Re: [Vala] Writing objects to files

[Vivien Kraus <vivien planete-kraus eu>]

Hello,

I don't know what it's worth, but if you prefer XML this seems to be a
good solution: https://blogs.gnome.org/despinosa/2016/05/04/howto-gobje
ct-serialization-to-xml-using-gxml/

Vivien

Le lundi 26 mars 2018 à 14:02 -0700, Christian Hergert a écrit :
> On 03/26/2018 11:44 AM, Steven Oliver wrote:
> > I want to implement "saving" in my program. The data I want to save
> > is
> > a custom object. Is it possible in vala to simply write the object
> > to
> > disk (in binary I assume) without having to implement a to_string
> > method?
> >
> > It seems like such a simple concept yet i can't seem to figure out
> > how
> > to do it in Vala.
>
> A very simple option (assuming you don't have an object graph to
> serialize) could be to use either:
>
>   Json.gobject_serialize()
>   Json.gobject_to_data()
>
> to serialize and
>
>   Json.gobject_deserialize()
>   Json.gobject_from_data()
>
> to deserialize. If you need custom hooks into what will get
> serialized,
> you can implement Json.Serializable.
>
> If you really want binary, GVariant is a rather nice serialization
> format, but you might need to bring your own serializers. Json-GLib
> has
> some code for working with GVariant too, but I've not used it.
>
> If you need an object graph, the Gom¹ library I made several years
> back
> can help, but it is more intrusive on your object design. I've only
> used
> it from C, but others have used it from Gjs, so I would expect it to
> work in some form from Vala.
>
> -- Christian
>
> ¹ https://git.gnome.org/browse/gom
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