public class CountAggregator extends AggregatorNode
GroupingExpression
. It evaluates to the number of elements
there are in the input.Constructor and Description |
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CountAggregator()
Constructs a new instance of this class.
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Modifier and Type | Method and Description |
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CountAggregator |
copy()
Returns a deep copy of this
|
getExpression, resolveLevel, visit
asImage, asString, getLevel, getLevelOrNull, setLabel
getImage, getLabel, toString
public CountAggregator()
public CountAggregator copy()
GroupingExpression
copy
in class GroupingExpression
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