/*

 * reserved comment block

 * DO NOT REMOVE OR ALTER!

 */

/*

 * 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.

 */

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.

   *

   * <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;

  }

}