[gom] gom: Add GomResource property metadata

[Bastien Nocera <hadess src gnome org>]

commit a8094cf57213f383a48c2f76e12654c872955741
Author: Bastien Nocera <hadess hadess net>
Date:   Tue Apr 15 18:20:51 2014 +0200

    gom: Add GomResource property metadata
    
    Add "new-in-version" and "is-mapped" metadata for GomResource
    sub-class properties. This allows application developers to
    control which properties will be mapped to column names, and
    tell the automated migration tool which columns to add.

 gom/gom-command-builder.c |   15 +++++++++++----
 gom/gom-resource.c        |   43 +++++++++++++++++++++++++++++++++++++++++++
 gom/gom-resource.h        |   11 +++++++++++
 3 files changed, 65 insertions(+), 4 deletions(-)
---
diff --git a/gom/gom-command-builder.c b/gom/gom-command-builder.c
index 9ef9fcb..efb1a74 100644
--- a/gom/gom-command-builder.c
+++ b/gom/gom-command-builder.c
@@ -76,19 +76,26 @@ is_mapped (GParamSpec *pspec)
 {
    gboolean ret;
 
-   /*
-    * TODO: Make this better, like let classes opt in to what
-    *       fields they want mapped.
-    */
    ret = (pspec->owner_type != GOM_TYPE_RESOURCE);
    if (!ret)
      return FALSE;
 
    ret = (sql_type_for_column(pspec) != NULL);
+   if (!ret)
+     return FALSE;
+
+   ret = !GPOINTER_TO_INT(g_param_spec_get_qdata(pspec, GOM_RESOURCE_NOT_MAPPED));
 
    return ret;
 }
 
+static gboolean
+is_new_in_version (GParamSpec *pspec,
+                   guint       version)
+{
+   return GPOINTER_TO_UINT(g_param_spec_get_qdata(pspec, GOM_RESOURCE_NEW_IN_VERSION)) == version;
+}
+
 static void
 add_fields (GString          *str,
             GomResourceClass *klass)
diff --git a/gom/gom-resource.c b/gom/gom-resource.c
index 6a39520..43affe3 100644
--- a/gom/gom-resource.c
+++ b/gom/gom-resource.c
@@ -55,6 +55,37 @@ gom_resource_class_set_primary_key (GomResourceClass *resource_class,
 }
 
 void
+gom_resource_class_set_property_new_in_version (GomResourceClass *resource_class,
+                                                const gchar      *property_name,
+                                                guint             version)
+{
+   GParamSpec *pspec;
+
+   g_return_if_fail(GOM_IS_RESOURCE_CLASS(resource_class));
+   g_return_if_fail(version >= 1);
+
+   pspec = g_object_class_find_property(G_OBJECT_CLASS(resource_class), property_name);
+   g_assert(pspec);
+
+   g_param_spec_set_qdata(pspec, GOM_RESOURCE_NEW_IN_VERSION, GUINT_TO_POINTER(version));
+}
+
+void
+gom_resource_class_set_property_set_mapped (GomResourceClass *resource_class,
+                                            const gchar      *property_name,
+                                            gboolean          is_mapped)
+{
+   GParamSpec *pspec;
+
+   g_return_if_fail(GOM_IS_RESOURCE_CLASS(resource_class));
+
+   pspec = g_object_class_find_property(G_OBJECT_CLASS(resource_class), property_name);
+   g_assert(pspec);
+
+   g_param_spec_set_qdata(pspec, GOM_RESOURCE_NOT_MAPPED, GINT_TO_POINTER(!is_mapped));
+}
+
+void
 gom_resource_class_set_table (GomResourceClass *resource_class,
                               const gchar      *table)
 {
@@ -809,3 +840,15 @@ gom_resource_error_quark (void)
 {
    return g_quark_from_static_string("gom_resource_error_quark");
 }
+
+GQuark
+gom_resource_new_in_version_quark (void)
+{
+   return g_quark_from_static_string("gom_resource_new_in_version_quark");
+}
+
+GQuark
+gom_resource_not_mapped_quark (void)
+{
+   return g_quark_from_static_string("gom_resource_not_mapped_quark");
+}
diff --git a/gom/gom-resource.h b/gom/gom-resource.h
index e216700..320f1d5 100644
--- a/gom/gom-resource.h
+++ b/gom/gom-resource.h
@@ -33,6 +33,8 @@ G_BEGIN_DECLS
 #define GOM_IS_RESOURCE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass),  GOM_TYPE_RESOURCE))
 #define GOM_RESOURCE_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj),  GOM_TYPE_RESOURCE, 
GomResourceClass))
 #define GOM_RESOURCE_ERROR           (gom_resource_error_quark())
+#define GOM_RESOURCE_NEW_IN_VERSION  (gom_resource_new_in_version_quark())
+#define GOM_RESOURCE_NOT_MAPPED      (gom_resource_not_mapped_quark())
 
 typedef struct _GomResource        GomResource;
 typedef struct _GomResourceClass   GomResourceClass;
@@ -66,6 +68,13 @@ void              gom_resource_class_set_table       (GomResourceClass *resource
                                                       const gchar      *table);
 void              gom_resource_class_set_primary_key (GomResourceClass *resource_class,
                                                       const gchar      *primary_key);
+void              gom_resource_class_set_property_new_in_version (GomResourceClass *resource_class,
+                                                                  const gchar      *property_name,
+                                                                  guint             version);
+void              gom_resource_class_set_property_set_mapped     (GomResourceClass *resource_class,
+                                                                  const gchar      *property_name,
+                                                                  gboolean          is_mapped);
+
 void              gom_resource_delete_async          (GomResource          *resource,
                                                       GAsyncReadyCallback   callback,
                                                       gpointer              user_data);
@@ -75,6 +84,8 @@ gboolean          gom_resource_delete_finish         (GomResource          *reso
 gboolean          gom_resource_delete_sync           (GomResource          *resource,
                                                       GError              **error);
 GQuark            gom_resource_error_quark           (void) G_GNUC_CONST;
+GQuark            gom_resource_new_in_version_quark  (void) G_GNUC_CONST;
+GQuark            gom_resource_not_mapped_quark      (void) G_GNUC_CONST;
 GType             gom_resource_get_type              (void) G_GNUC_CONST;
 void              gom_resource_save_async            (GomResource          *resource,
                                                       GAsyncReadyCallback   callback,