org.opennms.netmgt.threshd

Class ExpressionConfigWrapper

java.lang.Object

org.opennms.netmgt.threshd.BaseThresholdDefConfigWrapper

org.opennms.netmgt.threshd.ExpressionConfigWrapper

public class ExpressionConfigWrapper
extends BaseThresholdDefConfigWrapper

Author:

Alejandro Galue, Jeff Gehlbach, Craig Miskell

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ExpressionConfigWrapper.MathBinding This class provides an instance that gives access to the Math functions.

Constructor Summary

Constructors

Constructor and Description
ExpressionConfigWrapper(Expression expression)

Method Summary

Methods

Modifier and Type	Method and Description
double	evaluate(Map<String,Double> values) Evaluate the threshold expression/datasource in terms of the named values supplied, and return that value
String	getDatasourceExpression() getDatasourceExpression
Collection<String>	getRequiredDatasources() Returns the names of the datasources required to evaluate this threshold

Methods inherited from class org.opennms.netmgt.threshd.BaseThresholdDefConfigWrapper

equals, getBasethresholddef, getConfigWrapper, getDsLabel, getDsType, getFilterDatasources, getRearm, getRearmedUEI, getTrigger, getTriggeredUEI, getType, getValue, hashCode, hasRearm, hasTrigger, hasValue, merge

Methods inherited from class java.lang.Object

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

Constructor Detail

ExpressionConfigWrapper

public ExpressionConfigWrapper(Expression expression)
                        throws ThresholdExpressionException

Throws:

ThresholdExpressionException

Method Detail

getDatasourceExpression

public String getDatasourceExpression()

Description copied from class: BaseThresholdDefConfigWrapper

getDatasourceExpression

Specified by:

getDatasourceExpression in class BaseThresholdDefConfigWrapper

Returns:

a descriptive string for the data source - typically either a data source name, or an expression of data source names

getRequiredDatasources

public Collection<String> getRequiredDatasources()

Description copied from class: BaseThresholdDefConfigWrapper

Returns the names of the datasources required to evaluate this threshold

Specified by:

getRequiredDatasources in class BaseThresholdDefConfigWrapper

Returns:

Collection of the names of datasources

evaluate

public double evaluate(Map<String,Double> values)
                throws ThresholdExpressionException

Description copied from class: BaseThresholdDefConfigWrapper

Evaluate the threshold expression/datasource in terms of the named values supplied, and return that value

Specified by:

evaluate in class BaseThresholdDefConfigWrapper

Parameters:

values - named values to use in evaluating the expression/data source

Returns:

the value of the evaluated expression

Throws:

ThresholdExpressionException - if any.