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.annotation.NonNull;
20 import android.os.Handler;
21 
22 import java.util.concurrent.Executor;
23 import java.util.concurrent.RejectedExecutionException;
24 
25 /**
26  * An adapter {@link Executor} that posts all executed tasks onto the given
27  * {@link Handler}.
28  *
29  * @hide
30  */
31 public class HandlerExecutor implements Executor {
32     private final Handler mHandler;
33 
HandlerExecutor(@onNull Handler handler)34     public HandlerExecutor(@NonNull Handler handler) {
35         if (handler == null) {
36             throw new NullPointerException();
37         }
38         mHandler = handler;
39     }
40 
41     @Override
execute(Runnable command)42     public void execute(Runnable command) {
43         if (!mHandler.post(command)) {
44             throw new RejectedExecutionException(mHandler + " is shutting down");
45         }
46     }
47 }
48