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.ExpressionValue
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

Modifier and Type	Method and Description
void	accept(ThresholdDefVisitor thresholdDefVisitor)
double	evaluate(String expression, Map<String,Double> values) Evaluate given an already interpolated expression that contains no mate data.
String	getDatasourceExpression() getDatasourceExpression
Collection<String>	getRequiredDatasources() Returns the names of the datasources required to evaluate this threshold
ExpressionConfigWrapper.ExpressionValue	interpolateAndEvaluate(Map<String,Double> values, Scope scope) Evaluate with un-interpolated expression that may contain mate data, meaning we need to interpolate it first.

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(String expression,
                       Map<String,Double> values)
                throws ThresholdExpressionException

Evaluate given an already interpolated expression that contains no mate data.

Throws:

ThresholdExpressionException

interpolateAndEvaluate

public ExpressionConfigWrapper.ExpressionValue interpolateAndEvaluate(Map<String,Double> values,
                                                                      Scope scope)
                                                               throws ThresholdExpressionException

Evaluate with un-interpolated expression that may contain mate data, meaning we need to interpolate it first. The interpolation should happen once here and future calls to evaluate should use the resulting interpolated value.

Throws:

ThresholdExpressionException

accept

public void accept(ThresholdDefVisitor thresholdDefVisitor)

Specified by:

accept in class BaseThresholdDefConfigWrapper