com.espertech.esper.common.client.hook.aggmultifunc

Interface AggregationMultiFunctionTableReader

public interface AggregationMultiFunctionTableReader

Reader for aggregation multi-function state held by a table column.

Method Summary

Modifier and Type	Method and Description
java.lang.Object	getValue(int aggColNum, com.espertech.esper.common.internal.epl.agg.core.AggregationRow row, EventBean[] eventsPerStream, boolean isNewData, com.espertech.esper.common.internal.epl.expression.core.ExprEvaluatorContext exprEvaluatorContext) Returns the plain value
java.util.Collection	getValueCollectionEvents(int aggColNum, com.espertech.esper.common.internal.epl.agg.core.AggregationRow row, EventBean[] eventsPerStream, boolean isNewData, com.espertech.esper.common.internal.epl.expression.core.ExprEvaluatorContext exprEvaluatorContext) Return a collection of events or null when not available.
java.util.Collection	getValueCollectionScalar(int aggColNum, com.espertech.esper.common.internal.epl.agg.core.AggregationRow row, EventBean[] eventsPerStream, boolean isNewData, com.espertech.esper.common.internal.epl.expression.core.ExprEvaluatorContext exprEvaluatorContext) Return a collection of values or null when not available.
EventBean	getValueEventBean(int aggColNum, com.espertech.esper.common.internal.epl.agg.core.AggregationRow row, EventBean[] eventsPerStream, boolean isNewData, com.espertech.esper.common.internal.epl.expression.core.ExprEvaluatorContext exprEvaluatorContext) Returns a single event or null when not available.

Method Detail

getValue

java.lang.Object getValue(int aggColNum,
                          com.espertech.esper.common.internal.epl.agg.core.AggregationRow row,
                          EventBean[] eventsPerStream,
                          boolean isNewData,
                          com.espertech.esper.common.internal.epl.expression.core.ExprEvaluatorContext exprEvaluatorContext)

Returns the plain value

Parameters:

aggColNum - column number

row - aggregation row

eventsPerStream - events

isNewData - new-data flag

exprEvaluatorContext - evaluation context

Returns:

value

getValueCollectionEvents

java.util.Collection getValueCollectionEvents(int aggColNum,
                                              com.espertech.esper.common.internal.epl.agg.core.AggregationRow row,
                                              EventBean[] eventsPerStream,
                                              boolean isNewData,
                                              com.espertech.esper.common.internal.epl.expression.core.ExprEvaluatorContext exprEvaluatorContext)

Return a collection of events or null when not available. The EPType returned by the handler indicates whether the compiler allows operations on events.

Parameters:

aggColNum - column number

row - aggregation row

eventsPerStream - events

isNewData - new-data flag

exprEvaluatorContext - evaluation context

Returns:

collection of EventBean

getValueCollectionScalar

java.util.Collection getValueCollectionScalar(int aggColNum,
                                              com.espertech.esper.common.internal.epl.agg.core.AggregationRow row,
                                              EventBean[] eventsPerStream,
                                              boolean isNewData,
                                              com.espertech.esper.common.internal.epl.expression.core.ExprEvaluatorContext exprEvaluatorContext)

Return a collection of values or null when not available. The EPType returned by the handler indicates whether the compiler allows operations on events.

Parameters:

aggColNum - column number

row - aggregation row

eventsPerStream - events

isNewData - new-data flag

exprEvaluatorContext - evaluation context

Returns:

collection of values

getValueEventBean

EventBean getValueEventBean(int aggColNum,
                            com.espertech.esper.common.internal.epl.agg.core.AggregationRow row,
                            EventBean[] eventsPerStream,
                            boolean isNewData,
                            com.espertech.esper.common.internal.epl.expression.core.ExprEvaluatorContext exprEvaluatorContext)

Returns a single event or null when not available. The EPType returned by the handler indicates whether the compiler allows operations on events.

Parameters:

aggColNum - column number

row - aggregation row

eventsPerStream - events

isNewData - new-data flag

exprEvaluatorContext - evaluation context

Returns:

event