ObjectAggregateCombiner (druid-processing 28.0.0 API)

java.lang.Object
- org.apache.druid.segment.ObjectColumnSelector<T>
- - org.apache.druid.query.aggregation.ObjectAggregateCombiner<T>

All Implemented Interfaces:

AggregateCombiner<T>, HotLoopCallee, BaseDoubleColumnValueSelector, BaseFloatColumnValueSelector, BaseLongColumnValueSelector, BaseNullableColumnValueSelector, BaseObjectColumnValueSelector<T>, ColumnValueSelector<T>

Direct Known Subclasses:

HyperLogLogCollectorAggregateCombiner, StringFirstAggregateCombiner, StringLastAggregateCombiner
```
public abstract class ObjectAggregateCombiner<T>
extends ObjectColumnSelector<T>
implements AggregateCombiner<T>
```
Specialization of AggregateCombiner for object aggregations.

- Field Summary
  - Fields inherited from interface org.apache.druid.segment.ColumnValueSelector
    EMPTY_ARRAY
- Constructor Summary
  
  Constructors
  Constructor Description
  
  ObjectAggregateCombiner()
- Method Summary
  - Methods inherited from class org.apache.druid.segment.ObjectColumnSelector
    getDouble, getFloat, getLong, isNull
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
  - Methods inherited from interface org.apache.druid.query.aggregation.AggregateCombiner
    fold, inspectRuntimeShape, isNull, reset
  - Methods inherited from interface org.apache.druid.segment.BaseDoubleColumnValueSelector
    getDouble
  - Methods inherited from interface org.apache.druid.segment.BaseFloatColumnValueSelector
    getFloat
  - Methods inherited from interface org.apache.druid.segment.BaseLongColumnValueSelector
    getLong
  - Methods inherited from interface org.apache.druid.segment.BaseObjectColumnValueSelector
    classOfObject, getObject

- Constructor Detail
  - ObjectAggregateCombiner
```
public ObjectAggregateCombiner()
```