@Override
	protected Collection<? extends GrantedAuthority> loadUserAuthorities(
			DirContextOperations userData, String username, String password) {
		String[] groups = userData.getStringAttributes("memberOf");

		if (groups == null) {
			logger.debug("No values for 'memberOf' attribute.");

			return AuthorityUtils.NO_AUTHORITIES;
		}

		if (logger.isDebugEnabled()) {
			logger.debug("'memberOf' attribute values: " + Arrays.asList(groups));
		}

		ArrayList<GrantedAuthority> authorities = new ArrayList<>(
				groups.length);

		for (String group : groups) {
			authorities.add(new SimpleGrantedAuthority(new DistinguishedName(group)
					.removeLast().getValue()));
		}

		return authorities;
	}
@ Override protected Collection < ? extends GrantedAuthority > loadUserAuthorities ( DirContextOperations userData , String username , String password ) { String [ ] groups = userData . getStringAttributes ( "memberOf" ) ; if ( groups == null ) { logger . debug ( "No values for 'memberOf' attribute." ) ; return AuthorityUtils . NO_AUTHORITIES ; } if ( logger . isDebugEnabled ( ) ) { logger . debug ( "'memberOf' attribute values: " + Arrays . asList ( groups ) ) ; } ArrayList < GrantedAuthority > authorities = new ArrayList < > ( groups . length ) ; for ( String group : groups ) { authorities . add ( new SimpleGrantedAuthority ( new DistinguishedName ( group ) . removeLast ( ) . getValue ( ) ) ) ; } return authorities ; }
Creates the user authority list from the values of the {@code memberOf} attribute
obtained from the user's Active Directory entry.