D-Net

    /*  In case of special roles. Not to be used now

    private GrantedAuthoritiesMapper userAuthoritiesMapper() {

        return (authorities) -> {

            Set<GrantedAuthority> mappedAuthorities = new HashSet<>();

            mappedAuthorities.add(new SimpleGrantedAuthority("ROLE_USER"));

            System.out.println(mappedAuthorities);

            authorities.forEach(authority -> {

                if (OidcUserAuthority.class.isInstance(authority)) {

                    OidcUserAuthority oidcUserAuthority = (OidcUserAuthority)authority;

                    OidcUserInfo userInfo = oidcUserAuthority.getUserInfo();

                    //System.out.println(userInfo.getClaims().keySet());

                    //System.out.println(userInfo.containsClaim("edu_person_entitlements"));

                    if (userInfo.containsClaim("edu_person_entitlements")){

                        System.out.println(userInfo.getClaimAsStringList("edu_person_entitlements"));

                        for (String entitlement:userInfo.getClaimAsStringList("edu_person_entitlements")) {

                            //System.out.println("en " + entitlement);

                            //mappedAuthorities.add(new SimpleGrantedAuthority("ROLE_" + entitlement));

                            String  regex   = "urn:geant:openaire.eu:group:(\\w+).(\\w+):role=(\\w+)#aai.openaire.eu";

                            Matcher matcher = Pattern.compile(regex).matcher(entitlement);

                            if (matcher.find()) {

                                mappedAuthorities.add(new SimpleGrantedAuthority

                                        (new StringBuilder().append("ROLE_").append(matcher.group(1).toUpperCase()).append(".").append(matcher.group(3).toUpperCase()).toString()));

                            }

                        }

                    }

                } else if (OAuth2UserAuthority.class.isInstance(authority)) {

                    OAuth2UserAuthority oauth2UserAuthority = (OAuth2UserAuthority)authority;

                    Map<String, Object> userAttributes = oauth2UserAuthority.getAttributes();

                    if (userAttributes.containsKey("role")){

                        String roleName = "ROLE_" + (String)userAttributes.get("role");

                        mappedAuthorities.add(new SimpleGrantedAuthority(roleName));

                    }

                }

            });

            System.out.println(mappedAuthorities);

            return mappedAuthorities;

        };

    } */