[gnome-games] core: Add Uid

[Adrien Plazas <aplazas src gnome org>]

commit 9fea9baf747f2cc14add12ef2b8ddf2c0e9c7742
Author: Adrien Plazas <kekun plazas laposte net>
Date:   Tue Mar 22 18:45:00 2016 +0100

    core: Add Uid
    
    Add the Uid interface to be represent all the current *Uid classes.
    
    This will be used in a subsequent commit to make RetroRunner take a Uid
    parameter rather than a UID string, allowing to evaluate the UIDs
    lazily and hence helping to construct a RetroRunner earlier with no
    performance impact.
    
    This is needed to create a generic game type.

 plugins/dreamcast/src/dreamcast-uid.vala     |    2 +-
 plugins/game-cube/src/game-cube-uid.vala     |    2 +-
 plugins/sega-saturn/src/sega-saturn-uid.vala |    2 +-
 plugins/wii/src/wii-uid.vala                 |    2 +-
 src/Makefile.am                              |    1 +
 src/core/uid.vala                            |    5 +++++
 src/utils/fingerprint.vala                   |    2 +-
 7 files changed, 11 insertions(+), 5 deletions(-)
---
diff --git a/plugins/dreamcast/src/dreamcast-uid.vala b/plugins/dreamcast/src/dreamcast-uid.vala
index a4f1a2c..26a4bec 100644
--- a/plugins/dreamcast/src/dreamcast-uid.vala
+++ b/plugins/dreamcast/src/dreamcast-uid.vala
@@ -1,6 +1,6 @@
 // This file is part of GNOME Games. License: GPLv3
 
-private class Games.DreamcastUid: Object {
+private class Games.DreamcastUid: Object, Uid {
        private DreamcastHeader header;
        private string uid;
 
diff --git a/plugins/game-cube/src/game-cube-uid.vala b/plugins/game-cube/src/game-cube-uid.vala
index 66c0965..c0b20bc 100644
--- a/plugins/game-cube/src/game-cube-uid.vala
+++ b/plugins/game-cube/src/game-cube-uid.vala
@@ -1,6 +1,6 @@
 // This file is part of GNOME Games. License: GPLv3
 
-private class Games.GameCubeUid: Object {
+private class Games.GameCubeUid: Object, Uid {
        private GameCubeHeader header;
        private string uid;
 
diff --git a/plugins/sega-saturn/src/sega-saturn-uid.vala b/plugins/sega-saturn/src/sega-saturn-uid.vala
index 1d92247..268afd9 100644
--- a/plugins/sega-saturn/src/sega-saturn-uid.vala
+++ b/plugins/sega-saturn/src/sega-saturn-uid.vala
@@ -1,6 +1,6 @@
 // This file is part of GNOME Games. License: GPLv3
 
-private class Games.SegaSaturnUid: Object {
+private class Games.SegaSaturnUid: Object, Uid {
        private SegaSaturnHeader header;
        private string uid;
 
diff --git a/plugins/wii/src/wii-uid.vala b/plugins/wii/src/wii-uid.vala
index 7c46f00..a3bdbcf 100644
--- a/plugins/wii/src/wii-uid.vala
+++ b/plugins/wii/src/wii-uid.vala
@@ -1,6 +1,6 @@
 // This file is part of GNOME Games. License: GPLv3
 
-private class Games.WiiUid: Object {
+private class Games.WiiUid: Object, Uid {
        private WiiHeader header;
        private string uid;
 
diff --git a/src/Makefile.am b/src/Makefile.am
index 15d9bce..86b9f2c 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -42,6 +42,7 @@ gnome_games_SOURCES = \
        core/plugin-register.vala \
        core/plugin-registrar.vala \
        core/runner.vala \
+       core/uid.vala \
        \
        dummy/dummy-game.vala \
        dummy/dummy-game-source.vala \
diff --git a/src/core/uid.vala b/src/core/uid.vala
new file mode 100644
index 0000000..52400e2
--- /dev/null
+++ b/src/core/uid.vala
@@ -0,0 +1,5 @@
+// This file is part of GNOME Games. License: GPLv3
+
+public interface Games.Uid : Object {
+       public abstract string get_uid () throws Error;
+}
diff --git a/src/utils/fingerprint.vala b/src/utils/fingerprint.vala
index edd32c6..0c28482 100644
--- a/src/utils/fingerprint.vala
+++ b/src/utils/fingerprint.vala
@@ -19,7 +19,7 @@ namespace Games.Fingerprint {
        }
 }
 
-public class Games.FingerprintUid: Object {
+public class Games.FingerprintUid: Object, Uid {
        private string uri;
        private string prefix;
        private string uid;