/*
***************************************************************************************
* Copyright (C) 2006 EsperTech, Inc. All rights reserved. *
* http://www.espertech.com/esper *
* 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.access;
import com.espertech.esper.client.EventBean;
import com.espertech.esper.epl.expression.core.ExprEvaluator;
import com.espertech.esper.epl.expression.core.ExprEvaluatorContext;
/**
* Implementation of access function for joins.
*/
public class AggregationStateLinearJoinWFilter extends AggregationStateLinearJoinImpl {
private ExprEvaluator filterEval;
public AggregationStateLinearJoinWFilter(int streamId, ExprEvaluator filterEval) {
super(streamId);
this.filterEval = filterEval;
}
@Override
public void applyEnter(EventBean[] eventsPerStream, ExprEvaluatorContext exprEvaluatorContext) {
EventBean theEvent = eventsPerStream[streamId];
if (theEvent == null) {
return;
}
Boolean pass = (Boolean) filterEval.evaluate(eventsPerStream, true, exprEvaluatorContext);
if (pass != null && pass) {
super.addEvent(theEvent);
}
}
@Override
public void applyLeave(EventBean[] eventsPerStream, ExprEvaluatorContext exprEvaluatorContext) {
EventBean theEvent = eventsPerStream[streamId];
if (theEvent == null) {
return;
}
Boolean pass = (Boolean) filterEval.evaluate(eventsPerStream, true, exprEvaluatorContext);
if (pass != null && pass) {
super.removeEvent(theEvent);
}
}
}