public abstract class FieldAggregator extends Object implements Serializable
Modifier and Type | Field and Description |
---|---|
protected DataType |
fieldType |
protected String |
name |
Constructor and Description |
---|
FieldAggregator(String name,
DataType dataType) |
Modifier and Type | Method and Description |
---|---|
abstract Object |
agg(Object accumulator,
Object inputField) |
Object |
aggReversed(Object accumulator,
Object inputField) |
void |
reset()
reset the aggregator to a clean start state.
|
Object |
retract(Object accumulator,
Object retractField) |
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