/**************************************************************************************
* Copyright (C) 2008 EsperTech, Inc. All rights reserved. *
* http://esper.codehaus.org *
* http://www.espertech.com *
* ---------------------------------------------------------------------------------- *
* The software in this package is published under the terms of the GPL license *
* a copy of which has been included with this distribution in the license.txt file. *
**************************************************************************************/
package com.espertech.esper.epl.agg.service;
import com.espertech.esper.core.context.util.AgentInstanceContext;
import com.espertech.esper.epl.agg.aggregator.AggregationMethod;
import com.espertech.esper.epl.expression.ExprEvaluator;
import java.util.LinkedHashMap;
import java.util.Map;
/**
* Implements an aggregation service for match recognize.
*/
public class AggregationServiceMatchRecognizeFactoryImpl implements AggregationServiceMatchRecognizeFactory
{
private ExprEvaluator evaluatorsEachStream[][];
private AggregationMethodFactory factoryEachStream[][];
/**
* Ctor.
* @param countStreams number of streams/variables
* @param aggregatorsPerStream aggregation methods per stream
* @param evaluatorsPerStream evaluation functions per stream
*/
public AggregationServiceMatchRecognizeFactoryImpl(int countStreams, LinkedHashMap<Integer, AggregationMethodFactory[]> aggregatorsPerStream, Map<Integer, ExprEvaluator[]> evaluatorsPerStream) {
evaluatorsEachStream = new ExprEvaluator[countStreams][];
factoryEachStream = new AggregationMethodFactory[countStreams][];
for (Map.Entry<Integer, AggregationMethodFactory[]> agg : aggregatorsPerStream.entrySet())
{
factoryEachStream[agg.getKey()] = agg.getValue();
}
for (Map.Entry<Integer, ExprEvaluator[]> eval : evaluatorsPerStream.entrySet())
{
evaluatorsEachStream[eval.getKey()] = eval.getValue();
}
}
public AggregationServiceMatchRecognize makeService(AgentInstanceContext agentInstanceContext) {
AggregationMethod aggregatorsEachStream[][] = new AggregationMethod[factoryEachStream.length][];
int count = 0;
for (int stream = 0; stream < factoryEachStream.length; stream++) {
AggregationMethodFactory[] thatStream = factoryEachStream[stream];
if (thatStream != null) {
aggregatorsEachStream[stream] = new AggregationMethod[thatStream.length];
for (int aggId = 0; aggId < thatStream.length; aggId++) {
aggregatorsEachStream[stream][aggId] = factoryEachStream[stream][aggId].make(agentInstanceContext.getStatementContext().getMethodResolutionService(), agentInstanceContext.getAgentInstanceId(), 0, aggId);
count++;
}
}
}
AggregationMethod[] aggregatorsAll = new AggregationMethod[count];
count = 0;
for (int stream = 0; stream < factoryEachStream.length; stream++) {
if (factoryEachStream[stream] != null) {
for (int aggId = 0; aggId < factoryEachStream[stream].length; aggId++) {
aggregatorsAll[count] = aggregatorsEachStream[stream][aggId];
count++;
}
}
}
return new AggregationServiceMatchRecognizeImpl(evaluatorsEachStream, aggregatorsEachStream, aggregatorsAll);
}
}