Question

For an arbitrary object what is the easiest way to determine if the type of the object is a Grails domain class?

Answer 1

You can use the GrailsApplication for that. Add a dependency injection to your controller or service:

def grailsApplication

and then you can use it like this:

def foo = ...
if (grailsApplication.isDomainClass(foo.getClass()) {
    ...
}