Java – how to convert exchange attributes to uppercase in ‘simple’?

How do I convert attributes on Apache camel exchange to uppercase in the Apache camel expression language?

for example

.when(simple("${property.countryCode.toUpperCase} regex 'NO?'"))

But I get:

org.apache.camel.language.bean.RuntimeBeanExpressionException:
Failed to invoke method: .toUpperCase on null

I have passed Log ("${property. Countrycode}") confirms that my property does exist

It shouldn't be so difficult to get touppercase in Apache simple (but it does)

I don't want to use touppercase, or groovy, or anything else in Java - there must be an easier way

Solution

attempt

.when(simple("${property.countryCode.toUpperCase()} regex 'NO?'"))