Initial Commit

Assets/Oculus/Interaction/Runtime/ThirdParty/InterfaceSupport/InterfaceAttribute.cs

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+/************************************************************************************
+Copyright : Copyright (c) Facebook Technologies, LLC and its affiliates. All rights reserved.
+
+Your use of this SDK or tool is subject to the Oculus SDK License Agreement, available at
+https://developer.oculus.com/licenses/oculussdk/
+
+Unless required by applicable law or agreed to in writing, the Utilities SDK distributed
+under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF
+ANY KIND, either express or implied. See the License for the specific language governing
+permissions and limitations under the License.
+************************************************************************************/
+
+using UnityEngine;
+using System;
+
+namespace Oculus.Interaction
+{
+    /// <summary>
+    /// When this attribute is attached to a MonoBehaviour field within a
+    /// Unity Object, this allows an interface to be specified in to to
+    /// entire only a specific type of MonoBehaviour can be attached.
+    /// </summary>
+	[AttributeUsage(AttributeTargets.Field, AllowMultiple = false)]
+    public class InterfaceAttribute : PropertyAttribute
+    {
+        public Type[] Types = null;
+        public string TypeFromFieldName;
+
+        /// <summary>
+        /// Creates a new Interface attribute.
+        /// </summary>
+        /// <param name="type">The type of interface which is allowed.</param>
+        /// <param name="types">Extra types of interface which is allowed.</param>
+        public InterfaceAttribute(Type type, params Type[] types)
+        {
+            Debug.Assert(type.IsInterface, $"{type.Name} needs to be an interface.");
+
+            Types = new Type[types.Length + 1];
+            Types[0] = type;
+            for (int i = 0; i < types.Length; i++)
+            {
+                Debug.Assert(types[i].IsInterface, $"{types[i].Name} needs to be an interface.");
+                Types[i+1] = types[i];
+            }
+        }
+
+        public InterfaceAttribute(string typeFromFieldName)
+        {
+            this.TypeFromFieldName = typeFromFieldName;
+        }
+    }
+}