question: private Map toAvPairMap ( Set < String > names , String token ) { if ( token == null ) { return Collections . EMPTY_MAP ; } Map map = new HashMap ( ) ; Set < String > set = new HashSet < String > ( ) ; set . add ( token ) ; if ( names == null || names . isEmpty ( ) ) { return map ; } for ( final Object name : names ) { map . put ( name , set ) ; } return map ; }
target:  Converts a set to a map, keys are the elements in the set, value is the token. User naming attribute is always added as one of the key.