1 /*
2  * Copyright (C) 2017 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.os;
18 
19 import java.io.ByteArrayOutputStream;
20 import java.io.IOException;
21 import java.io.OutputStream;
22 
23 /**
24  * Helper class to get byte data through a pipe from a client app. Also {@see TransferPipe}.
25  */
26 public class ByteTransferPipe extends TransferPipe {
27     static final String TAG = "ByteTransferPipe";
28 
29     private ByteArrayOutputStream mOutputStream;
30 
ByteTransferPipe()31     public ByteTransferPipe() throws IOException {
32         super();
33     }
34 
ByteTransferPipe(String bufferPrefix)35     public ByteTransferPipe(String bufferPrefix) throws IOException {
36         super(bufferPrefix, "ByteTransferPipe");
37     }
38 
39     @Override
getNewOutputStream()40     protected OutputStream getNewOutputStream() {
41         mOutputStream = new ByteArrayOutputStream();
42         return mOutputStream;
43     }
44 
get()45     public byte[] get() throws IOException {
46         go(null);
47         return mOutputStream.toByteArray();
48     }
49 }
50