[CXF-8153] @Path with REGEX in path parameter and checkMethodsForInvalidURITemplates(userType, methods);

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 3.3.4
• Fix Version/s: 3.3.5, 3.4.0
• Component/s: JAX-RS
• Estimated Complexity: Unknown
• Assignee: Colm O hEigeartaigh
• Reporter: Luís Alves
• Created: 12/Nov/19 17:03
• Updated: 15/Jan/20 10:23
• Resolved: 10/Dec/19 11:03

Description

I have an API jar provided by the server, with the interface with all the JAX-RS annotations.
One of then has an REGEX. Something like:

@Path("{ resoureUUID : [0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}}}")

I can't create a proxy because the validation fails. Analyzing the code I get to
org.apache.cxf.microprofile.client.Validator#checkMethodsForInvalidURITemplates(Class, Method[]), more specifically to this part (with comments):

for (Parameter p : method.getParameters()) {
                    PathParam pathParam = p.getAnnotation(PathParam.class);
                    if (pathParam != null) {
                        // don't know the spec, but setting this to "x" cause the URITemplate to
                       // throw new IllegalArgumentException("Value '" + sval + "' does not match variable " + var.getName() + " with pattern " + var.getPattern());
                        paramMap.put(pathParam.value(), "x");
                    }
                }
                try {
                    template.substitute(paramMap, Collections.<String>emptySet(), false);
                } catch (IllegalArgumentException ex) {
                    throwException("VALIDATION_UNRESOLVED_PATH_PARAMS", userType, method);
                }

Not sure if this is a bug or by spec, but this prevents to use path params with regex, as the only regex that works must match "x".