select an appropriate character encoding to be used , based on the characteristics of the current request and/or filter initialization parameters . if no character encoding should be set , return null . the default implementation unconditionally returns the value configured by the encoding initialization parameter for this filter . concode_field_sep String encoding concode_elem_sep FilterConfig filterConfig concode_elem_sep boolean ignore concode_field_sep void init concode_elem_sep void doFilter concode_elem_sep void destroy
String function ( ServletRequest arg0 ) { return ( this . encoding ) ; }