[libgda] provider-meta: added 'connection' abstract property

[Daniel Espinosa Ortiz <despinosa src gnome org>]

commit d2cbe4d12067c4fbd4a09f21e3dcb7a663ef25b0
Author: Daniel Espinosa <esodan gmail com>
Date:   Mon Aug 20 11:29:51 2018 -0500

    provider-meta: added 'connection' abstract property

 libgda/gda-provider-meta.c | 36 +++++++++++++++++++++++++++++++++++-
 libgda/gda-provider-meta.h |  3 +++
 2 files changed, 38 insertions(+), 1 deletion(-)
---
diff --git a/libgda/gda-provider-meta.c b/libgda/gda-provider-meta.c
index 4af15a0e4..3f005eea0 100644
--- a/libgda/gda-provider-meta.c
+++ b/libgda/gda-provider-meta.c
@@ -17,11 +17,45 @@
  * Boston, MA  02110-1301, USA.
  */
 #include <libgda/gda-provider-meta.h>
+#include <libgda/gda-connection.h>
+
+enum {
+  PROP_CONNECTION = 1,
+  N_PROPERTIES
+};
+
+static GParamSpec *obj_properties[N_PROPERTIES] = { NULL, };
 
 G_DEFINE_INTERFACE(GdaProviderMeta, gda_provider_meta, G_TYPE_OBJECT)
 
 static void
-gda_provider_meta_default_init (GdaProviderMetaInterface *iface) {}
+gda_provider_meta_default_init (GdaProviderMetaInterface *iface) {
+
+  obj_properties[PROP_CONNECTION] =
+    g_param_spec_object ("connection",
+                         "Connection",
+                         "Connection to database to get metadata from",
+                         GDA_TYPE_CONNECTION,
+                         G_PARAM_CONSTRUCT_ONLY | G_PARAM_READABLE);
+
+  g_object_interface_install_property (iface,
+                                     obj_properties[PROP_CONNECTION]);
+}
+
+/**
+ * gda_provider_meta_get_connection:
+ * @prov:
+ *
+ * Returns: (transfer full): a #GdaConnection used by this object.
+ */
+GdaConnection*
+gda_provider_meta_get_connection (GdaProviderMeta *prov) {
+  g_return_val_if_fail (prov, NULL);
+  g_return_val_if_fail (GDA_IS_PROVIDER_META (prov), NULL);
+  GdaConnection *cnc = NULL;
+  g_object_get (G_OBJECT(prov), "connection", &cnc, NULL);
+  return cnc;
+}
 
 /* _builtin_data_types */
 /**
diff --git a/libgda/gda-provider-meta.h b/libgda/gda-provider-meta.h
index e6bfb9ea7..7f7d10ad0 100644
--- a/libgda/gda-provider-meta.h
+++ b/libgda/gda-provider-meta.h
@@ -229,6 +229,9 @@ struct _GdaProviderMetaInterface
   gpointer padding[12];
 };
 
+
+GdaConnection *gda_provider_meta_get_connection       (GdaProviderMeta *prov);
+
 /* _builtin_data_types */
 GdaDataModel *gda_provider_meta_btypes                (GdaProviderMeta *prov,
                               GError **error);