code: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements. See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership. The ASF licenses this file
   * to you under the Apache License, Version 2.0 (the  "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  /*
   * $Id$
   */
  package org.apache.xml.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.
     *
     * <p> 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;
    }
  }
  