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java.lang.Objectcom.espertech.esper.epl.agg.aggregator.AggregatorFirstEver
com.espertech.esper.epl.agg.aggregator.AggregatorFirstEverFilter
public class AggregatorFirstEverFilter
Aggregator for the very first value.
Field Summary |
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Fields inherited from class com.espertech.esper.epl.agg.aggregator.AggregatorFirstEver |
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firstValue, isSet, type |
Constructor Summary | |
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AggregatorFirstEverFilter(java.lang.Class type)
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Method Summary | |
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void |
enter(java.lang.Object parameters)
Apply the value as entering aggregation (entering window). |
void |
leave(java.lang.Object parameters)
Apply the value as leaving aggregation (leaving window). |
Methods inherited from class com.espertech.esper.epl.agg.aggregator.AggregatorFirstEver |
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clear, getFirstValue, getValue, getValueType, isSet, setFirstValue, setSet |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public AggregatorFirstEverFilter(java.lang.Class type)
Method Detail |
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public void enter(java.lang.Object parameters)
AggregationMethod
The value can be null since 'null' values may be counted as unique separate values.
enter
in interface AggregationMethod
enter
in class AggregatorFirstEver
parameters
- to add to aggregatepublic void leave(java.lang.Object parameters)
AggregationMethod
The value can be null since 'null' values may be counted as unique separate values.
leave
in interface AggregationMethod
leave
in class AggregatorFirstEver
parameters
- to remove from aggregate
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