Package com.yahoo.search.grouping.request

Class CountAggregator

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

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 Details

CountAggregator

public CountAggregator()

Constructs a new instance of this class.

Method Details

copy

public CountAggregator copy()

Description copied from class: GroupingExpression

Returns a deep copy of this

Specified by:

copy in class GroupingExpression