reset this future to the initial state . concode_field_sep T result concode_elem_sep int S_CANCELED concode_elem_sep int S_ERROR concode_elem_sep int S_DONE concode_elem_sep int S_READY concode_elem_sep Exception error concode_elem_sep int state concode_field_sep boolean cancel concode_elem_sep boolean isCancelled concode_elem_sep T get concode_elem_sep T get concode_elem_sep T run concode_elem_sep boolean isDone
boolean function ( ) { if ( state == S_READY ) { return false ; } state = S_READY ; result = null ; error = null ; return true ; }