validate the jsonp query parameter value . the default implementation returns true if it consists of digits , letters , or '' _ '' and '' . '' . invalid parameter values are ignored . concode_field_sep String[] jsonpQueryParamNames concode_elem_sep Pattern CALLBACK_PARAM_PATTERN concode_field_sep Object beforeBodyWrite concode_elem_sep boolean supports concode_elem_sep MediaType getContentType concode_elem_sep void beforeBodyWriteInternal concode_elem_sep MappingFastJsonValue getOrCreateContainer
boolean function ( String arg0 ) { return CALLBACK_PARAM_PATTERN . matcher ( arg0 ) . matches ( ) ; }