/*
* *************************************************************************************
* 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.filter;
import com.espertech.esper.client.EventPropertyGetter;
import com.espertech.esper.epl.expression.ExprEvaluatorContext;
import com.espertech.esper.pattern.MatchedEventMap;
public class RangeValueContextProp implements FilterSpecParamRangeValue {
private static final long serialVersionUID = -3216208345920469926L;
private transient final EventPropertyGetter getter;
public RangeValueContextProp(EventPropertyGetter getter) {
this.getter = getter;
}
public Object getFilterValue(MatchedEventMap matchedEvents, ExprEvaluatorContext exprEvaluatorContext) {
if (exprEvaluatorContext.getContextProperties() == null) {
return null;
}
Object object = getter.get(exprEvaluatorContext.getContextProperties());
if (object == null) {
return null;
}
if (object instanceof String) {
return object;
}
Number value = (Number) object;
return value.doubleValue();
}
}