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/*
 * $Id: WriterToASCI.java,v 1.8 2010-11-01 04:34:45 joehw Exp $
 */
package com.sun.org.apache.xml.internal.serializer;

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



/**
 * This class writes ASCII to a byte stream as quickly as possible.  For the
 * moment it does not do buffering, though I reserve the right to do some
 * buffering down the line if I can prove that it will be faster even if the
 * output stream is buffered.
 * 
 * This class is only used internally within Xalan.
 * 
 * @xsl.usage internal
 */
class WriterToASCI extends Writer implements WriterChain
{

  /** The byte stream to write to.  */
  private final OutputStream m_os;

  /**
   * Create an unbuffered ASCII writer.
   *
   *
   * @param os The byte stream to write to.
   */
  public WriterToASCI(OutputStream os)
  {
    m_os = os;
  }

  /**
   * Write a portion of an array of characters.
   *
   * @param  chars  Array of characters
   * @param  start   Offset from which to start writing characters
   * @param  length   Number of characters to write
   *
   * @exception  IOException  If an I/O error occurs
   *
   * @throws java.io.IOException
   */
  public void write(char chars[], int start, int length)
          throws java.io.IOException
  {

    int n = length+start;

    for (int i = start; i < n; i++)
    {
      m_os.write(chars[i]);
    }
  }

  /**
   * Write a single character.  The character to be written is contained in
   * the 16 low-order bits of the given integer value; the 16 high-order bits
   * are ignored.
   *
   * 

Subclasses that intend to support efficient single-character output * should override this method. * * @param c int specifying a character to be written. * @exception IOException If an I/O error occurs */ public void write(int c) throws IOException { m_os.write(c); } /** * Write a string. * * @param s String to be written * * @exception IOException If an I/O error occurs */ public void write(String s) throws IOException { int n = s.length(); for (int i = 0; i < n; i++) { m_os.write(s.charAt(i)); } } /** * Flush the stream. If the stream has saved any characters from the * various write() methods in a buffer, write them immediately to their * intended destination. Then, if that destination is another character or * byte stream, flush it. Thus one flush() invocation will flush all the * buffers in a chain of Writers and OutputStreams. * * @exception IOException If an I/O error occurs */ public void flush() throws java.io.IOException { m_os.flush(); } /** * Close the stream, flushing it first. Once a stream has been closed, * further write() or flush() invocations will cause an IOException to be * thrown. Closing a previously-closed stream, however, has no effect. * * @exception IOException If an I/O error occurs */ public void close() throws java.io.IOException { m_os.close(); } /** * Get the output stream where the events will be serialized to. * * @return reference to the result stream, or null of only a writer was * set. */ public OutputStream getOutputStream() { return m_os; } /** * Get the writer that this writer directly chains to. */ public Writer getWriter() { return null; } }





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