Add skeleton for future feature support

- Future feature is for feature which will not be enabled by default.
- These features are not ready yet and should not be used for
  production.
- APIs marked with FutureFeature annotation is for APIs under development.
  Those APIs should never used for production.

bug: 34710797
Test: build

Change-Id: If5d001f31b770fc6ba7bce084d98ce3c1fc1850f

1 files changed, 34 insertions, 0 deletions

diff --git a/car-lib/src/android/car/annotation/FutureFeature.java b/car-lib/src/android/car/annotation/FutureFeature.java
new file mode 100644
index 0000000000..70a0ad4542
--- /dev/null
+++ b/car-lib/src/android/car/annotation/FutureFeature.java
@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * 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.
+ */
+package android.car.annotation;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * Annotation to represent future feature which is not ready for the current platform release.
+ * Any API marked with this is for future development and should not be used for product.
+ *
+ * @hide
+ */
+@Target({ElementType.TYPE, ElementType.FIELD, ElementType.METHOD, ElementType.CONSTRUCTOR,
+        ElementType.LOCAL_VARIABLE})
+@Retention(RetentionPolicy.SOURCE)
+public @interface FutureFeature {
+    Class type() default Object.class;
+}