diff options
Diffstat (limited to 'common/src/com/android/tv/common/experiments/ExperimentFlag.java')
-rw-r--r-- | common/src/com/android/tv/common/experiments/ExperimentFlag.java | 67 |
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; + } +} |