question: @ SuppressWarnings ( { "unchecked" } ) private Map < String , Object > parameters ( ServletRequest req ) { Map < String , String [ ] > params = req . getParameterMap ( ) ; if ( F . isEmpty ( params ) ) return Collections . emptyMap ( ) ; Map < String , Object > map = U . newHashMap ( params . size ( ) ) ; for ( Map . Entry < String , String [ ] > entry : params . entrySet ( ) ) map . put ( entry . getKey ( ) , parameter ( entry . getValue ( ) ) ) ; return map ; }
target:  Parses HTTP parameters in an appropriate format and return back map of values to predefined list of names.