  import org.n52.shetland.ogc.gml.time.Time;
  import org.n52.shetland.ogc.gml.time.TimeInstant;
  import org.n52.shetland.ogc.gml.time.TimePeriod;
  import org.n52.shetland.util.DateTimeHelper;
  import org.n52.svalbard.util.GmlHelper;
  
  public interface DataTimeCreator {
  
      static Time createPhenomenonTime(DataEntity data) {
          // create time element
          DateTime end = DateTimeHelper.makeDateTime(data.getSamplingTimeEnd());
          DateTime start = null;
          if (data.getSamplingTimeStart() != null) {
              start = DateTimeHelper.makeDateTime(data.getSamplingTimeStart());
          } else {
              start = end;
          }
          return GmlHelper.createTime(start, end);
      }
  
      /**
       * Create result time from {@link Date}
       *
       * @param date
       *            {@link Date} to create result time from
       * @return result time
       */
      default TimeInstant createResultTime(Date date) {
          DateTime dateTime = new DateTime(date, DateTimeZone.UTC);
          return new TimeInstant(dateTime);
      }
  
      /**
       * Create {@link TimePeriod} from {@link Date}s
       *
       * @param start
       *            Start {@link Date}
       * @param end
       *            End {@link Date}
       * @return {@link TimePeriod} or null if {@link Date}s are null
       */
      default TimePeriod createValidTime(Date start, Date end) {
          // create time element
          if (start != null && end != null) {
              final DateTime startTime = new DateTime(start, DateTimeZone.UTC);
              DateTime endTime = new DateTime(end, DateTimeZone.UTC);
              return new TimePeriod(startTime, endTime);
          }
          return null;
      }
  
  }
  