How to use

bucketStart

method

in

org.apache.druid.java.util.common.granularity.PeriodGranularity

@Nonnull
@Override
public ExprEval eval(final ObjectBinding bindings)
{
 final PeriodGranularity granularity = computeGranularity(args, bindings);
 return ExprEval.of(granularity.bucketStart(DateTimes.utc(args.get(0).eval(bindings).asLong())).getMillis());
}

@Override
public DateTime toDate(String filePath, Formatter formatter)
{
 Integer[] vals = getDateValues(filePath, formatter);
 GranularityType granularityType = GranularityType.fromPeriod(period);
 DateTime date = granularityType.getDateTime(vals);
 if (date != null) {
  return bucketStart(date);
 }
 return null;
}

@Nonnull
@Override
public ExprEval eval(final ObjectBinding bindings)
{
 ExprEval eval = arg.eval(bindings);
 if (eval.isNumericNull()) {
  // Return null if the argument if null.
  return ExprEval.of(null);
 }
 return ExprEval.of(granularity.bucketStart(DateTimes.utc(eval.asLong())).getMillis());
}

@Test
public void testTruncateKathmandu()
{
 final DateTimeZone tz = DateTimeZone.forTimeZone(TimeZone.getTimeZone("Asia/Kathmandu"));
 final DateTime date = new DateTime("2011-03-15T21:42:23.898+05:45", tz);
 final PeriodGranularity year = new PeriodGranularity(new Period("P1Y"), null, tz);
 final PeriodGranularity hour = new PeriodGranularity(new Period("PT1H"), null, tz);
 final PeriodGranularity twoHour = new PeriodGranularity(new Period("PT2H"), null, tz);
 Assert.assertEquals(
   new DateTime("2011-01-01T00:00:00.000+05:45", tz),
   year.toDateTime(year.bucketStart(date).getMillis())
 );
 Assert.assertEquals(
   new DateTime("2011-03-15T21:00:00.000+05:45", tz),
   hour.toDateTime(hour.bucketStart(date).getMillis())
 );
 Assert.assertEquals(
   new DateTime("2011-03-15T20:00:00.000+05:45", tz),
   twoHour.toDateTime(twoHour.bucketStart(date).getMillis())
 );
}

@Test
public void testTruncateDhaka()
{
 final DateTimeZone tz = DateTimeZone.forTimeZone(TimeZone.getTimeZone("Asia/Dhaka"));
 final DateTime date = new DateTime("2011-03-15T21:42:23.898+06:00", tz);
 final PeriodGranularity year = new PeriodGranularity(new Period("P1Y"), null, tz);
 final PeriodGranularity hour = new PeriodGranularity(new Period("PT1H"), null, tz);
 final PeriodGranularity twoHour = new PeriodGranularity(new Period("PT2H"), null, tz);
 Assert.assertEquals(
   new DateTime("2011-01-01T00:00:00.000+06:00", tz),
   year.toDateTime(year.bucketStart(date).getMillis())
 );
 Assert.assertEquals(
   new DateTime("2011-03-15T21:00:00.000+06:00", tz),
   hour.toDateTime(hour.bucketStart(date).getMillis())
 );
 Assert.assertEquals(
   new DateTime("2011-03-15T20:00:00.000+06:00", tz),
   twoHour.toDateTime(twoHour.bucketStart(date).getMillis())
 );
}

),
Lists.newArrayList(
  periodOrigin.bucketStart(DateTimes.of("2012-01-01T05:00:04.123-08:00")),
  periodOrigin.bucketStart(DateTimes.of("2012-01-02T07:00:04.123-08:00")),
  periodOrigin.bucketStart(DateTimes.of("2012-01-04T07:20:04.123-08:00"))
),
Lists.newArrayList(
  periodNoOrigin.bucketStart(DateTimes.of("2012-01-01T05:00:04.123-08:00")),
  periodNoOrigin.bucketStart(DateTimes.of("2012-01-02T07:00:04.123-08:00")),
  periodNoOrigin.bucketStart(DateTimes.of("2012-01-04T07:20:04.123-08:00"))

),
Lists.newArrayList(
  periodOrigin.bucketStart(DateTimes.of("2012-01-01T05:00:04.123-08:00")),
  periodOrigin.bucketStart(DateTimes.of("2012-01-02T07:00:04.123-08:00")),
  periodOrigin.bucketStart(DateTimes.of("2012-03-01T07:20:04.123-08:00")),
  periodOrigin.bucketStart(DateTimes.of("2012-02-04T05:00:00.000-08:00"))
),
Lists.newArrayList(
  periodNoOrigin.bucketStart(DateTimes.of("1970-01-01T05:02:04.123-08:00")),
  periodNoOrigin.bucketStart(DateTimes.of("2012-01-01T05:02:04.123-08:00")),
  periodNoOrigin.bucketStart(DateTimes.of("2012-01-15T07:01:04.123-08:00")),
  periodNoOrigin.bucketStart(DateTimes.of("2012-02-16T00:00:00.000-08:00"))
),
Lists.newArrayList(
  periodOrigin.bucketStart(DateTimes.of("2012-01-01T05:00:04.123-08:00")),
  periodOrigin.bucketStart(DateTimes.of("2012-01-02T07:00:04.123-08:00")),
  periodOrigin.bucketStart(DateTimes.of("2012-01-03T00:20:04.123-08:00")),
  periodOrigin.bucketStart(DateTimes.of("2012-02-03T22:25:00.000-08:00"))

),
Lists.newArrayList(
  hour.bucketStart(DateTimes.of("2012-11-04T00:30:00-07:00")),
  hour.bucketStart(DateTimes.of("2012-11-04T01:30:00-07:00")),
  hour.bucketStart(DateTimes.of("2012-11-04T01:30:00-08:00")),
  hour.bucketStart(DateTimes.of("2012-11-04T02:30:00-08:00")),
  hour.bucketStart(DateTimes.of("2012-11-04T03:30:00-08:00"))

@Test
public void testCompoundPeriodMillisTruncate()
{
 {
  final DateTime origin = DateTimes.of("2012-01-02T05:00:00.000-08:00");
  PeriodGranularity periodOrigin = new PeriodGranularity(
    new Period("PT12H5M"),
    origin,
    DateTimeZone.UTC
  );
  assertSameDateTime(
    Lists.newArrayList(
      DateTimes.of("2012-01-01T04:50:00.000-08:00"),
      DateTimes.of("2012-01-02T05:00:00.000-08:00"),
      DateTimes.of("2012-01-02T17:05:00.000-08:00"),
      DateTimes.of("2012-02-03T22:25:00.000-08:00")
    ),
    Lists.newArrayList(
      periodOrigin.bucketStart(DateTimes.of("2012-01-01T05:00:04.123-08:00")),
      periodOrigin.bucketStart(DateTimes.of("2012-01-02T07:00:04.123-08:00")),
      periodOrigin.bucketStart(DateTimes.of("2012-01-03T00:20:04.123-08:00")),
      periodOrigin.bucketStart(DateTimes.of("2012-02-03T22:25:00.000-08:00"))
    )
  );
 }
}

),
Lists.newArrayList(
  periodOrigin.bucketStart(DateTimes.of("2012-01-01T05:00:04.123Z")),
  periodOrigin.bucketStart(DateTimes.of("2012-01-02T07:08:04.123Z")),
  periodOrigin.bucketStart(DateTimes.of("2012-01-04T00:20:04.123Z"))
),
Lists.newArrayList(
  periodNoOrigin.bucketStart(DateTimes.of("2012-01-01T05:00:04.123Z")),
  periodNoOrigin.bucketStart(DateTimes.of("2012-01-02T07:00:04.123Z")),
  periodNoOrigin.bucketStart(DateTimes.of("2012-01-04T00:20:04.123Z"))

@Nonnull
@Override
public ExprEval eval(final ObjectBinding bindings)
{
 final PeriodGranularity granularity = computeGranularity(args, bindings);
 return ExprEval.of(granularity.bucketStart(DateTimes.utc(args.get(0).eval(bindings).asLong())).getMillis());
}

@Override
public DateTime toDate(String filePath, Formatter formatter)
{
 Integer[] vals = getDateValues(filePath, formatter);
 GranularityType granularityType = GranularityType.fromPeriod(period);
 DateTime date = granularityType.getDateTime(vals);
 if (date != null) {
  return bucketStart(date);
 }
 return null;
}

@Nonnull
@Override
public ExprEval eval(final ObjectBinding bindings)
{
 ExprEval eval = arg.eval(bindings);
 if (eval.isNumericNull()) {
  // Return null if the argument if null.
  return ExprEval.of(null);
 }
 return ExprEval.of(granularity.bucketStart(DateTimes.utc(eval.asLong())).getMillis());
}