Examples of ch.agent.t2.time.TimeDomainFactory

ch.agent.t2.time.Range
TimeDomainFactory is an interface for defining and retrieving {@link TimeDomain} objects. A time domain factory ensures that there is onlyone domain for a given set of properties. A factory can provide built-in domains guaranteed to be available whenever the factory is present. They are created when the factory class is loaded. The labels of such domains can be used as external identifiers.
There are ways to access a given time domain which are more direct than retrieving it from the factory, but in the end the domain is still one managed by the factory. The following example code shows 4 different ways to get the same domain object, in this case the daily domain implemented by {@link Day}:
```
 TimeDomainFactory fac = TimeDomainManager.getFactory(); TimeDomain d1 = new Day("0102-03-04").getTimeDomain(); TimeDomain d2 = Day.DOMAIN; TimeDomain d3 = fac.get("daily"); TimeDomain d4 = fac.get(new TimeDomainDefinition(null, Resolution.DAY, 0L)); assertSame(d1, d2); assertSame(d1, d3); assertSame(d1, d4); 
```
TimeDomainFactory was designed under the following assumptions:
1. A time domain factory is implemented as a singleton, return by the static method getInstance().
2. The reason to have different factories is to provide different sets of built-in domains to applications.
3. A Time2 application uses a single factory. The factory is accessed via the {@link TimeDomainManager}.
See the class comment in {@link AbstractTimeDomainFactory} for an example of a concretefactory.
It is possible to bypass the factory mechanism, but this requires using non-public methods. @author Jean-Paul Vetterli @see TimeDomainDefinition @see DefaultTimeDomainFactory

    }


    @Override
    public DateTime scan(String value) throws T2DBException {
      try {
        return new DateTime(value);
      } catch (Exception e) {
        throw T2DBMsg.exception(e, D.D10107, value, ValueType.class.getName());
      }
    }

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    }


    @Override
    public Day scan(String value) throws T2DBException {
      try {
        return new Day(value);
      } catch (Exception e) {
        throw T2DBMsg.exception(e, D.D10107, value, ValueType.class.getName());
      }
    }

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   * @param expr a non-null day expression
   * @return a Day
   * @throws T2Exception
   */
  public static Day parseDay(String expr) throws T2Exception {
    return new Day(parseDay(expr, Day.DOMAIN, Adjustment.NONE));
  }

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    if (month == 0) {
      month = 1;
      daysInPeriod = isLeap(year) ? 366 : 365;
    } else
      daysInPeriod = daysInMonth(year, month);
    TimeIndex t = new Day(year, month, 1);
    DayOfWeek firstOfPeriod = t.getDayOfWeek();
    int workRank = rank;
    if (workRank < 0)
      workRank = max; // try the max 
    int week1Offset = name.ordinal() - firstOfPeriod.ordinal();
    if (week1Offset < 0)

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    if (time.getTimeDomain().compareResolutionTo(Resolution.MONTH) > 0)
      throw T2Msg.exception(K.T1059, time.toString(), Resolution.MONTH.name());
    long y = time.getYear();
    int m = time.getMonth();
    int day = getDayByRank(y, m, dayName, rank);
    return day == 0 ? null : new Day(y, m, day);
  }

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    int yearDay = getDayByRank(y, 0, dayName, rank);
    if (yearDay == 0)
      return null;
    else {
      int[] md = computeMonthAndDay(y, yearDay);
      return new Day(y, md[0], md[1]);
    }
  }

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      month = 1;
      daysInPeriod = isLeap(year) ? 366 : 365;
    } else
      daysInPeriod = daysInMonth(year, month);
    TimeIndex t = new Day(year, month, 1);
    DayOfWeek firstOfPeriod = t.getDayOfWeek();
    int workRank = rank;
    if (workRank < 0)
      workRank = max; // try the max 
    int week1Offset = name.ordinal() - firstOfPeriod.ordinal();
    if (week1Offset < 0)
      week1Offset += 7;
    int dayOfPeriod = 1 + week1Offset + (workRank - 1) * 7;
    if (rank < 0) {
      if (dayOfPeriod > daysInPeriod)

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        if (domain != null) {
          Exception cause = T2Msg.exception(K.T0007, domain.toString());
          throw T2Msg.runtimeException(K.T0001, cause);
        }
      }
      ExternalTimeFormat externalFormat = getExternalTimeFormat();
      if (externalFormat == null)
        externalFormat = DefaultExternalFormat.getInstance();
      domain = new TimeFactory(def, externalFormat);
      domains.put(def.getLabel(), (TimeFactory)domain);
    }

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  private PreparedStatement select_range;
  private static final String SELECT_RANGE = 
    "select min(date), max(date) from " + DB.VALUE_DOUBLE + " where series = ?";
  @Override
  public Range getRange(Series<Double> series) throws T2DBException {
    Range range = null;
    TimeDomain timeDomain = series.getTimeDomain();
    try {
      select_range = open(SELECT_RANGE, series, select_range);
      select_range.setInt(1, getId(series));
      ResultSet rs = select_range.executeQuery();
      if (rs.next()) {
        range = new Range(timeDomain.timeFromOffset(rs.getInt(1)), timeDomain.timeFromOffset(rs.getInt(2)));
        if (rs.wasNull())
          range = null;
      }
    } catch (Exception e) {
      throw T2DBJMsg.exception(e, J.J50122, series.getName(true));
    } finally {
      select_range = close(select_range);
    }
    if (range == null)
      range = new Range(series.getTimeDomain());
    return range;
  }

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  }


  @Override
  public T getValue(TimeIndex time) throws T2Exception, T2DBException {
    checkTime(time);
    return getValues(new Range(time, time)).get(time);
  }

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