[gxml] Added SerializableEnum class

[Daniel Espinosa Ortiz <despinosa src gnome org>]

commit 92726bb327a2123f4ccb04615568d8f01af84849
Author: Daniel Espinosa <esodan gmail com>
Date:   Tue Sep 29 16:50:43 2015 -0500

    Added SerializableEnum class

 gxml/Makefile.am           |    1 +
 gxml/SerializableEnum.vala |   86 ++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 87 insertions(+), 0 deletions(-)
---
diff --git a/gxml/Makefile.am b/gxml/Makefile.am
index 06e57e5..629b7c7 100644
--- a/gxml/Makefile.am
+++ b/gxml/Makefile.am
@@ -57,6 +57,7 @@ sources = \
        Serializable.vala \
        SerializableProperty.vala \
        SerializableBool.vala \
+       SerializableEnum.vala \
        SerializableValueList.vala \
        Enumeration.vala \
        SerializableObjectModel.vala \
diff --git a/gxml/SerializableEnum.vala b/gxml/SerializableEnum.vala
new file mode 100644
index 0000000..4529291
--- /dev/null
+++ b/gxml/SerializableEnum.vala
@@ -0,0 +1,86 @@
+/* -*- Mode: vala; indent-tabs-mode: nil; c-basic-offset: 2; tab-width: 2 -*- */
+/* SerializableValueList.vala
+ *
+ * Copyright (C) 2015  Daniel Espinosa <esodan gmail com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ *
+ * Authors:
+ *      Daniel Espinosa <esodan gmail com>
+ */
+
+using Gee;
+/**
+ * Represent any value as string but a list of enum values by default to select from.
+ * property to be added as a { link GXml.Attr} to a { link GXml.Element}.
+ *
+ * This class makes easy to create enumerations with its representation to string,
+ * but limited to the actual values of the enumeration, making it flexible for
+ * values not supported now but possible because some extensions. Can be added
+ * an extension element in the enumeration and return it when the supported values
+ * are not met with the string representation in the property.
+ */
+public class GXml.SerializableEnum : SerializableObjectModel, SerializableProperty
+{
+  protected string _val = null;
+  protected string _name = null;
+  protected GLib.Type _enumtype;
+  public SerializableEnum.with_name (string name) { _name = name; }
+  public void set_enum_type (GLib.Type type)
+    requires (type.is_a (Type.ENUM))
+  { _enumtype = type; }
+  public GLib.Type get_enum_type () { return _enumtype; }
+  public EnumValue? parse (string str)
+  {
+    if (!_enumtype.is_a (Type.ENUM)) return null;
+    return Enumeration.parse (_enumtype, str);
+  }
+  public EnumValue? from_value (int val)
+  {
+    if (!_enumtype.is_a (Type.ENUM)) return null;
+    var vals = Enumeration.to_array (_enumtype);
+    if (vals == null) return null;
+    for (int i = 0; i < vals.length; i++) {
+      var e = vals[i];
+      if (e.value == val) return e;
+    }
+    return null;
+  }
+  public string get_serializable_property_value () { return _val; }
+  public void set_serializable_property_value (string? val) { _val = val; }
+  public string get_serializable_property_name () { return _name; }
+  public void set_serializable_property_name (string name) { _name = name; }
+  public override GXml.Node? serialize (GXml.Node node) throws GLib.Error
+  {
+    return default_serializable_property_serialize (node);
+  }
+  public override GXml.Node? serialize_property (GXml.Node element,
+                                        GLib.ParamSpec prop)
+                                        throws GLib.Error
+  {
+    return default_serializable_property_serialize_property (element, prop);
+  }
+  public override GXml.Node? deserialize (GXml.Node node)
+                                      throws GLib.Error
+  {
+    return default_serializable_property_deserialize (node);
+  }
+  public override bool deserialize_property (GXml.Node property_node)
+                                              throws GLib.Error
+  {
+    default_serializable_property_deserialize (property_node);
+    return true;
+  }
+  public override string to_string () { return _val; }
+}
\ No newline at end of file