1 /*
2  * Copyright 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 androidx.datastore.core
18 
19 import java.io.FileOutputStream
20 import java.io.OutputStream
21 
22 /** Wrapper on FileOutputStream to prevent closing the underlying OutputStream. */
23 internal class UncloseableOutputStream(val fileOutputStream: FileOutputStream) : OutputStream() {
24 
writenull25     override fun write(b: Int) {
26         fileOutputStream.write(b)
27     }
28 
writenull29     override fun write(b: ByteArray) {
30         fileOutputStream.write(b)
31     }
32 
writenull33     override fun write(bytes: ByteArray, off: Int, len: Int) {
34         fileOutputStream.write(bytes, off, len)
35     }
36 
closenull37     override fun close() {
38         // We will not close the underlying FileOutputStream until after we're done syncing
39         // the fd. This is useful for things like b/173037611.
40     }
41 
flushnull42     override fun flush() {
43         fileOutputStream.flush()
44     }
45 }
46