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 java.io.IOException;
20 import java.io.OutputStream;
21 
22 /**
23  * BluetoothOutputStream.
24  *
25  * Used to read from a Bluetooth socket.
26  *
27  * @hide
28  */
29 /*package*/ final class BluetoothOutputStream extends OutputStream {
30     private BluetoothSocket mSocket;
31 
BluetoothOutputStream(BluetoothSocket s)32     /*package*/ BluetoothOutputStream(BluetoothSocket s) {
33         mSocket = s;
34     }
35 
36     /**
37      * Close this output stream and the socket associated with it.
38      */
close()39     public void close() throws IOException {
40         mSocket.close();
41     }
42 
43     /**
44      * Writes a single byte to this stream. Only the least significant byte of
45      * the integer {@code oneByte} is written to the stream.
46      *
47      * @param oneByte the byte to be written.
48      * @throws IOException if an error occurs while writing to this stream.
49      * @since Android 1.0
50      */
write(int oneByte)51     public void write(int oneByte) throws IOException {
52         byte[] b = new byte[1];
53         b[0] = (byte) oneByte;
54         mSocket.write(b, 0, 1);
55     }
56 
57     /**
58      * Writes {@code count} bytes from the byte array {@code buffer} starting
59      * at position {@code offset} to this stream.
60      *
61      * @param b the buffer to be written.
62      * @param offset the start position in {@code buffer} from where to get bytes.
63      * @param count the number of bytes from {@code buffer} to write to this stream.
64      * @throws IOException if an error occurs while writing to this stream.
65      * @throws IndexOutOfBoundsException if {@code offset < 0} or {@code count < 0}, or if {@code
66      * offset + count} is bigger than the length of {@code buffer}.
67      * @since Android 1.0
68      */
write(byte[] b, int offset, int count)69     public void write(byte[] b, int offset, int count) throws IOException {
70         if (b == null) {
71             throw new NullPointerException("buffer is null");
72         }
73         if ((offset | count) < 0 || count > b.length - offset) {
74             throw new IndexOutOfBoundsException("invalid offset or length");
75         }
76         mSocket.write(b, offset, count);
77     }
78 
79     /**
80      * Wait until the data in sending queue is emptied. A polling version
81      * for flush implementation. Use it to ensure the writing data afterwards will
82      * be packed in the new RFCOMM frame.
83      *
84      * @throws IOException if an i/o error occurs.
85      * @since Android 4.2.3
86      */
flush()87     public void flush() throws IOException {
88         mSocket.flush();
89     }
90 }
91