public void someAction(@RegEx(validation = "^A.*", caseSensitive = false) final String foo) {
}
}
final Method method = findMethod(Customer.class, "someAction", new Class[] { String.class });
facetFactory.processParams(new ProcessParameterContext(method, 0, facetedMethodParameter));
final Facet facet = facetedMethodParameter.getFacet(RegExFacet.class);
assertNotNull(facet);
assertTrue(facet instanceof RegExFacetOnParameterAnnotation);
final RegExFacetOnParameterAnnotation regExFacet = (RegExFacetOnParameterAnnotation) facet;