1 /***
2 * Copyright 2008 ATG DUST 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 *
7 * You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and limitations under the License.
13 */
14 package atg.test.io;
15
16 import java.io.IOException;
17 import java.io.InputStream;
18 import java.nio.ByteBuffer;
19
20 /***
21 * An InputStream which reads from a ByteBuffer
22 *
23 * @author Adam Belmont
24 * @version $Id:$
25 * @see ByteBuffer
26 *
27 */
28 public class ByteBufferInputStream extends InputStream {
29
30 /*** Class version string */
31
32 public static String CLASS_VERSION =
33 "$Id:$";
34
35 private ByteBuffer mBuffer = null;
36
37 public ByteBufferInputStream(ByteBuffer pBuffer) {
38 mBuffer = pBuffer;
39 }
40
41 public int read(byte b[]) throws IOException {
42 return read(b, 0, b.length);
43 }
44
45 public synchronized int read() throws IOException {
46 if (!mBuffer.hasRemaining()) {
47 return -1;
48 }
49 return mBuffer.get();
50 }
51
52 public synchronized int read(byte[] bytes, int off, int len)
53 throws IOException {
54 len = Math.min(len, mBuffer.remaining());
55 mBuffer.get(bytes, off, len);
56 return len > 0 ? len : -1;
57 }
58 }