1 /*
2  * Copyright (C) 2009 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 android.bluetooth;
18 
19 import android.annotation.SuppressLint;
20 
21 import java.io.IOException;
22 import java.io.OutputStream;
23 
24 /**
25  * BluetoothOutputStream.
26  *
27  * <p>Used to read from a Bluetooth socket.
28  *
29  * @hide
30  */
31 @SuppressLint("AndroidFrameworkBluetoothPermission")
32 /*package*/ final class BluetoothOutputStream extends OutputStream {
33     private BluetoothSocket mSocket;
34 
BluetoothOutputStream(BluetoothSocket s)35     /*package*/ BluetoothOutputStream(BluetoothSocket s) {
36         mSocket = s;
37     }
38 
39     /** Close this output stream and the socket associated with it. */
close()40     public void close() throws IOException {
41         mSocket.close();
42     }
43 
44     /**
45      * Writes a single byte to this stream. Only the least significant byte of the integer {@code
46      * oneByte} is written to the stream.
47      *
48      * @param oneByte the byte to be written.
49      * @throws IOException if an error occurs while writing to this stream.
50      * @since Android 1.0
51      */
write(int oneByte)52     public void write(int oneByte) throws IOException {
53         byte[] b = new byte[1];
54         b[0] = (byte) oneByte;
55         mSocket.write(b, 0, 1);
56     }
57 
58     /**
59      * Writes {@code count} bytes from the byte array {@code buffer} starting at position {@code
60      * offset} to this stream.
61      *
62      * @param b the buffer to be written.
63      * @param offset the start position in {@code buffer} from where to get bytes.
64      * @param count the number of bytes from {@code buffer} to write to this stream.
65      * @throws IOException if an error occurs while writing to this stream.
66      * @throws IndexOutOfBoundsException if {@code offset < 0} or {@code count < 0}, or if {@code
67      *     offset + count} is bigger than the length of {@code buffer}.
68      * @since Android 1.0
69      */
write(byte[] b, int offset, int count)70     public void write(byte[] b, int offset, int count) throws IOException {
71         if (b == null) {
72             throw new NullPointerException("buffer is null");
73         }
74         if ((offset | count) < 0 || count > b.length - offset) {
75             throw new IndexOutOfBoundsException("invalid offset or length");
76         }
77         mSocket.write(b, offset, count);
78     }
79 }
80