1 files changed, 67 insertions, 0 deletions
diff --git a/common/src/com/android/tv/common/experiments/ExperimentFlag.java b/common/src/com/android/tv/common/experiments/ExperimentFlag.java
new file mode 100644
index 00000000..c9bacac4
--- /dev/null
+++ b/common/src/com/android/tv/common/experiments/ExperimentFlag.java
@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2016 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 com.android.tv.common.experiments;
+
+import android.support.annotation.VisibleForTesting;
+import com.android.tv.common.BuildConfig;
+
+
+/** Experiments return values based on user, device and other criteria. */
+public final class ExperimentFlag<T> {
+
+    private static boolean sAllowOverrides = false;
+
+    @VisibleForTesting
+    public static void initForTest() {
+        sAllowOverrides = true;
+    }
+
+    /** Returns a boolean experiment */
+    public static ExperimentFlag<Boolean> createFlag(
+            boolean defaultValue) {
+        return new ExperimentFlag<>(
+                defaultValue);
+    }
+
+    private final T mDefaultValue;
+
+    private T mOverrideValue = null;
+    private boolean mOverridden = false;
+
+    private ExperimentFlag(
+            T defaultValue) {
+        mDefaultValue = defaultValue;
+    }
+
+    /** Returns value for this experiment */
+    public T get() {
+        return sAllowOverrides && mOverridden ? mOverrideValue : mDefaultValue;
+    }
+
+    @VisibleForTesting
+    public void override(T t) {
+        if (sAllowOverrides) {
+            mOverridden = true;
+            mOverrideValue = t;
+        }
+    }
+
+    @VisibleForTesting
+    public void resetOverride() {
+        mOverridden = false;
+    }
+}