Package com.espertech.esper.common.internal.epl.agg.core
package com.espertech.esper.common.internal.epl.agg.core
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ClassDescriptionFor handling access aggregation functions "first, last, window" a pair of slow and accessorForge.Factory for aggregation methods.Interface for use by aggregate expression nodes representing aggregate functions such as 'sum' or 'avg' to use to obtain the current value for the function at time of expression evaluation.Service for maintaining aggregation state.Factory for aggregation service instances.Factory for aggregation service instances.A null object implementation of the AggregationService interface.A null object implementation of the AggregationService interface.Implementation for handling aggregation with grouping by group-keys.