com.day.io.WriterOutputStream Maven / Gradle / Ivy

/*
 * $Id: WriterOutputStream.java 12345 2004-08-22 04:56:09Z fielding $
 *
 * Copyright 1997-2004 Day Management AG
 * Barfuesserplatz 6, 4001 Basel, Switzerland
 * All Rights Reserved.
 *
 * This software is the confidential and proprietary information of
 * Day Management AG, ("Confidential Information"). You shall not
 * disclose such Confidential Information and shall use it only in
 * accordance with the terms of the license agreement you entered into
 * with Day.
 */
package com.day.io;

import sun.io.ByteToCharConverter;
import sun.io.MalformedInputException;
import sun.io.ConversionBufferFullException;

import java.io.OutputStream;
import java.io.Writer;
import java.io.IOException;
import java.io.UnsupportedEncodingException;

/**
 * This is a simple wrapper around a writer using a character encoding for the
 * byte to character conversion.
 *
 * @version $Revision: 1.2 $
 * @author tripod
 * @since fennec
 */
public class WriterOutputStream extends OutputStream {

    /** the target writer */
    private Writer out;

    /** the byte to character converter */
    private ByteToCharConverter btc;

    /**
     * Creates a new WriterOutputStream
     * @param writer the underlaying writer
     * @param encoding the character encoding
     * @throws UnsupportedEncodingException
     */
    public WriterOutputStream(Writer writer, String encoding)
            throws UnsupportedEncodingException {
        this.out = writer;
        this.btc = ByteToCharConverter.getConverter(encoding);
    }

    public void write(int b) throws IOException {
        write(new byte[]{(byte)b}, 0 ,1);
    }

    public void write(byte[] b, int off, int len) throws IOException {
        // could be done cooler
        int estCount = btc.getMaxCharsPerByte() * len;
        char[] buffer = new char[estCount];

        int written = btc.convert(b, off, len+off, buffer, 0, buffer.length);
        out.write(buffer, 0, written);
    }

    public void write(byte b[]) throws IOException {
        write(b, 0, b.length);
    }

    public void flush() throws IOException {
        char[] buffer = new char[8192]; // no clue?
        int written = btc.flush(buffer, 0, buffer.length);
        out.write(buffer, 0, written);
        out.flush();
    }
}