Add a simple Vala serialization example

We don't provide the Serializable interface at the moment, because it
is too much C-oriented. This example shows how to serialize a class in
Vala to a JSON string.

1 files changed, 40 insertions, 0 deletions

diff --git a/contrib/json-object.vala b/contrib/json-object.vala
new file mode 100644
index 0000000..a8058f5
--- /dev/null
+++ b/contrib/json-object.vala
@@ -0,0 +1,40 @@
+using GLib;
+using Json;
+
+public class Sample : GLib.Object {
+        public bool toggle { get; set; }
+        public string name { get; set; }
+
+        public Sample () {
+                name = "Hello, world!";
+                toggle = true;
+        }
+
+        public string to_json () {
+                var obj = new Json.Object ();
+
+                var node = new Json.Node (Json.NodeType.VALUE);
+                node.set_string (name);
+                obj.add_member ("name", node.copy ());
+
+                node = new Json.Node (Json.NodeType.VALUE);
+                node.set_boolean (toggle);
+                obj.add_member ("toggle", node.copy ());
+                
+                var root = new Json.Node (Json.NodeType.OBJECT);
+                root.set_object (obj);
+
+                var generator = new Json.Generator ();
+                generator.set_root (root);
+
+                return generator.to_data ();
+        }
+
+        static int main (string[] args) {
+                var sample = new Sample ();
+                
+                stdout.printf ("var sample = %s;\n", sample.to_json ());
+
+                return 0;
+        }
+}