1 /*
2  * Copyright (C) 2022 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.server.companion;
18 
19 import android.os.Parcel;
20 import android.os.ResultReceiver;
21 
22 /**
23  * A miscellaneous util class for CDM
24  *
25  * @hide
26  */
27 public final class Utils {
28 
29     /**
30      * Convert an instance of a "locally-defined" ResultReceiver to an instance of
31      * {@link android.os.ResultReceiver} itself, which the receiving process will be able to
32      * unmarshall.
33      * @hide
34      */
prepareForIpc(T resultReceiver)35     public static <T extends ResultReceiver> ResultReceiver prepareForIpc(T resultReceiver) {
36         final Parcel parcel = Parcel.obtain();
37         resultReceiver.writeToParcel(parcel, 0);
38         parcel.setDataPosition(0);
39 
40         final ResultReceiver ipcFriendly = ResultReceiver.CREATOR.createFromParcel(parcel);
41         parcel.recycle();
42 
43         return ipcFriendly;
44     }
45 
Utils()46     private Utils() {}
47 }
48