| Class | Description | 
|---|---|
| AbstractAggregator<I,R> | Abstract class providing convenience for concrete implementations of an  AggregatorIt also provides the extract() method that enables extracting values of the given attributePath from the input. | 
| BigDecimalAverageAggregator<I> | |
| BigDecimalSumAggregator<I> | |
| BigIntegerAverageAggregator<I> | |
| BigIntegerSumAggregator<I> | |
| CountAggregator<I> | |
| DistinctValuesAggregator<I,R> | |
| DoubleAverageAggregator<I> | |
| DoubleSumAggregator<I> | |
| FixedSumAggregator<I> | |
| FloatingPointSumAggregator<I> | |
| IntegerAverageAggregator<I> | |
| IntegerSumAggregator<I> | |
| LongAverageAggregator<I> | |
| LongSumAggregator<I> | |
| MaxAggregator<I,R extends Comparable> | |
| MinAggregator<I,R extends Comparable> | |
| NumberAverageAggregator<I> | 
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