1 /*
2 * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24 /* @test
25 * @bug 6227608
26 * @summary Test proper handling of flush()
27 * @author Martin Buchholz
28 */
29
30 import java.util.*;
31 import java.io.*;
32 import java.nio.*;
33 import java.nio.charset.*;
34
35 public class Flush {
36 private static byte[] contents(ByteBuffer bb) {
37 byte[] contents = new byte[bb.position()];
38 ((ByteBuffer)(bb.duplicate().flip())).get(contents);
39 return contents;
40 }
41
42 private static ByteBuffer extend(ByteBuffer bb) {
43 ByteBuffer x = ByteBuffer.allocate(2*bb.capacity()+10);
44 bb.flip();
45 x.put(bb);
46 return x;
47 }
48
49 private static void realMain(String[] args) throws Throwable {
50 // A japanese character should decode as a 3-byte
51 // switch-to-japanese escape sequence, followed by a 2-byte
52 // encoding of the char itself, followed by a 3-byte return to
53 // ASCII escape sequence.
54 char[] jis0208 = {'\u3001'};
55 CharBuffer cb = CharBuffer.wrap(jis0208);
56 ByteBuffer bb = ByteBuffer.allocate(6);
57 CharsetEncoder enc = Charset.forName("ISO-2022-JP").newEncoder();
58
59 check(enc.encode(cb, bb, true).isUnderflow());
60
61 System.out.println(Arrays.toString(contents(bb)));
62 check(! cb.hasRemaining());
63 equal(contents(bb).length, 3 + 2);
64 equal(bb.get(0), (byte)0x1b);
65
66 //----------------------------------------------------------------
67 // We must be able to recover if flush() returns OVERFLOW
68 //----------------------------------------------------------------
69 check(enc.flush(bb).isOverflow());
70 check(enc.flush(bb).isOverflow());
71 equal(contents(bb).length, 3 + 2);
72
73 bb = extend(bb);
74
75 check(enc.flush(bb).isUnderflow());
76 equal(bb.get(3 + 2), (byte)0x1b);
77 System.out.println(Arrays.toString(contents(bb)));
78 equal(contents(bb).length, 3 + 2 + 3);
79
80 //----------------------------------------------------------------
81 // A final redundant flush() is a no-op
82 //----------------------------------------------------------------
83 check(enc.flush(bb).isUnderflow());
84 check(enc.flush(bb).isUnderflow());
85 equal(contents(bb).length, 3 + 2 + 3);
86
87 //----------------------------------------------------------------
88 // CharsetEncoder.encode(ByteBuffer) must call flush(ByteBuffer)
89 //----------------------------------------------------------------
90 bb = enc.encode(CharBuffer.wrap(jis0208));
91 byte[] expected = "\u001b$B!\"\u001b(B".getBytes("ASCII");
92 byte[] contents = new byte[bb.limit()]; bb.get(contents);
93 check(Arrays.equals(contents, expected));
94 }
95
96 //--------------------- Infrastructure ---------------------------
97 static volatile int passed = 0, failed = 0;
98 static void pass() { passed++; }
99 static void fail() { failed++; Thread.dumpStack(); }
100 static void fail(String msg) { System.out.println(msg); fail(); }
101 static void unexpected(Throwable t) { failed++; t.printStackTrace(); }
102 static void check(boolean cond) { if (cond) pass(); else fail(); }
103 static void equal(Object x, Object y) {
104 if (x == null ? y == null : x.equals(y)) pass();
105 else {System.out.println(x + " not equal to " + y); fail(); }}
106
107 public static void main(String[] args) throws Throwable {
108 try { realMain(args); } catch (Throwable t) { unexpected(t); }
109
110 System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed);
111 if (failed > 0) throw new Exception("Some tests failed");
112 }
113 }