Java IO:IO流中的flush方法 .(七)

2014-11-24 09:14:55 · 作者: · 浏览: 6
ing() == 1) {
haveLeftoverChar = true;
leftoverChar = cb.get();
}
break;
}
if (cr.isOverflow()) {
assert bb.position() > 0;
writeBytes();
continue;
}
cr.throwException();
}
}

void implFlushBuffer() throws IOException {
if (bb.position() > 0)
writeBytes();
}

void implFlush() throws IOException {
implFlushBuffer();
if (out != null)
out.flush();
}

void implClose() throws IOException {
flushLeftoverChar(null, true);
try {
for (;;) {
CoderResult cr = encoder.flush(bb);
if (cr.isUnderflow())
break;
if (cr.isOverflow()) {
assert bb.position() > 0;
writeBytes();
continue;
}
cr.throwException();
}

if (bb.position() > 0)
writeBytes();
if (ch != null)
ch.close();
else
out.close();
} catch (IOException x) {
encoder.reset();
throw x;
}
}

String encodingName() {
return ((cs instanceof HistoricallyNamedCharset)
((HistoricallyNamedCharset)cs).historicalName()
: cs.name());
}
[java]
/*
* Copyright 2001-2005 Sun Microsystems, Inc. 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. Sun designates this
* particular file as subject to the "Classpath" exception as provided
* by Sun in the LICENSE file that accompanied this code.
*
* 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*/



package sun.nio.cs;

import java.io;
import java.nio;
import java.nio.channels;
import java.nio.charset;

public class StreamEncoder extends Writer
{

private static final int DEFAULT_BYTE_BUFFER_SIZE = 8192;

private volatile boolean isOpen = true;

private void ensureOpen() throws IOException {
if (!isOpen)
throw new IOException("Stream closed");
}

// Factories for java.io.OutputStreamWriter
public static StreamEncoder forOutputStreamWriter(OutputStream out,
Object lock,
String charsetName)
throws UnsupportedEncodingException
{
String csn = charsetName;
if (csn == null)
csn