CountAggregator (container-search 7.87.44 API)

java.lang.Object
- com.yahoo.search.grouping.request.GroupingNode
- - com.yahoo.search.grouping.request.GroupingExpression
  - - com.yahoo.search.grouping.request.AggregatorNode
    - - com.yahoo.search.grouping.request.CountAggregator

```
public class CountAggregator
extends AggregatorNode
```
This class represents an count-aggregator in a GroupingExpression. It evaluates to the number of elements there are in the input.

Author:

Simon Thoresen Hult, bratseth

- Constructor Summary
  
  Constructors
  Constructor Description
  
  CountAggregator()
  Constructs a new instance of this class.
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  
  CountAggregator copy()
  Returns a deep copy of this
  - Methods inherited from class com.yahoo.search.grouping.request.AggregatorNode
    getExpression, resolveLevel, visit
  - Methods inherited from class com.yahoo.search.grouping.request.GroupingExpression
    asImage, asString, getLevel, getLevelOrNull, setLabel
  - Methods inherited from class com.yahoo.search.grouping.request.GroupingNode
    getImage, getLabel, toString
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - CountAggregator
```
public CountAggregator()
```
    Constructs a new instance of this class.
- Method Detail
  - copy
```
public CountAggregator copy()
```
    Description copied from class: GroupingExpression
    
    Returns a deep copy of this
    
    Specified by:
    
    copy in class GroupingExpression