AggregationMethod (Esper API Documentation)

All Known Implementing Classes:

AggregatorAvedev, AggregatorAvedevFilter, AggregatorAvg, AggregatorAvgBigDecimal, AggregatorAvgBigDecimalFilter, AggregatorAvgFilter, AggregatorCount, AggregatorCountEver, AggregatorCountEverFilter, AggregatorCountEverNonNull, AggregatorCountEverNonNullFilter, AggregatorCountFilter, AggregatorCountNonNull, AggregatorCountNonNullFilter, AggregatorDistinctValue, AggregatorDistinctValueFilter, AggregatorFirstEver, AggregatorFirstEverFilter, AggregatorLastEver, AggregatorLastEverFilter, AggregatorLeaving, AggregatorLeavingFilter, AggregatorMedian, AggregatorMedianFilter, AggregatorMinMax, AggregatorMinMaxEver, AggregatorMinMaxEverFilter, AggregatorMinMaxFilter, AggregatorNth, AggregatorNthFilter, AggregatorRate, AggregatorRateEver, AggregatorRateEverFilter, AggregatorRateFilter, AggregatorStddev, AggregatorStddevFilter, AggregatorSumBigDecimal, AggregatorSumBigDecimalFilter, AggregatorSumBigInteger, AggregatorSumBigIntegerFilter, AggregatorSumDouble, AggregatorSumDoubleFilter, AggregatorSumFloat, AggregatorSumFloatFilter, AggregatorSumInteger, AggregatorSumIntegerFilter, AggregatorSumLong, AggregatorSumLongFilter, AggregatorSumNumInteger, AggregatorSumNumIntegerFilter
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public interface AggregationMethod
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Maintains aggregation state applying values as entering and leaving the state.
Implementations must also act as a factory for further independent copies of aggregation states such that new aggregation state holders and be created from a prototype.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method and Description
`void`	`clear()` Clear out the collection.
`void`	`enter(Object value)` Apply the value as entering aggregation (entering window).
`Object`	`getValue()` Returns the current value held.
`void`	`leave(Object value)` Apply the value as leaving aggregation (leaving window).

- Method Detail
  - enter
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void enter(Object value)
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    Apply the value as entering aggregation (entering window).
    The value can be null since 'null' values may be counted as unique separate values.
    
    Parameters:
    
    value - to add to aggregate
  - leave
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void leave(Object value)
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    Apply the value as leaving aggregation (leaving window).
    The value can be null since 'null' values may be counted as unique separate values.
    
    Parameters:
    
    value - to remove from aggregate
  - getValue
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Object getValue()
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    Returns the current value held.
    
    Returns:
    
    current value
  - clear
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void clear()
```
    Clear out the collection.

Interface AggregationMethod

Method Summary

Method Detail

enter

leave

getValue

clear