+
−/*
+
− * This Source Code Form is subject to the terms of the Mozilla Public
+
− * License, v. 2.0.  If a copy of the MPL was not distributed with this
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− * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
− *
+
− * Copyright 1997 - July 2008 CWI, August 2008 - 2019 MonetDB B.V.
+
− */
+
−
+
−package nl.cwi.monetdb.mcl.io;
+
−
+
−import java.io.BufferedWriter;
+
−import java.io.IOException;
+
−import java.io.OutputStream;
+
−import java.io.OutputStreamWriter;
+
−import java.io.UnsupportedEncodingException;
+
−import java.io.Writer;
+
−
+
−/**
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− * Write text to a character-output stream, buffering characters so as
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− * to provide a means for efficient writing of single characters,
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− * arrays, and strings.
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− *
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− * In contrast to the BufferedWriter class, this class' newLine()
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− * method always writes the newline character '\n', regardless the
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− * platform's own notion of line separator.  Apart from that there are
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− * no differences in the behaviour of this class, compared to its parent
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− * class, the BufferedWriter.  A small convenience is built into this
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− * class for cooperation with the BufferedMCLReader, via the
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− * registerReader() method.  It causes the reader to be reset upon each
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− * write performed though this class.  This effectuates the MCL protocol
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− * flow where a write invalidates the state of the read buffers, since
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− * each write must be answered by the server.  That also makes this
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− * class client-oriented when a reader is registered.
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− *
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− * @author Fabian Groffen
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− * @see nl.cwi.monetdb.mcl.net.MapiSocket
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− * @see nl.cwi.monetdb.mcl.io.BufferedMCLReader
+
− */
+
−public class BufferedMCLWriter extends BufferedWriter {
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−	private BufferedMCLReader reader;
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−
+
−	/**
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−	 * Create a buffered character-output stream that uses a
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−	 * default-sized output buffer.
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−	 *
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−	 * @param in A Writer
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−	 */
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−	public BufferedMCLWriter(Writer in) {
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−		super(in);
+
−	}
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−
+
−	/**
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−	 * Create a buffered character-output stream that uses a
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−	 * default-sized output buffer, from an OutputStream.
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−	 *
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−	 * @param in An OutputStream
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−	 * @param enc Encoding
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−	 * @throws UnsupportedEncodingException If encoding is not supported
+
−	 */
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−	public BufferedMCLWriter(OutputStream in, String enc)
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−		throws UnsupportedEncodingException
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−	{
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−		super(new OutputStreamWriter(in, enc));
+
−	}
+
−
+
−	/**
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−	 * Write a line separator.  The line separator string is in this
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−	 * class always the single newline character '\n'.
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−	 *
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−	 * @throws IOException If an I/O error occurs
+
−	 */
+
−	@Override
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−	public void newLine() throws IOException {
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−		write('\n');
+
−	}
+
−
+
−
+
−	/**
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−	 * Registers the given reader in this writer.  A registered reader
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−	 * receives a linetype reset when a line is written from this
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−	 * writer.
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−	 *
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−	 * @param r an BufferedMCLReader
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−	 */
+
−	public void registerReader(BufferedMCLReader r) {
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−		reader = r;
+
−	}
+
−
+
−	/**
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−	 * Write a single line, terminated with a line separator, and flush
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−	 * the stream.  This is a shorthand method for a call to write()
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−	 * and flush().
+
−	 *
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−	 * @param line The line to write
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−	 * @throws IOException If an I/O error occurs
+
−	 */
+
−	public void writeLine(String line) throws IOException {
+
−		write(line);
+
−		flush();
+
−		// reset reader state, last line isn't valid any more now
+
−		if (reader != null)
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−			reader.setLineType(null);
+
−	}
+
−}