question: private StringBuilder generateParameters ( ) { StringBuilder parameters = new StringBuilder ( ) ; if ( filterMap == null && expandParameters == null ) { return parameters ; } parameters . append ( '?' ) ; int filterParameterCounter = 0 ; if ( filterMap != null && ! filterMap . isEmpty ( ) ) { parameters . append ( FILTER_PREFIX ) ; for ( Map . Entry < String , String > filterEntry : filterMap . entrySet ( ) ) { parameters . append ( String . format ( "%s eq '%s'" , filterEntry . getKey ( ) , filterEntry . getValue ( ) ) ) ; if ( ++ filterParameterCounter < filterMap . size ( ) ) { parameters . append ( " and " ) ; } } if ( expandParameters != null ) { parameters . append ( "&" ) ; } } if ( expandParameters != null ) { parameters . append ( EXPAND_PREFIX ) ; Iterator iterator = expandParameters . iterator ( ) ; parameters . append ( String . format ( "%s" , iterator . next ( ) ) ) ; while ( iterator . hasNext ( ) ) { parameters . append ( String . format ( ",%s" , iterator . next ( ) ) ) ; } } return parameters ; }
target:  Returns a StringBuilder that is consisted of filtering and expanding parameters that in turn are appended to the query string used for Odata Client. An Odata Client query can have either one of filter or expand parameters (with multiple properties if desired) or both. <p>