How to use

IncrementalIndex$MetricDesc

in

org.apache.druid.segment.incremental

MetricDesc metricDesc = new MetricDesc(metricDescs.size(), metric);
metricDescs.put(metricDesc.getName(), metricDesc);
columnCapabilities.put(metricDesc.getName(), metricDesc.getCapabilities());

@Nullable
public String getMetricType(String metric)
{
 final MetricDesc metricDesc = metricDescs.get(metric);
 return metricDesc != null ? metricDesc.getType() : null;
}

MetricDesc metricDesc = new MetricDesc(metricDescs.size(), metric);
metricDescs.put(metricDesc.getName(), metricDesc);
columnCapabilities.put(metricDesc.getName(), metricDesc.getCapabilities());

public ColumnValueSelector<?> makeMetricColumnValueSelector(String metric, IncrementalIndexRowHolder currEntry)
{
 MetricDesc metricDesc = metricDescs.get(metric);
 if (metricDesc == null) {
  return NilColumnValueSelector.instance();
 }
 int metricIndex = metricDesc.getIndex();
 switch (metricDesc.getCapabilities().getType()) {
  case COMPLEX:
   return new ObjectMetricColumnSelector(metricDesc, currEntry, metricIndex);
  case LONG:
   return new LongMetricColumnSelector(currEntry, metricIndex);
  case FLOAT:
   return new FloatMetricColumnSelector(currEntry, metricIndex);
  case DOUBLE:
   return new DoubleMetricColumnSelector(currEntry, metricIndex);
  case STRING:
   throw new IllegalStateException("String is not a metric column type");
  default:
   throw new ISE("Unknown metric value type: %s", metricDesc.getCapabilities().getType());
 }
}

@Nullable
public String getMetricType(String metric)
{
 final MetricDesc metricDesc = metricDescs.get(metric);
 return metricDesc != null ? metricDesc.getType() : null;
}

public ColumnValueSelector<?> makeMetricColumnValueSelector(String metric, IncrementalIndexRowHolder currEntry)
{
 MetricDesc metricDesc = metricDescs.get(metric);
 if (metricDesc == null) {
  return NilColumnValueSelector.instance();
 }
 int metricIndex = metricDesc.getIndex();
 switch (metricDesc.getCapabilities().getType()) {
  case COMPLEX:
   return new ObjectMetricColumnSelector(metricDesc, currEntry, metricIndex);
  case LONG:
   return new LongMetricColumnSelector(currEntry, metricIndex);
  case FLOAT:
   return new FloatMetricColumnSelector(currEntry, metricIndex);
  case DOUBLE:
   return new DoubleMetricColumnSelector(currEntry, metricIndex);
  case STRING:
   throw new IllegalStateException("String is not a metric column type");
  default:
   throw new ISE("Unknown metric value type: %s", metricDesc.getCapabilities().getType());
 }
}