[rules-users] Problem with mvel trying to coerce a String to a number
I have a fact that a Map of Strings:
private Map<String,String> property = new HashMap<String,String>();
/**
* Gets the property map
* @return The property map
*/
public Map<String, String> getProperty() {
return property;
}
/**
* Sets the property map
* @param property The new property map
*/
public void setProperty(Map<String, String> property) {
this.property = property;
}
Inside a rule, I am trying to use this map and the rule looks like:
rule "3-new Notificationcp9145Authentication"
when
notification : Notificationcp9145Authentication($againstId :
targetID,
$badHostString : badHostString,
$applicationName : applicationName)
not AlarmEventFact(type == AlarmType.ACTIVE,
alarmName == "cp9145Authentication",
againstId == $againstId,
property['badHostString'] == $badHostString,
property['applicationName'] ==
$applicationName
)
then
alarmEventKnowledge.create(drools, notification,
"cp9145Authentication",
new Pair("badHostString",
$badHostString),
new Pair("applicationName",
$applicationName));
end
The problem that I am having is that the result of the lookup of
"property['badHostString']" is a string that looks like
"192.168.1.19"
(an IP address). The "badHostString" property of the
Notificationcp9145Authentication fact is a String. I am getting an
error when the rule is fired. It appears that the
"property['badHostString']" is trying to be interpreted as a number.
Here is some of the stack traceback:
Caused by: java.lang.NumberFormatException
at java.math.BigDecimal.<init>(BigDecimal.java:362)
at java.math.BigDecimal.<init>(BigDecimal.java:647)
at
org.mvel.math.IEEEFloatingPointMath.getBigDecimalFromType(IEEEFloatingPointMath.java:373)
at
org.mvel.math.IEEEFloatingPointMath._doOperations(IEEEFloatingPointMath.java:83)
at
org.mvel.math.IEEEFloatingPointMath.doOperation(IEEEFloatingPointMath.java:40)
at org.mvel.util.ParseTools.doOperations(ParseTools.java:753)
at
org.mvel.ast.BinaryOperation.getReducedValueAccelerated(BinaryOperation.java:20)
at org.mvel.MVELRuntime.execute(MVELRuntime.java:87)
at
org.mvel.CompiledExpression.getValue(CompiledExpression.java:98)
at org.mvel.MVEL.executeExpression(MVEL.java:202)
at
org.drools.base.mvel.MVELPredicateExpression.evaluate(MVELPredicateExpression.java:36)
at
org.drools.rule.PredicateConstraint.isAllowedCachedLeft(PredicateConstraint.java:206)
If I change the property value to be something like "abc" then this does
not occur, so I am pretty user that it is trying to convert
"192.168.1.19" to a number even though it is already a string and the
$badHostString is a String as well.
How can I force this to not try to convert?
Any help will be greatly appreciated.