added provider

haxework/provider/Provider.hx

@@ -0,0 +1,31 @@
+package haxework.provider;
+
+import haxe.ds.ObjectMap;
+import flash.errors.Error;
+
+class Provider {
+
+  private static var factories:ObjectMap<Dynamic, Class<Dynamic>> = new ObjectMap<Dynamic, Class<Dynamic>>();
+  private static var instances:ObjectMap<Dynamic, Dynamic> = new ObjectMap<Dynamic, Dynamic>();
+
+  public static function setFactory<T>(i:Class<T>, clazz:Class<T>, ?type:Dynamic):Void {
+    factories.set(type == null ? i : type, clazz);
+  }
+
+  public static function set<T>(i:Class<T>, instance:T, ?type:Dynamic):Void {
+    instances.set(type == null ? i : type, instance);
+  }
+
+  public static function get<T>(i:Class<T>, ?type:Dynamic):T {
+    var key:Dynamic = (type == null) ? i : type;
+    if (instances.exists(key)) {
+      return instances.get(key);
+    } else if (factories.exists(key)) {
+      var instance:T = Type.createInstance(factories.get(key), []);
+      instances.set(key, instance);
+      return instance;
+    } else {
+      throw new Error("Factory for\"" + i + "\" not found");
+    }
+  }
+}