1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
|
/*
* Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
import java.io.IOException;
import java.io.Reader;
import java.io.StringReader;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.ReadOnlyBufferException;
/*
* @test
* @bug 8266078
* @summary Tests that attempting to read into a read-only CharBuffer
* does not advance the Reader position
* @run main ReadIntoReadOnlyBuffer
*/
public class ReadIntoReadOnlyBuffer {
private static final String THE_STRING = "123";
public static void main(String[] args) throws Exception {
CharBuffer buf = CharBuffer.allocate(8).asReadOnlyBuffer();
StringReader r = new StringReader(THE_STRING);
read(r, buf);
buf = ByteBuffer.allocateDirect(16).asCharBuffer().asReadOnlyBuffer();
r = new StringReader(THE_STRING);
read(r, buf);
}
private static void read(Reader r, CharBuffer b) throws IOException {
try {
r.read(b);
throw new RuntimeException("ReadOnlyBufferException expected");
} catch (ReadOnlyBufferException expected) {
}
char[] c = new char[3];
int n = r.read(c);
if (n != c.length) {
throw new RuntimeException("Expected " + c.length + ", got " + n);
}
String s = new String(c);
if (!s.equals(THE_STRING)) {
throw new RuntimeException("Expected " + THE_STRING + ", got " + s);
}
}
}
|
