get a parameter from a servletrequest . return null if the parameter contains only white spaces . concode_field_sep String HTML_TAIL concode_field_sep PrintWriter initHTML concode_elem_sep String encodeQueryValue concode_elem_sep long parseLongParam concode_elem_sep String encodePath concode_elem_sep String htmlFooter concode_elem_sep String getDecodedPath concode_elem_sep String getRawPath
String function ( ServletRequest arg0 , String arg1 ) { String loc0 = arg0 . getParameter ( arg1 ) ; if ( loc0 == null ) { return null ; } loc0 = loc0 . trim ( ) ; return loc0 . length ( ) == 0 ? null : loc0 ; }