/*
***************************************************************************************
* 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.filter;
import com.espertech.esper.client.EventPropertyGetter;
import com.espertech.esper.epl.expression.core.ExprEvaluatorContext;
import com.espertech.esper.pattern.MatchedEventMap;
public class FilterForEvalContextPropString implements FilterSpecParamFilterForEval {
private transient final EventPropertyGetter getter;
private final String propertyName;
public FilterForEvalContextPropString(EventPropertyGetter getter, String propertyName) {
this.getter = getter;
this.propertyName = propertyName;
}
public Object getFilterValue(MatchedEventMap matchedEvents, ExprEvaluatorContext exprEvaluatorContext) {
if (exprEvaluatorContext.getContextProperties() == null) {
return null;
}
return getter.get(exprEvaluatorContext.getContextProperties());
}
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
FilterForEvalContextPropString that = (FilterForEvalContextPropString) o;
return propertyName.equals(that.propertyName);
}
public int hashCode() {
return propertyName.hashCode();
}
}