How to use

getStartDate

method

in

org.hisp.dhis.category.CategoryOption

public Date getLatestStartDate()
{
  Date latestStartDate = null;
  for ( CategoryOption co : getCategoryOptions() )
  {
    if ( co.getStartDate() != null )
    {
      latestStartDate = (latestStartDate == null || latestStartDate.before( co.getStartDate() ) ?
        co.getStartDate() : latestStartDate);
    }
  }
  return latestStartDate;
}

/**
 * Gets a range of valid dates for this (attribute) cateogry option combo.
 * <p>
 * The earliest valid date is the latest start date (if any) from all the
 * category options associated with this option combo.
 * <p>
 * The latest valid date is the earliest end date (if any) from all the
 * category options associated with this option combo.
 *
 * @return valid date range for this (attribute) category option combo.
 */
public DateRange getDateRange()
{
  Date latestStartDate = null;
  Date earliestEndDate = null;
  for ( CategoryOption option : getCategoryOptions() )
  {
    if ( option.getStartDate() != null && (latestStartDate == null || option.getStartDate().compareTo( latestStartDate ) > 0) )
    {
      latestStartDate = option.getStartDate();
    }
    if ( option.getEndDate() != null && (earliestEndDate == null || option.getStartDate().compareTo( earliestEndDate ) < 0) )
    {
      earliestEndDate = option.getEndDate();
    }
  }
  return new DateRange( latestStartDate, earliestEndDate );
}

public Date getEarliestEndDate()
{
  Date earliestEndDate = null;
  for ( CategoryOption co : getCategoryOptions() )
  {
    if ( co.getEndDate() != null )
    {
      earliestEndDate = (earliestEndDate == null || earliestEndDate.after( co.getEndDate() ) ?
        co.getStartDate() : earliestEndDate);
    }
  }
  return earliestEndDate;
}

Date startDate = DateUtils.min( optionComboOptions.stream().map( co -> co.getStartDate() ).collect( Collectors.toSet() ) );
Date endDate = DateUtils.max( optionComboOptions.stream().map( co -> co.getEndDate() ).collect( Collectors.toSet() ) );