Use sys.property in xpath filter

[bhusted]

Is it possible to refer to a Java System property in a camel:xpath filter?

For example:

<camel:filter>
   <camel:xpath>/myns:SomeTag = ${sys.SomeSystemProp}</camel:xpath>
</camel:filter>


Any suggestions if this isn't possible for combining xpath and expression language would be REALLY helpful.

Thanks