--- a/jdk/src/java.base/share/classes/sun/misc/CharacterDecoder.java Mon Dec 21 17:47:21 2015 +0100
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,218 +0,0 @@
-/*
- * Copyright (c) 1995, 2013, 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 sun.misc;
-
-import java.io.OutputStream;
-import java.io.ByteArrayOutputStream;
-import java.io.InputStream;
-import java.io.PushbackInputStream;
-import java.io.ByteArrayInputStream;
-import java.io.IOException;
-import java.nio.ByteBuffer;
-
-/**
- * This class defines the decoding half of character encoders.
- * A character decoder is an algorithim for transforming 8 bit
- * binary data that has been encoded into text by a character
- * encoder, back into original binary form.
- *
- * The character encoders, in general, have been structured
- * around a central theme that binary data can be encoded into
- * text that has the form:
- *
- * <pre>
- * [Buffer Prefix]
- * [Line Prefix][encoded data atoms][Line Suffix]
- * [Buffer Suffix]
- * </pre>
- *
- * Of course in the simplest encoding schemes, the buffer has no
- * distinct prefix of suffix, however all have some fixed relationship
- * between the text in an 'atom' and the binary data itself.
- *
- * In the CharacterEncoder and CharacterDecoder classes, one complete
- * chunk of data is referred to as a <i>buffer</i>. Encoded buffers
- * are all text, and decoded buffers (sometimes just referred to as
- * buffers) are binary octets.
- *
- * To create a custom decoder, you must, at a minimum, overide three
- * abstract methods in this class.
- * <DL>
- * <DD>bytesPerAtom which tells the decoder how many bytes to
- * expect from decodeAtom
- * <DD>decodeAtom which decodes the bytes sent to it as text.
- * <DD>bytesPerLine which tells the encoder the maximum number of
- * bytes per line.
- * </DL>
- *
- * In general, the character decoders return error in the form of a
- * CEFormatException. The syntax of the detail string is
- * <pre>
- * DecoderClassName: Error message.
- * </pre>
- *
- * Several useful decoders have already been written and are
- * referenced in the See Also list below.
- *
- * @author Chuck McManis
- * @see CEFormatException
- * @see CharacterEncoder
- * @see UCDecoder
- * @see UUDecoder
- * @see BASE64Decoder
- */
-
-public abstract class CharacterDecoder {
-
- /** Return the number of bytes per atom of decoding */
- protected abstract int bytesPerAtom();
-
- /** Return the maximum number of bytes that can be encoded per line */
- protected abstract int bytesPerLine();
-
- /** decode the beginning of the buffer, by default this is a NOP. */
- protected void decodeBufferPrefix(PushbackInputStream aStream, OutputStream bStream) throws IOException { }
-
- /** decode the buffer suffix, again by default it is a NOP. */
- protected void decodeBufferSuffix(PushbackInputStream aStream, OutputStream bStream) throws IOException { }
-
- /**
- * This method should return, if it knows, the number of bytes
- * that will be decoded. Many formats such as uuencoding provide
- * this information. By default we return the maximum bytes that
- * could have been encoded on the line.
- */
- protected int decodeLinePrefix(PushbackInputStream aStream, OutputStream bStream) throws IOException {
- return (bytesPerLine());
- }
-
- /**
- * This method post processes the line, if there are error detection
- * or correction codes in a line, they are generally processed by
- * this method. The simplest version of this method looks for the
- * (newline) character.
- */
- protected void decodeLineSuffix(PushbackInputStream aStream, OutputStream bStream) throws IOException { }
-
- /**
- * This method does an actual decode. It takes the decoded bytes and
- * writes them to the OutputStream. The integer <i>l</i> tells the
- * method how many bytes are required. This is always {@literal <=} bytesPerAtom().
- */
- protected void decodeAtom(PushbackInputStream aStream, OutputStream bStream, int l) throws IOException {
- throw new CEStreamExhausted();
- }
-
- /**
- * This method works around the bizarre semantics of BufferedInputStream's
- * read method.
- */
- protected int readFully(InputStream in, byte buffer[], int offset, int len)
- throws java.io.IOException {
- for (int i = 0; i < len; i++) {
- int q = in.read();
- if (q == -1)
- return ((i == 0) ? -1 : i);
- buffer[i+offset] = (byte)q;
- }
- return len;
- }
-
- /**
- * Decode the text from the InputStream and write the decoded
- * octets to the OutputStream. This method runs until the stream
- * is exhausted.
- * @exception CEFormatException An error has occurred while decoding
- * @exception CEStreamExhausted The input stream is unexpectedly out of data
- */
- public void decodeBuffer(InputStream aStream, OutputStream bStream) throws IOException {
- int i;
- int totalBytes = 0;
-
- PushbackInputStream ps = new PushbackInputStream (aStream);
- decodeBufferPrefix(ps, bStream);
- while (true) {
- int length;
-
- try {
- length = decodeLinePrefix(ps, bStream);
- for (i = 0; (i+bytesPerAtom()) < length; i += bytesPerAtom()) {
- decodeAtom(ps, bStream, bytesPerAtom());
- totalBytes += bytesPerAtom();
- }
- if ((i + bytesPerAtom()) == length) {
- decodeAtom(ps, bStream, bytesPerAtom());
- totalBytes += bytesPerAtom();
- } else {
- decodeAtom(ps, bStream, length - i);
- totalBytes += (length - i);
- }
- decodeLineSuffix(ps, bStream);
- } catch (CEStreamExhausted e) {
- break;
- }
- }
- decodeBufferSuffix(ps, bStream);
- }
-
- /**
- * Alternate decode interface that takes a String containing the encoded
- * buffer and returns a byte array containing the data.
- * @exception CEFormatException An error has occurred while decoding
- */
- public byte[] decodeBuffer(String inputString) throws IOException {
- byte inputBuffer[] = inputString.getBytes("ISO-8859-1");
- ByteArrayInputStream inStream = new ByteArrayInputStream(inputBuffer);
- ByteArrayOutputStream outStream = new ByteArrayOutputStream();
- decodeBuffer(inStream, outStream);
- return outStream.toByteArray();
- }
-
- /**
- * Decode the contents of the inputstream into a buffer.
- */
- public byte[] decodeBuffer(InputStream in) throws IOException {
- ByteArrayOutputStream outStream = new ByteArrayOutputStream();
- decodeBuffer(in, outStream);
- return outStream.toByteArray();
- }
-
- /**
- * Decode the contents of the String into a ByteBuffer.
- */
- public ByteBuffer decodeBufferToByteBuffer(String inputString)
- throws IOException {
- return ByteBuffer.wrap(decodeBuffer(inputString));
- }
-
- /**
- * Decode the contents of the inputStream into a ByteBuffer.
- */
- public ByteBuffer decodeBufferToByteBuffer(InputStream in)
- throws IOException {
- return ByteBuffer.wrap(decodeBuffer(in));
- }
-}