/*
* *************************************************************************************
* 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.core.context.stmt;
import com.espertech.esper.client.EventBean;
import com.espertech.esper.epl.expression.ExprEvaluatorContext;
import com.espertech.esper.epl.expression.ExprPreviousEvalStrategy;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
public class AIRegistryPreviousMap implements AIRegistryPrevious, ExprPreviousEvalStrategy {
private final Map<Integer, ExprPreviousEvalStrategy> strategies;
public AIRegistryPreviousMap() {
strategies = new HashMap<Integer, ExprPreviousEvalStrategy>();
}
public void assignService(int num, ExprPreviousEvalStrategy value) {
strategies.put(num, value);
}
public void deassignService(int num) {
strategies.remove(num);
}
public int getAgentInstanceCount() {
return strategies.size();
}
public Object evaluate(EventBean[] eventsPerStream, ExprEvaluatorContext exprEvaluatorContext) {
int agentInstanceId = exprEvaluatorContext.getAgentInstanceId();
ExprPreviousEvalStrategy strategy = strategies.get(agentInstanceId);
return strategy.evaluate(eventsPerStream, exprEvaluatorContext);
}
public Collection<EventBean> evaluateGetCollEvents(EventBean[] eventsPerStream, ExprEvaluatorContext context) {
int agentInstanceId = context.getAgentInstanceId();
ExprPreviousEvalStrategy strategy = strategies.get(agentInstanceId);
return strategy.evaluateGetCollEvents(eventsPerStream, context);
}
public Collection evaluateGetCollScalar(EventBean[] eventsPerStream, ExprEvaluatorContext context) {
int agentInstanceId = context.getAgentInstanceId();
ExprPreviousEvalStrategy strategy = strategies.get(agentInstanceId);
return strategy.evaluateGetCollScalar(eventsPerStream, context);
}
public EventBean evaluateGetEventBean(EventBean[] eventsPerStream, ExprEvaluatorContext context) {
int agentInstanceId = context.getAgentInstanceId();
ExprPreviousEvalStrategy strategy = strategies.get(agentInstanceId);
return strategy.evaluateGetEventBean(eventsPerStream, context);
}
}