1 /*
2  * Copyright (C) 2018 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 
17 package com.android.car.settings.common;
18 
19 import androidx.preference.Preference;
20 
21 /** Contains utility function to operate on Preferences. */
22 public class PreferenceUtil {
23 
24     /** Ensures that the preference of given type. */
checkPreferenceType(Preference preference, Class expectedType)25     public static boolean checkPreferenceType(Preference preference, Class expectedType) {
26         return expectedType.isInstance(preference);
27     }
28 
29     /**
30      * Requires that the preference is of given type.
31      *
32      * @throws IllegalArgumentException if the preference is not of the given type.
33      */
requirePreferenceType(Preference preference, Class expectedType)34     public static void requirePreferenceType(Preference preference, Class expectedType) {
35         if (!checkPreferenceType(preference, expectedType)) {
36             throw new IllegalArgumentException(
37                     "Preference should be of type " + expectedType.getName());
38         }
39     }
40 }
41