1 /*
2  * Copyright (C) 2019 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.internal.telephony.util;
18 
19 import android.os.IInterface;
20 import android.os.RemoteCallbackList;
21 
22 import java.util.function.Consumer;
23 
24 /**
25  * Extension of RemoteCallbackList
26  * @param <E> defines the type of registered callbacks
27  */
28 public class RemoteCallbackListExt<E extends IInterface> extends RemoteCallbackList<E> {
29     /**
30      * Performs {@code action} on each callback, calling
31      * {@link RemoteCallbackListExt#beginBroadcast()}
32      * /{@link RemoteCallbackListExt#finishBroadcast()} before/after looping
33      * @param action to be performed on each callback
34      *
35      */
broadcastAction(Consumer<E> action)36     public void broadcastAction(Consumer<E> action) {
37         int itemCount = beginBroadcast();
38         try {
39             for (int i = 0; i < itemCount; i++) {
40                 action.accept(getBroadcastItem(i));
41             }
42         } finally {
43             finishBroadcast();
44         }
45     }
46 }
47