A proposal implementation

gistfile1.java

public boolean hasPermission(UserDetails userDetails, Object target, Object permission) {
    RunAsUserToken asUserToken = new RunAsUserToken(
            "key",
            userDetails,
            userDetails.getPassword(),
            userDetails.getAuthorities(),
            authentication.getClass());

    return permissionEvaluator.hasPermission(asUserToken, target, permission);
}