1 /*
2  * Copyright (C) 2016 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 package com.android.networkrecommendation.config;
17 
18 /**
19  * Simple configuration parameters for application behavior.
20  * @param <T> A type for a flag value.
21  */
22 public class Flag<T> {
23 
24     private final T mDefaultValue;
25     private T mOverride;
26 
Flag(T defaultValue)27     public Flag(T defaultValue) {
28         mDefaultValue = defaultValue;
29         mOverride = null;
30     }
31 
32     /** Get the currently set flag value. */
get()33     public T get() {
34         return mOverride != null ? mOverride : mDefaultValue;
35     }
36 
37     /** Force a value for testing. */
override(T value)38     public void override(T value) {
39         mOverride = value;
40     }
41 
42     /** Ensure flag state is initialized for tests. */
initForTest()43     public static void initForTest() {
44     }
45 }
46