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      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 
     32     /*package*/ BluetoothOutputStream(BluetoothSocket s) {
     33         mSocket = s;
     34     }
     35 
     36     /**
     37      * Close this output stream and the socket associated with it.
     38      */
     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      */
     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      */
     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      */
     87     public void flush() throws IOException {
     88         mSocket.flush();
     89     }
     90 }
     91