[CAMEL-10584] spring boot auto configuration mojo: use Class.isAssignableFrom instead of instanceof as the later may fail at compile time in case of final classes

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.19.0
• Component/s: tooling
• Estimated Complexity: Unknown
• Assignee: Luca Burgazzoli
• Reporter: Luca Burgazzoli
• Created: 09/Dec/16 14:28
• Updated: 09/Dec/16 17:53
• Resolved: 09/Dec/16 17:53

Description

In *AutoConfiguration classes generated by camel-package-plugin, there is a check like

if (myInstance instanceof CamelContextAware) {
    ((CamelContextAware) dataformat).setCamelContext(camelContext);
}

This check may fail at compile time if myInstance is final and it is not an instance of CamelContextAware which make not possible to write final classes.

We should do something like:

if (CamelContextAware.class.isAssignableFrom(MyInstanceType.class)) {
    CamelContextAware context = CamelContextAware.class.cast(myInstance);
    if (context != null) {
        context.setCamelContext(camelContext);
    }
}