How to use

fromPeriod

method

in

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

@Override
public DateTimeFormatter getFormatter(Formatter type)
{
 GranularityType granularityType = GranularityType.fromPeriod(period);
 switch (type) {
  case DEFAULT:
   return DateTimeFormat.forPattern(granularityType.getDefaultFormat());
  case HIVE:
   return DateTimeFormat.forPattern(granularityType.getHiveFormat());
  case LOWER_DEFAULT:
   return DateTimeFormat.forPattern(granularityType.getLowerDefaultFormat());
  default:
   throw new IAE("There is no format for type %s", type);
 }
}

@Override
public void serialize(JsonGenerator jsonGenerator, SerializerProvider serializerProvider)
  throws IOException
{
 // Retain the same behavior as before #3850.
 // i.e. when Granularity class was an enum.
 if (GranularityType.isStandard(this)) {
  jsonGenerator.writeString(GranularityType.fromPeriod(getPeriod()).toString());
 } else {
  jsonGenerator.writeStartObject();
  jsonGenerator.writeStringField("type", "period");
  jsonGenerator.writeObjectField("period", getPeriod());
  jsonGenerator.writeObjectField("timeZone", getTimeZone());
  jsonGenerator.writeObjectField("origin", getOrigin());
  jsonGenerator.writeEndObject();
 }
}

@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;
}

  dimensionsSpec,
  metricsSpec,
  GranularityType.fromPeriod(interval.toPeriod()).getDefaultGranularity(),
  jsonMapper
);

@Test
public void testCustomNestedPeriodFail()
{
 try {
  Period p = Period.years(6).withMonths(3).withSeconds(23);
  GranularityType.fromPeriod(p);
  Assert.fail("Complicated period creation should fail b/c of unsupported granularity type.");
 }
 catch (IAE e) {
  // pass
 }
}

@Override
public DateTimeFormatter getFormatter(Formatter type)
{
 GranularityType granularityType = GranularityType.fromPeriod(period);
 switch (type) {
  case DEFAULT:
   return DateTimeFormat.forPattern(granularityType.getDefaultFormat());
  case HIVE:
   return DateTimeFormat.forPattern(granularityType.getHiveFormat());
  case LOWER_DEFAULT:
   return DateTimeFormat.forPattern(granularityType.getLowerDefaultFormat());
  default:
   throw new IAE("There is no format for type %s", type);
 }
}

@Override
public void serialize(
  JsonGenerator jsonGenerator, SerializerProvider serializerProvider
) throws IOException, JsonProcessingException
{
 // Retain the same behavior as before #3850.
 // i.e. when Granularity class was an enum.
 if (GranularityType.isStandard(this)) {
  jsonGenerator.writeString(GranularityType.fromPeriod(getPeriod()).toString());
 } else {
  jsonGenerator.writeStartObject();
  jsonGenerator.writeStringField("type", "period");
  jsonGenerator.writeObjectField("period", getPeriod());
  jsonGenerator.writeObjectField("timeZone", getTimeZone());
  jsonGenerator.writeObjectField("origin", getOrigin());
  jsonGenerator.writeEndObject();
 }
}

@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;
}