[evolution-data-server] Make ECollectionBackend and ECollectionBackendFactory instantiable.

[Matthew Barnes <mbarnes src gnome org>]

commit c0e7bfd277e0ee56a45a4125ec087ec24fa3ba47
Author: Matthew Barnes <mbarnes redhat com>
Date:   Mon Jan 28 11:37:22 2013 -0500

    Make ECollectionBackend and ECollectionBackendFactory instantiable.
    
    ECollectionBackendFactory will use a backend name of "none" and will
    instantiate an ECollectionBackend, which takes no action on its own.
    
    Believe it or not, there's actually a use case for this.
    
    GOA will soon add a provider for generic IMAP/SMTP accounts.  Our GOA
    module will support these accounts by configuring a collection source
    with a backend name of "none" as well as mail account, mail identity,
    and mail transport sources.
    
    The mechanics of ESourceRegistryServer do require a collection backend
    to support a collection source but the backend will have nothing to do.

 libebackend/e-collection-backend-factory.c |    6 ++++--
 libebackend/e-collection-backend.c         |   13 ++++++-------
 2 files changed, 10 insertions(+), 9 deletions(-)
---
diff --git a/libebackend/e-collection-backend-factory.c b/libebackend/e-collection-backend-factory.c
index 2903a33..aaa7bbf 100644
--- a/libebackend/e-collection-backend-factory.c
+++ b/libebackend/e-collection-backend-factory.c
@@ -19,7 +19,7 @@
 /**
  * SECTION: e-collection-backend-factory
  * @include: libebackend/libebackend.h
- * @short_description: An abstract base class for a data source collection
+ * @short_description: A base class for a data source collection
  *                     backend factory
  *
  * #ECollectionBackendFactory is a type of #EBackendFactory for creating
@@ -33,7 +33,7 @@
 #include <libebackend/e-collection-backend.h>
 #include <libebackend/e-source-registry-server.h>
 
-G_DEFINE_ABSTRACT_TYPE (
+G_DEFINE_TYPE (
 	ECollectionBackendFactory,
 	e_collection_backend_factory,
 	E_TYPE_BACKEND_FACTORY)
@@ -135,6 +135,8 @@ e_collection_backend_factory_class_init (ECollectionBackendFactoryClass *class)
 	factory_class->get_hash_key = collection_backend_factory_get_hash_key;
 	factory_class->new_backend = collection_backend_factory_new_backend;
 
+	class->factory_name = "none";
+	class->backend_type = E_TYPE_COLLECTION_BACKEND;
 	class->prepare_mail = collection_backend_factory_prepare_mail;
 }
 
diff --git a/libebackend/e-collection-backend.c b/libebackend/e-collection-backend.c
index 7a18cbb..c760e86 100644
--- a/libebackend/e-collection-backend.c
+++ b/libebackend/e-collection-backend.c
@@ -19,13 +19,12 @@
 /**
  * SECTION: e-collection-backend
  * @include: libebackend/libebackend.h
- * @short_description: An abstract base class for a data source
- *                     collection backend
+ * @short_description: A base class for a data source collection backend
  *
- * #ECollectionBackend is an abstract base class for backends which
- * manage a collection of data sources which collectively represent the
- * resources on a remote server.  The resources can include any number
- * of private and shared email stores, calendars and address books.
+ * #ECollectionBackend is a base class for backends which manage a
+ * collection of data sources that collectively represent the resources
+ * on a remote server.  The resources can include any number of private
+ * and shared email stores, calendars and address books.
  *
  * The backend's job is to synchronize local representations of remote
  * resources by adding and removing #EServerSideSource instances in an
@@ -83,7 +82,7 @@ enum {
 
 static guint signals[LAST_SIGNAL];
 
-G_DEFINE_ABSTRACT_TYPE (
+G_DEFINE_TYPE (
 	ECollectionBackend,
 	e_collection_backend,
 	E_TYPE_BACKEND)