/*
* *************************************************************************************
* 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.rowregex;
import com.espertech.esper.client.EventBean;
import com.espertech.esper.epl.expression.ExprEvaluator;
import com.espertech.esper.epl.expression.ExprEvaluatorContext;
import com.espertech.esper.epl.expression.ExprNode;
/**
* NFA state for a single match that applies a filter.
*/
public class RegexNFAStateFilter extends RegexNFAStateBase implements RegexNFAState
{
private ExprEvaluator exprNode;
/**
* Ctor.
* @param nodeNum node num
* @param variableName variable name
* @param streamNum stream number
* @param multiple true for multiple matches
* @param exprNode filter expression
*/
public RegexNFAStateFilter(String nodeNum, String variableName, int streamNum, boolean multiple, ExprNode exprNode)
{
super(nodeNum, variableName, streamNum, multiple, null);
this.exprNode = exprNode.getExprEvaluator();
}
public boolean matches(EventBean[] eventsPerStream, ExprEvaluatorContext exprEvaluatorContext)
{
Boolean result = (Boolean) exprNode.evaluate(eventsPerStream, true, exprEvaluatorContext);
if (result != null)
{
return result;
}
return false;
}
public String toString()
{
return "FilterEvent";
}
}