GrantedAuthoritiesMapper problem

gistfile1.txt

@Bean
public AuthenticationProvider activeDirectoryLdapAuthenticationProvider() {
    ActiveDirectoryLdapAuthenticationProvider provider = new ActiveDirectoryLdapAuthenticationProvider(domain, adUrls);
    provider.setConvertSubErrorCodesToExceptions(true);
    provider.setUseAuthenticationRequestCredentials(true);
    provider.setAuthoritiesMapper(applicationADGrantedAuthoritiesMapper());
    return provider;
}

gistfile2.txt

@Component
public class ApplicationADGrantedAuthoritiesMapper implements GrantedAuthoritiesMapper {

	private final Logger log = LoggerFactory.getLogger(this.getClass());
	
	@Autowired
	private RoleRepository roleRepository;
	
	@Override
	public Collection<? extends GrantedAuthority> mapAuthorities(Collection<? extends GrantedAuthority> authorities) {
		
		List<GrantedAuthority> authList = new ArrayList<GrantedAuthority>();
		authList.add(new SimpleGrantedAuthority("ciao"));
		
		if(authorities != null && authorities.size() >0 ) {
		
			List<String> groups = authorities.stream().map(GrantedAuthority::getAuthority).collect(Collectors.toList());
			
			List<Role> applicationRoles = roleRepository.findByActiveDirectoryGroupIn(groups);
			
			if(applicationRoles != null && applicationRoles.size() >0) {
				
				List<Permission> permissions = applicationRoles.stream().map(Role::getPermissions).flatMap(List::stream).collect(Collectors.toList());
				
				if(permissions != null)
					for (Permission permission : permissions) {
							
						 authList.add(new SimpleGrantedAuthority(permission.getName()));
					}
			}
		}
		
		log.debug("authorities : {}", authList);
		
		return authList;
	}

}