/*
***************************************************************************************
* 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.regression.client;
import com.espertech.esper.pattern.observer.EventObserver;
import com.espertech.esper.pattern.observer.EventObserverVisitor;
import com.espertech.esper.pattern.observer.ObserverEventEvaluator;
import com.espertech.esper.pattern.MatchedEventMap;
import java.io.File;
public class MyFileExistsObserver implements EventObserver
{
private final MatchedEventMap beginState;
private final ObserverEventEvaluator observerEventEvaluator;
private final String filename;
public MyFileExistsObserver(MatchedEventMap beginState, ObserverEventEvaluator observerEventEvaluator, String filename)
{
this.beginState = beginState;
this.observerEventEvaluator = observerEventEvaluator;
this.filename = filename;
}
public MatchedEventMap getBeginState() {
return beginState;
}
public void startObserve()
{
File file = new File(filename);
if (file.exists())
{
observerEventEvaluator.observerEvaluateTrue(beginState, true);
}
else
{
observerEventEvaluator.observerEvaluateFalse(true);
}
}
public void stopObserve()
{
// this is called when the subexpression quits or the pattern is stopped
// no action required
}
public void accept(EventObserverVisitor visitor) {
}
}