--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.base/share/classes/java/io/OutputStreamWriter.java Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,260 @@
+/*
+ * Copyright (c) 1996, 2016, 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. Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package java.io;
+
+import java.nio.CharBuffer;
+import java.nio.charset.Charset;
+import java.nio.charset.CharsetEncoder;
+import sun.nio.cs.StreamEncoder;
+
+
+/**
+ * An OutputStreamWriter is a bridge from character streams to byte streams:
+ * Characters written to it are encoded into bytes using a specified {@link
+ * java.nio.charset.Charset charset}. The charset that it uses
+ * may be specified by name or may be given explicitly, or the platform's
+ * default charset may be accepted.
+ *
+ * <p> Each invocation of a write() method causes the encoding converter to be
+ * invoked on the given character(s). The resulting bytes are accumulated in a
+ * buffer before being written to the underlying output stream. Note that the
+ * characters passed to the write() methods are not buffered.
+ *
+ * <p> For top efficiency, consider wrapping an OutputStreamWriter within a
+ * BufferedWriter so as to avoid frequent converter invocations. For example:
+ *
+ * <pre>
+ * Writer out
+ * = new BufferedWriter(new OutputStreamWriter(System.out));
+ * </pre>
+ *
+ * <p> A <i>surrogate pair</i> is a character represented by a sequence of two
+ * {@code char} values: A <i>high</i> surrogate in the range '\uD800' to
+ * '\uDBFF' followed by a <i>low</i> surrogate in the range '\uDC00' to
+ * '\uDFFF'.
+ *
+ * <p> A <i>malformed surrogate element</i> is a high surrogate that is not
+ * followed by a low surrogate or a low surrogate that is not preceded by a
+ * high surrogate.
+ *
+ * <p> This class always replaces malformed surrogate elements and unmappable
+ * character sequences with the charset's default <i>substitution sequence</i>.
+ * The {@linkplain java.nio.charset.CharsetEncoder} class should be used when more
+ * control over the encoding process is required.
+ *
+ * @see BufferedWriter
+ * @see OutputStream
+ * @see java.nio.charset.Charset
+ *
+ * @author Mark Reinhold
+ * @since 1.1
+ */
+
+public class OutputStreamWriter extends Writer {
+
+ private final StreamEncoder se;
+
+ /**
+ * Creates an OutputStreamWriter that uses the named charset.
+ *
+ * @param out
+ * An OutputStream
+ *
+ * @param charsetName
+ * The name of a supported
+ * {@link java.nio.charset.Charset charset}
+ *
+ * @exception UnsupportedEncodingException
+ * If the named encoding is not supported
+ */
+ public OutputStreamWriter(OutputStream out, String charsetName)
+ throws UnsupportedEncodingException
+ {
+ super(out);
+ if (charsetName == null)
+ throw new NullPointerException("charsetName");
+ se = StreamEncoder.forOutputStreamWriter(out, this, charsetName);
+ }
+
+ /**
+ * Creates an OutputStreamWriter that uses the default character encoding.
+ *
+ * @param out An OutputStream
+ */
+ public OutputStreamWriter(OutputStream out) {
+ super(out);
+ try {
+ se = StreamEncoder.forOutputStreamWriter(out, this, (String)null);
+ } catch (UnsupportedEncodingException e) {
+ throw new Error(e);
+ }
+ }
+
+ /**
+ * Creates an OutputStreamWriter that uses the given charset.
+ *
+ * @param out
+ * An OutputStream
+ *
+ * @param cs
+ * A charset
+ *
+ * @since 1.4
+ * @spec JSR-51
+ */
+ public OutputStreamWriter(OutputStream out, Charset cs) {
+ super(out);
+ if (cs == null)
+ throw new NullPointerException("charset");
+ se = StreamEncoder.forOutputStreamWriter(out, this, cs);
+ }
+
+ /**
+ * Creates an OutputStreamWriter that uses the given charset encoder.
+ *
+ * @param out
+ * An OutputStream
+ *
+ * @param enc
+ * A charset encoder
+ *
+ * @since 1.4
+ * @spec JSR-51
+ */
+ public OutputStreamWriter(OutputStream out, CharsetEncoder enc) {
+ super(out);
+ if (enc == null)
+ throw new NullPointerException("charset encoder");
+ se = StreamEncoder.forOutputStreamWriter(out, this, enc);
+ }
+
+ /**
+ * Returns the name of the character encoding being used by this stream.
+ *
+ * <p> If the encoding has an historical name then that name is returned;
+ * otherwise the encoding's canonical name is returned.
+ *
+ * <p> If this instance was created with the {@link
+ * #OutputStreamWriter(OutputStream, String)} constructor then the returned
+ * name, being unique for the encoding, may differ from the name passed to
+ * the constructor. This method may return {@code null} if the stream has
+ * been closed. </p>
+ *
+ * @return The historical name of this encoding, or possibly
+ * <code>null</code> if the stream has been closed
+ *
+ * @see java.nio.charset.Charset
+ *
+ * @revised 1.4
+ * @spec JSR-51
+ */
+ public String getEncoding() {
+ return se.getEncoding();
+ }
+
+ /**
+ * Flushes the output buffer to the underlying byte stream, without flushing
+ * the byte stream itself. This method is non-private only so that it may
+ * be invoked by PrintStream.
+ */
+ void flushBuffer() throws IOException {
+ se.flushBuffer();
+ }
+
+ /**
+ * Writes a single character.
+ *
+ * @exception IOException If an I/O error occurs
+ */
+ public void write(int c) throws IOException {
+ se.write(c);
+ }
+
+ /**
+ * Writes a portion of an array of characters.
+ *
+ * @param cbuf Buffer of characters
+ * @param off Offset from which to start writing characters
+ * @param len Number of characters to write
+ *
+ * @throws IndexOutOfBoundsException
+ * If {@code off} is negative, or {@code len} is negative,
+ * or {@code off + len} is negative or greater than the length
+ * of the given array
+ *
+ * @throws IOException If an I/O error occurs
+ */
+ public void write(char cbuf[], int off, int len) throws IOException {
+ se.write(cbuf, off, len);
+ }
+
+ /**
+ * Writes a portion of a string.
+ *
+ * @param str A String
+ * @param off Offset from which to start writing characters
+ * @param len Number of characters to write
+ *
+ * @throws IndexOutOfBoundsException
+ * If {@code off} is negative, or {@code len} is negative,
+ * or {@code off + len} is negative or greater than the length
+ * of the given string
+ *
+ * @throws IOException If an I/O error occurs
+ */
+ public void write(String str, int off, int len) throws IOException {
+ se.write(str, off, len);
+ }
+
+ @Override
+ public Writer append(CharSequence csq, int start, int end) throws IOException {
+ if (csq == null) csq = "null";
+ return append(csq.subSequence(start, end));
+ }
+
+ @Override
+ public Writer append(CharSequence csq) throws IOException {
+ if (csq instanceof CharBuffer) {
+ se.write((CharBuffer) csq);
+ } else {
+ se.write(String.valueOf(csq));
+ }
+ return this;
+ }
+
+ /**
+ * Flushes the stream.
+ *
+ * @exception IOException If an I/O error occurs
+ */
+ public void flush() throws IOException {
+ se.flush();
+ }
+
+ public void close() throws IOException {
+ se.close();
+ }
+}