Spring MVC : Redirecting from a base controller - How to get the path to redirect to?

Question

I have searched and searched and have not found anything that says this is not possible, nor anything that explains how to do it.

If you have a Base Controller that is extended I understand that the request mapped methods are also inherited.

So with....

public abstract class BaseController
{

    @RequestMapping(value="hello", method=RequestMethod.GET)
    public String hello(Model model) {
        return "hello-view;
}

...a Controller like so ...

@Controller
@RequestMapping("/admin/")
public abstract class AdminController
{
 ....
}

...will inherit a method listening at /admin/hello that returns the hello-view.

This is all fine.

But what if I have a BaseController method that redirects:

public abstract class BaseController
{

    @RequestMapping(value="hello", method=RequestMethod.POST)
    public String hello(Model model) {
        return "redirect:/success/;
}

As I understand it the redirect requires either a relative or absolute URL rather than a viewname?

So how does my AdminController ensure the redirect takes place to /admin/success/?

How does the BaseController method get a handle on the class level @requestMapping on my AdminController?

Is this possible?

Answer 1

One option:

public abstract class BaseController
{
    /** get the context for the implementation controller **/
    protected abstract String getControllerContext();

    @RequestMapping(value="hello", method=RequestMethod.GET)
    public String hello(Model model) {
        return "redirect:"+getControllerContext()+"success/";
    }
}

and here's the admin controller.

@Controller
@RequestMapping(AdminController.context)
public abstract class AdminController
{
    static final String context = "/admin/";
    @Override
    protected String getControllerContext() {
        return context;
    }
 ....
}

Another option that involves reflection that might work...:

public abstract class BaseController
{
    String context = null;

    @RequestMapping(value="hello", method=RequestMethod.GET)
    public String hello(Model model) {
        return "redirect:"+getControllerContext()+"success/";
    }

    // untested code, but should get you started.
    private String getControllerContext() {
        if ( context == null ) {
            Class klass = this.getClass();
            Annotation annotation = klass.getAnnotation(RequestMapping.class);
            if ( annotation != null ) {
                context = annotation.value();
            }
        }
        return context;
    }
}