1 /*
2  * Copyright (C) 2023 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.internal.property;
18 
19 import android.car.hardware.CarPropertyValue;
20 
21 
22 /**
23  * Records the previous property event information and tracks whether the new property event
24  * contains update.
25  *
26  * @hide
27  */
28 public interface CarPropertyEventTracker {
29 
30     /** Gets the update rate in Hz. */
getUpdateRateHz()31     float getUpdateRateHz();
32 
33     /** Gets the current CarPropertyValue. */
getCurrentCarPropertyValue()34     CarPropertyValue<?> getCurrentCarPropertyValue();
35 
36     /** Returns true if the client needs to be updated for this event. */
hasUpdate(CarPropertyValue<?> carPropertyValue)37     boolean hasUpdate(CarPropertyValue<?> carPropertyValue);
38 }
39