| /* |
| * Copyright (c) 2010, 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. |
| */ |
| |
| /* @test |
| * @bug 6227608 |
| * @summary Test proper handling of flush() |
| * @author Martin Buchholz |
| */ |
| |
| import java.util.*; |
| import java.io.*; |
| import java.nio.*; |
| import java.nio.charset.*; |
| |
| public class Flush { |
| private static byte[] contents(ByteBuffer bb) { |
| byte[] contents = new byte[bb.position()]; |
| ((ByteBuffer)(bb.duplicate().flip())).get(contents); |
| return contents; |
| } |
| |
| private static ByteBuffer extend(ByteBuffer bb) { |
| ByteBuffer x = ByteBuffer.allocate(2*bb.capacity()+10); |
| bb.flip(); |
| x.put(bb); |
| return x; |
| } |
| |
| private static void realMain(String[] args) throws Throwable { |
| // A japanese character should decode as a 3-byte |
| // switch-to-japanese escape sequence, followed by a 2-byte |
| // encoding of the char itself, followed by a 3-byte return to |
| // ASCII escape sequence. |
| char[] jis0208 = {'\u3001'}; |
| CharBuffer cb = CharBuffer.wrap(jis0208); |
| ByteBuffer bb = ByteBuffer.allocate(6); |
| CharsetEncoder enc = Charset.forName("ISO-2022-JP").newEncoder(); |
| |
| check(enc.encode(cb, bb, true).isUnderflow()); |
| |
| System.out.println(Arrays.toString(contents(bb))); |
| check(! cb.hasRemaining()); |
| equal(contents(bb).length, 3 + 2); |
| equal(bb.get(0), (byte)0x1b); |
| |
| //---------------------------------------------------------------- |
| // We must be able to recover if flush() returns OVERFLOW |
| //---------------------------------------------------------------- |
| check(enc.flush(bb).isOverflow()); |
| check(enc.flush(bb).isOverflow()); |
| equal(contents(bb).length, 3 + 2); |
| |
| bb = extend(bb); |
| |
| check(enc.flush(bb).isUnderflow()); |
| equal(bb.get(3 + 2), (byte)0x1b); |
| System.out.println(Arrays.toString(contents(bb))); |
| equal(contents(bb).length, 3 + 2 + 3); |
| |
| //---------------------------------------------------------------- |
| // A final redundant flush() is a no-op |
| //---------------------------------------------------------------- |
| check(enc.flush(bb).isUnderflow()); |
| check(enc.flush(bb).isUnderflow()); |
| equal(contents(bb).length, 3 + 2 + 3); |
| |
| //---------------------------------------------------------------- |
| // CharsetEncoder.encode(ByteBuffer) must call flush(ByteBuffer) |
| //---------------------------------------------------------------- |
| bb = enc.encode(CharBuffer.wrap(jis0208)); |
| byte[] expected = "\u001b$B!\"\u001b(B".getBytes("ASCII"); |
| byte[] contents = new byte[bb.limit()]; bb.get(contents); |
| check(Arrays.equals(contents, expected)); |
| } |
| |
| //--------------------- Infrastructure --------------------------- |
| static volatile int passed = 0, failed = 0; |
| static void pass() { passed++; } |
| static void fail() { failed++; Thread.dumpStack(); } |
| static void fail(String msg) { System.out.println(msg); fail(); } |
| static void unexpected(Throwable t) { failed++; t.printStackTrace(); } |
| static void check(boolean cond) { if (cond) pass(); else fail(); } |
| static void equal(Object x, Object y) { |
| if (x == null ? y == null : x.equals(y)) pass(); |
| else {System.out.println(x + " not equal to " + y); fail(); }} |
| |
| public static void main(String[] args) throws Throwable { |
| try { realMain(args); } catch (Throwable t) { unexpected(t); } |
| |
| System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed); |
| if (failed > 0) throw new Exception("Some tests failed"); |
| } |
| } |