Examples of ch.agent.t2.time.TimeIndex

ch.agent.t2.time.TimeIndex
A TimeIndex object represents a time, or more precisely, a point in time. It consists of two elements:
1. a time domain,
2. a numerical index.
When required, the index is interpreted or generated by the time domain. However there are important and frequent operations which do not require interpretation and which can be performed efficiently using integer addition. An example is the creation of a new time index object by incrementing another one.
The design assumes that TimeIndex is implemented as an immutable object. @author Jean-Paul Vetterli @see TimeDomain

        select_last_double2.setInt(2, sid);
        rs = select_last_double2.executeQuery();
      }
      if (rs.next()) {
        TimeDomain dom = time == null ? series.getTimeDomain() : time.getTimeDomain();
        TimeIndex t = dom.timeFromOffset(rs.getInt(1));
        obs = new Observation<Double>(t, rs.getDouble(2));
      }
    } catch (Exception e) {
        throw T2DBJMsg.exception(e, J.J50124, series.getName(true), time.toString());
    } finally {

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   * @param domain a non-null time domain
   * @return the current time
   */
  public static TimeIndex now(TimeDomain domain) {
    try {
      TimeIndex t = new SystemTime();
      return t.convert(domain, Adjustment.DOWN);
    } catch (T2Exception e) {
      // should not occur because of the adjustment
      throw new RuntimeException(e);
    }
  }

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    TimeDomain contextDomain = context.getTimeDomain();
    if (beginExpr == null) {
      return new Range(contextDomain);
    } else {
      // be more permissive with context and fix ranges invalidated by conversion
      TimeIndex begin = beginExpr.getDate(context);
      TimeIndex end = endExpr.getDate(context);
      if (begin == null || end == null) // (consequence of empty context range when context needed)
        return new Range(contextDomain);
      else if (begin.compareTo(end) > 0 && (beginExpr.needContext() || endExpr.needContext()))
        return new Range(contextDomain);
      else {

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       * So for higher resolutions, offsets are applied in the context
       * domain.
       */
      if (domain.compareResolutionTo(Resolution.DAY) < 0) {
        // apply the offset in the DAILY domain
        TimeIndex t = addOffset(TimeUtil.now(Day.DOMAIN));
        return t.convert(domain, Adjustment.DOWN);
      } else {
        // apply the offset in the context domain
        return addOffset(TimeUtil.now(domain));
      }
    }

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   * 
   * @param begin 
   * @param keepBegin
   */
  private void eVRTodayLiteral(TimeDomain domain, DayExpression begin, boolean keepBegin) throws T2Exception {
    TimeIndex t = begin.getDate(domain);
    if (t.compareTo(time) > 0) {
      if (keepBegin)
        setTime(t);
      else {
        long diff = t.asLong() - time.asLong();
        long test = begin.offset + diff;
        if (Math.abs(test) <= Integer.MAX_VALUE)
          begin.incr((int)diff);
        else // change from TODAY to LITERAL
          begin.setTime(time);

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   * 
   * @param begin
   * @param keepBegin
   */
  private void eVRLiteralToday(TimeDomain domain, DayExpression begin, boolean keepBegin) throws T2Exception {
    TimeIndex t = getDate(domain);
    if (begin.time.compareTo(t) > 0) {
      if (keepBegin) {
        long diff = begin.time.asLong() - t.asLong();
        long test = offset + diff;
        if (Math.abs(test) <= Integer.MAX_VALUE)
          incr((int) diff);
        else
          // change from TODAY to LITERAL

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        adjustment);
  }
  
  // convert "difficult" calendars to Day and increase resolution to milliseconds
  private static long yearOrMonthToMillisecSinceEpoch (long year, int month) throws T2Exception {
    TimeIndex m = Day.DOMAIN.time(year, month, 1, 0, 0, 0, 0, Adjustment.NONE);
    long index = m.asLong() * 24L * 3600000L;
    return index = index - epoch;
  }

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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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      int compareResols = getTimeDomain().getResolution().compareTo(otherTime.getTimeDomain().getResolution());
      if (compareResols == 0) {
        // convert  both to unrestricted domain
        TimeDomainDefinition def = new TimeDomainDefinition(null, getTimeDomain().getResolution(), 0L);
        TimeDomain unrestrictedDomain = TimeDomainManager.getFactory().get(def, true);
        TimeIndex converted = convertOrThrowRTE(unrestrictedDomain, this);
        TimeIndex otherConverted = convertOrThrowRTE(unrestrictedDomain, otherTime);
        return converted.compareTo(otherConverted);
      } else if (compareResols < 0) {
        // convert  both to highest resolution
        TimeDomainDefinition def = new TimeDomainDefinition(null, otherTime.getTimeDomain().getResolution(), 0L);
        TimeDomain unrestrictedDomain = TimeDomainManager.getFactory().get(def, true);
        TimeIndex converted = convertOrThrowRTE(unrestrictedDomain, this);
        return converted.compareTo(otherTime);
      } else {
        // convert  both to highest resolution
        TimeDomainDefinition def = new TimeDomainDefinition(null, getTimeDomain().getResolution(), 0L);
        TimeDomain unrestrictedDomain = TimeDomainManager.getFactory().get(def, true);
        TimeIndex otherConverted = convertOrThrowRTE(unrestrictedDomain, otherTime);
        return compareTo(otherConverted);
      }
    }
  }

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  }
  
  public void test_02() {
    try {
      UpdatableSeries<Double> s = db.getUpdatableSeries(SERIES, true).typeCheck(Double.class);
      TimeIndex t = s.getTimeDomain().time("2011-03-08");
      s.scanValue(t, "42");
      assertEquals(42.0, s.getValue(t));
    } catch (Exception e) {
      fail(e.toString());
    }

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