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/*
* 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()
* @modules jdk.charsets
* @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()];
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");
}
}
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