org.opennms.netmgt.measurements.impl

Class JexlEvaluateFunctions

java.lang.Object

org.opennms.netmgt.measurements.impl.JexlEvaluateFunctions

public class JexlEvaluateFunctions
extends Object

Functions to use JexlEngine to evaluate a given formula string against the current context

Author:

cgallen

Constructor Summary

Constructors

Constructor and Description
JexlEvaluateFunctions(org.apache.commons.jexl2.JexlContext context, org.apache.commons.jexl2.JexlEngine jexl)

Method Summary

Modifier and Type	Method and Description
Double	evaluate(String formula) Uses the JexlEngine to evaluate a string constant as a Jexl expression

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

JexlEvaluateFunctions

public JexlEvaluateFunctions(org.apache.commons.jexl2.JexlContext context,
                             org.apache.commons.jexl2.JexlEngine jexl)

Method Detail

evaluate

public Double evaluate(String formula)

Uses the JexlEngine to evaluate a string constant as a Jexl expression

Parameters:

formula - string expression to evaluate

Returns:

double value or NaN if formula cannot be evaluated