Re: [dbus] type errors

[Lluís]

Michael Albinus writes:

> Lluís <address@hidden> writes:
>> Hi there,

> Hi,

>> I've been trying to register a dbus method which is supposed to return a 
>> list of
>> elements with the following dbus signature: sssbxxa{sv} (method "GetEvents" 
>> in
>> "org.gnome.Shell.CalendarServer").

> You mean you wrote an own handler which reacts on
> "org.gnome.Shell.CalendarServer.GetEvents"?

I'm not sure about the nomenclature. Here's what I did (gets called when
clicking on the calendar "widget"):

#v+
(dbus-register-method :session
                      "org.gnome.Shell.CalendarServer"
                      "/org/gnome/Shell/CalendarServer"
                      "org.gnome.Shell.CalendarServer"
                      "GetEvents"
                      'ogc:--dbus-get-events)
#v-


>> When returning the results, a backtrace pops up with the following error for
>> the "b" argument):
>> 
>> Debugger entered--Lisp error: (wrong-type-argument D-Bus 63490176000)
>> dbus-message-internal(2 :session ":1.15" 18130 ...)
>> apply(dbus-message-internal 2 :session ":1.15" 18130 (...))
>> dbus-method-return-internal(:session ":1.15" 18130 ...)
>> apply(dbus-method-return-internal :session ":1.15" 18130 (...))

> Boolean requests values `t' or `nil'. Not an integer.

Bad paste, sorry. This is the back trace:

#v+
Debugger entered--Lisp error: (wrong-type-argument D-Bus nil)
  dbus-message-internal(2 :session ":1.15" 18386 ("" "Test" "" nil 63490176000 
63490176001))
  apply(dbus-message-internal 2 :session ":1.15" 18386 ("" "Test" "" nil 
63490176000 63490176001))
  dbus-method-return-internal(:session ":1.15" 18386 ("" "Test" "" nil 
63490176000 63490176001))
  apply(dbus-method-return-internal :session ":1.15" 18386 ("" "Test" "" nil 
63490176000 63490176001))
#v-


And here's a test handler:

#v+
(defun ogc:--dbus-get-events (since until force-reload)
  '(("" "Test" "" nil 63490176000 63490176001)))
#v-


>> And for the "x" argument:
>> 
>> (wrong-type-argument D-Bus 63490176000)

> Per default, UINT32 is assumed. If you want to return INT64, you must
> specify the type for that value. Something like ... :int64 63490176000 ...

Adding a ":int64" also throws an error.


>> According to the docs in `dbus', these objects should be automatically
>> translated to their dbus counterparts (at least on `dbus-call-method').

> The signature of a method is not analyzed in dbus.el. That's why you must
> always specify the correct type, if you want to have something different
> but the default type.

> See (info "(dbus)Type Conversion")

Does not seem to exist in my currently installed package... (latest jd's
emacs-snapshot).


Lluis

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