serializertoxml.java

来自「java jdk 1.4的源码」· Java 代码 · 共 2,458 行 · 第 1/5 页

      catch(IOException ioe)
      {
        throw new SAXException(ioe);
      }

      m_isprevtext = false;

      m_elemStack.setTop(true);
      m_preserves.push(m_ispreserve);
    }
  }

  /**
   * Flag the current element as not yet having any
   * children.
   */
  protected void openElementForChildren()
  {

    // Flag the current element as not yet having any children.
    m_elemStack.push(false);
  }

  /**
   * Tell if child nodes have been added to the current
   * element.  Must be called in balance with openElementForChildren().
   *
   * @return true if child nodes were added.
   */
  protected boolean childNodesWereAdded()
  {
    return m_elemStack.isEmpty() ? false : m_elemStack.pop();
  }

  /**
   * Receive notification of the end of an element.
   *
   *
   * @param namespaceURI The Namespace URI, or the empty string if the
   *        element has no Namespace URI or if Namespace
   *        processing is not being performed.
   * @param localName The local name (without prefix), or the
   *        empty string if Namespace processing is not being
   *        performed.
   * @param name The element type name
   * @throws org.xml.sax.SAXException Any SAX exception, possibly
   *            wrapping another exception.
   *
   * @throws org.xml.sax.SAXException
   */
  public void endElement(String namespaceURI, String localName, String name)
          throws org.xml.sax.SAXException
  {

    if (m_inEntityRef)
      return;

    m_currentIndent -= m_indentAmount;

    boolean hasChildNodes = childNodesWereAdded();

    try
    {
      final Writer writer = m_writer;
      if (hasChildNodes)
      {
        if (shouldIndent())
          indent(m_currentIndent);
  
        writer.write('<');
        writer.write('/');
        writer.write(name);
        writer.write('>');
      }
      else
      {
        if (m_spaceBeforeClose)
          writer.write(" />");
        else
          writer.write("/>");
      }
    }
    catch(IOException ioe)
    {
      throw new SAXException(ioe);
    }

    if (hasChildNodes)
    {
      m_ispreserve = m_preserves.isEmpty() ? false : m_preserves.pop();
    }

    m_isprevtext = false;

    // m_disableOutputEscapingStates.pop();
    m_cdataSectionStates.pop();
  }

  /**
   * Process an attribute.
   * @param   name   The name of the attribute.
   * @param   value   The value of the attribute.
   *
   * @throws org.xml.sax.SAXException
   */
  protected void processAttribute(String name, String value)
          throws org.xml.sax.SAXException
  {
    try
    {
      final Writer writer = m_writer;
      writer.write(' ');
      writer.write(name);
      writer.write("=\"");
      writeAttrString(value, m_encoding);
      writer.write('\"');
    }
    catch(IOException ioe)
    {
      throw new SAXException(ioe);
    }
  }

  /**
   * Starts an un-escaping section. All characters printed within an
   * un-escaping section are printed as is, without escaping special
   * characters into entity references. Only XML and HTML serializers
   * need to support this method.
   * <p>
   * The contents of the un-escaping section will be delivered through
   * the regular <tt>characters</tt> event.
   *
   * @throws org.xml.sax.SAXException
   */
  public void startNonEscaping() throws org.xml.sax.SAXException
  {
    m_disableOutputEscapingStates.push(true);
  }

  /**
   * Ends an un-escaping section.
   *
   * @see #startNonEscaping
   *
   * @throws org.xml.sax.SAXException
   */
  public void endNonEscaping() throws org.xml.sax.SAXException
  {
    m_disableOutputEscapingStates.pop();
  }

  /**
   * Starts a whitespace preserving section. All characters printed
   * within a preserving section are printed without indentation and
   * without consolidating multiple spaces. This is equivalent to
   * the <tt>xml:space=&quot;preserve&quot;</tt> attribute. Only XML
   * and HTML serializers need to support this method.
   * <p>
   * The contents of the whitespace preserving section will be delivered
   * through the regular <tt>characters</tt> event.
   *
   * @throws org.xml.sax.SAXException
   */
  public void startPreserving() throws org.xml.sax.SAXException
  {

    // Not sure this is really what we want.  -sb
    m_preserves.push(true);

    m_ispreserve = true;
  }

  /**
   * Ends a whitespace preserving section.
   *
   * @see #startPreserving
   *
   * @throws org.xml.sax.SAXException
   */
  public void endPreserving() throws org.xml.sax.SAXException
  {

    // Not sure this is really what we want.  -sb
    m_ispreserve = m_preserves.isEmpty() ? false : m_preserves.pop();
  }

  /**
   * Receive notification of a processing instruction.
   *
   * @param target The processing instruction target.
   * @param data The processing instruction data, or null if
   *        none was supplied.
   * @throws org.xml.sax.SAXException Any SAX exception, possibly
   *            wrapping another exception.
   *
   * @throws org.xml.sax.SAXException
   */
  public void processingInstruction(String target, String data)
          throws org.xml.sax.SAXException
  {
    if (m_inEntityRef)
      return;

    if (target.equals(Result.PI_DISABLE_OUTPUT_ESCAPING))
    {
      startNonEscaping();
    }
    else if (target.equals(Result.PI_ENABLE_OUTPUT_ESCAPING))
    {
      endNonEscaping();
    }
    else
    {
      try
      {
        final Writer writer = m_writer;
        writeParentTagEnd();
  
        if (shouldIndent())
          indent(m_currentIndent);
  
        writer.write('<');
        writer.write('?');
        writer.write(target);
  
        if (data.length() > 0 &&!Character.isSpaceChar(data.charAt(0)))
          writer.write(' ');
  
        int indexOfQLT = data.indexOf("?>");
  
        if (indexOfQLT >= 0)
        {
  
          // See XSLT spec on error recovery of "?>" in PIs.
          if (indexOfQLT > 0)
          {
            writer.write(data.substring(0, indexOfQLT));
          }
  
          writer.write("? >");  // add space between.
  
          if ((indexOfQLT + 2) < data.length())
          {
            writer.write(data.substring(indexOfQLT + 2));
          }
        }
        else
        {
          writer.write(data);
        }
  
        writer.write('?');
        writer.write('>');
  
        // Always output a newline char if not inside of an 
        // element. The whitespace is not significant in that
        // case.
        if (m_elemStack.isEmpty())
          writer.write(m_lineSep, 0, m_lineSepLen);
  
        m_startNewLine = true;
      }
      catch(IOException ioe)
      {
        throw new SAXException(ioe);
      }
    }
  }

  /**
   * Report an XML comment anywhere in the document.
   *
   * This callback will be used for comments inside or outside the
   * document element, including comments in the external DTD
   * subset (if read).
   *
   * @param ch An array holding the characters in the comment.
   * @param start The starting position in the array.
   * @param length The number of characters to use from the array.
   * @throws org.xml.sax.SAXException The application may raise an exception.
   */
  public void comment(char ch[], int start, int length)
          throws org.xml.sax.SAXException
  {

    if (m_inEntityRef)
      return;

    writeParentTagEnd();

    if (shouldIndent())
      indent(m_currentIndent);

    try
    {
      final Writer writer = m_writer;
      final int limit = start + length;
      boolean wasDash = false;
      writer.write("<!--");

      // Detect occurrences of two consecutive dashes, handle as necessary.
      for (int i = start; i < limit; i++) {
        if (wasDash && ch[i] == '-') {
          writer.write(ch, start, i - start);
          writer.write(" -");
          start = i + 1;     	  
        }
        wasDash = (ch[i] == '-');
      }      	 
      
      // Output the remaining characters.
      writer.write(ch, start, limit - start);
      // Protect comment end from a single trailing dash
      if (ch[limit-1] == '-')
        writer.write(' ');

      writer.write("-->");
    }
    catch(IOException ioe)
    {
      throw new SAXException(ioe);
    }

    m_startNewLine = true;
  }

  /**
   * Report the start of a CDATA section.
   *
   * @throws org.xml.sax.SAXException The application may raise an exception.
   * @see #endCDATA
   */
  public void startCDATA() throws org.xml.sax.SAXException
  {
    m_inCData = true;
  }

  /**
   * Report the end of a CDATA section.
   *
   * @throws org.xml.sax.SAXException The application may raise an exception.
   * @see #startCDATA
   */
  public void endCDATA() throws org.xml.sax.SAXException
  {
    m_inCData = false;
  }

  /**
   * Receive notification of cdata.
   *
   * <p>The Parser will call this method to report each chunk of
   * character data.  SAX parsers may return all contiguous character
   * data in a single chunk, or they may split it into several
   * chunks; however, all of the characters in any single event
   * must come from the same external entity, so that the Locator
   * provides useful information.</p>
   *
   * <p>The application must not attempt to read from the array
   * outside of the specified range.</p>
   *
   * <p>Note that some parsers will report whitespace using the
   * ignorableWhitespace() method rather than this one (validating
   * parsers must do so).</p>
   *
   * @param ch The characters from the XML document.
   * @param start The start position in the array.
   * @param length The number of characters to read from the array.
   * @throws org.xml.sax.SAXException Any SAX exception, possibly
   *            wrapping another exception.
   * @see #ignorableWhitespace
   * @see org.xml.sax.Locator
   *
   * @throws org.xml.sax.SAXException
   */
  public void cdata(char ch[], int start, int length)
          throws org.xml.sax.SAXException
  {

    try
    {
      writeParentTagEnd();

      m_ispreserve = true;

      if (shouldIndent())
        indent(m_currentIndent);

      boolean writeCDataBrackets = (((length >= 1) && canConvert(ch[start])));

      if (writeCDataBrackets)
      {
        m_writer.write("<![CDATA[");
      }

      // m_writer.write(ch, start, length);
      if (isEscapingDisabled())
      {
        charactersRaw(ch, start, length);
      }
      else
        writeNormalizedChars(ch, start, length, true);

      if (writeCDataBrackets)
      {
        m_writer.write("]]>");
      }
    }
    catch (IOException ioe)
    {
      throw new org.xml.sax.SAXException(
        XSLMessages.createXPATHMessage(XPATHErrorResources.ER_OIERROR, null),
        ioe);  //"IO error", ioe);
    }
  }

  /** The current position in the m_charBuf or m_byteBuf. */
  protected int m_pos = 0;

  /**
   * Append a character to the buffer.
   *
   * @param b byte to be written to result stream.
   *
   * @throws org.xml.sax.SAXException
   */
  protected final void accum(char b) throws org.xml.sax.SAXException
  {

    try
    {
      m_writer.write(b);
    }
    catch(IOException ioe)
    {
      throw new SAXException(ioe);
    }
  }
  
  /**
   * Append a character to the buffer.
   *
   * @param chars non-null reference to character array.
   * @param start Start of characters to be written.
   * @param length Number of characters to be written.
   *
   * @throws org.xml.sax.SAXException
   */
  protected final void accum(char chars[], int start, int length)
          throws org.xml.sax.SAXException
  {

    try
    {
      m_writer.write(chars, start, length);
    }
    catch(IOException ioe)
    {
      throw new SAXException(ioe);
    }
  }
  /**
   * Append a character to the buffer.
   *
   * @param s non-null reference to string to be written to the character buffer.
   *
   * @throws org.xml.sax.SAXException
   */
  protected final void accum(String s) throws org.xml.sax.SAXException
  {

    try
    {
      m_writer.write(s);
    }
    catch(IOException ioe)
    {
      throw new SAXException(ioe);
    }
  }

  /**
   * Flush the formatter's result stream.
   *
   * @throws org.xml.sax.SAXException
   */
  public final void flushWriter() throws org.xml.sax.SAXException
  {

    if (null != m_writer)
    {
      try