1 /*
2  * Copyright (C) 2021 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.systemui
18 
19 import com.android.internal.logging.InstanceId
20 import com.android.internal.logging.InstanceIdSequence
21 
22 /**
23  * Fake [InstanceId] generator.
24  */
25 class InstanceIdSequenceFake(instanceIdMax: Int) : InstanceIdSequence(instanceIdMax) {
26 
27     /**
28      * Last id used to generate a [InstanceId]. `-1` if no [InstanceId] has been generated.
29      */
30     var lastInstanceId = -1
31         private set
32 
33     override fun newInstanceId(): InstanceId {
34         if (lastInstanceId == -1 || lastInstanceId == mInstanceIdMax - 1) {
35             lastInstanceId = 1
36         } else {
37             lastInstanceId++
38         }
39         return newInstanceIdInternal(lastInstanceId)
40     }
41 }