serializertoxml.java

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

      {
        if (m_writer instanceof WriterToUTF8Buffered)
        {
          if(m_shouldFlush)
            ((WriterToUTF8Buffered) m_writer).flush();
          else
            ((WriterToUTF8Buffered) m_writer).flushBuffer();
        }
        if (m_writer instanceof WriterToUTF8)
        {
          if(m_shouldFlush)
            m_writer.flush(); 
        }
        else if (m_writer instanceof WriterToASCI)
        {
          if(m_shouldFlush)
            m_writer.flush();
        }
        else
        {
          // Flush always. 
          // Not a great thing if the writer was created 
          // by this class, but don't have a choice.
          m_writer.flush(); 
        }
      }
      catch (IOException ioe)
      {
        throw new org.xml.sax.SAXException(ioe);
      }
    }
  }

  /**
   * Receive notification of character data.
   *
   * <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 chars 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 characters(char chars[], int start, int length)
          throws org.xml.sax.SAXException
  {
    if(0 == length)
      return;

    //    if (m_inEntityRef)
    //      return;
    //    else 
    if (m_inCData || m_cdataSectionStates.peekOrFalse())
    {
      cdata(chars, start, length);

      return;
    }
    
    try
    {
      
      if (m_disableOutputEscapingStates.peekOrFalse())
      {
        charactersRaw(chars, start, length);
  
        return;
      }
    
      final Writer writer = m_writer;
      if (!m_elemStack.peekOrTrue())
      {
        writer.write('>');
  
        m_isprevtext = false;
  
        m_elemStack.setTop(true);
        m_preserves.push(m_ispreserve);
      }
  
      int startClean = start;
      int lengthClean = 0;
  
      // int pos = 0;
      int end = start + length;
      boolean checkWhite = true;
      final int maxCharacter = m_maxCharacter;
      final BitSet specialsMap = m_charInfo.m_specialsMap;
  
      for (int i = start; i < end; i++)
      {
        char ch = chars[i];
  
        if (checkWhite
                && ((ch > 0x20)
                    ||!((ch == 0x20) || (ch == 0x09) || (ch == 0xD)
                        || (ch == 0xA))))
        {
          m_ispreserve = true;
          checkWhite = false;
        }
  
        if ((canConvert(ch) && (!specialsMap.get(ch))) || ('"' == ch))
        {
          lengthClean++;
        }
        else
        {
          if (lengthClean > 0)
          {
            writer.write(chars, startClean, lengthClean);
  
            lengthClean = 0;
          }
  
          if (CharInfo.S_LINEFEED == ch)
          {
            writer.write(m_lineSep, 0, m_lineSepLen);
  
            startClean = i + 1;
          }
          else
          {
            startClean = accumDefaultEscape(ch, i, chars, end, false);
            i = startClean - 1;
          }
        }
      }
  
      if (lengthClean > 0)
      {
        writer.write(chars, startClean, lengthClean);
      }
    
    }
    catch(IOException ioe)
    {
      throw new SAXException(ioe);
    }


    m_isprevtext = true;
  }

  /**
   * If available, when the disable-output-escaping attribute is used,
   * output raw text without escaping.
   *
   * @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
   */
  public void charactersRaw(char ch[], int start, int length)
          throws org.xml.sax.SAXException
  {

    try
    {
      if (m_inEntityRef)
        return;
  
      writeParentTagEnd();
  
      m_ispreserve = true;
  
      m_writer.write(ch, start, length);
    }
    catch(IOException ioe)
    {
      throw new SAXException(ioe);
    }
  }

  /**
   * Return true if the character is the high member of a surrogate pair.
   *
   * NEEDSDOC @param c
   *
   * NEEDSDOC ($objectName$) @return
   */
  static final boolean isUTF16Surrogate(char c)
  {
    return (c & 0xFC00) == 0xD800;
  }

  /**
   * Once a surrogate has been detected, get the pair as a single
   * integer value.
   *
   * @param c the first part of the surrogate.
   * @param ch Character array.
   * @param i position Where the surrogate was detected.
   * @param end The end index of the significant characters.
   * @return i+1.
   * @throws org.xml.sax.SAXException if invalid UTF-16 surrogate detected.
   */
  int getURF16SurrogateValue(char c, char ch[], int i, int end)
          throws org.xml.sax.SAXException
  {

    int next;

    if (i + 1 >= end)
    {
      throw new org.xml.sax.SAXException(
        XSLMessages.createXPATHMessage(
          XPATHErrorResources.ER_INVALID_UTF16_SURROGATE,
          new Object[]{ Integer.toHexString((int) c) }));  //"Invalid UTF-16 surrogate detected: "

      //+Integer.toHexString((int)c)+ " ?");
    }
    else
    {
      next = ch[++i];

      if (!(0xdc00 <= next && next < 0xe000))
        throw new org.xml.sax.SAXException(
          XSLMessages.createXPATHMessage(
            XPATHErrorResources.ER_INVALID_UTF16_SURROGATE,
            new Object[]{
              Integer.toHexString((int) c) + " "
              + Integer.toHexString(next) }));  //"Invalid UTF-16 surrogate detected: "

      //+Integer.toHexString((int)c)+" "+Integer.toHexString(next));
      next = ((c - 0xd800) << 10) + next - 0xdc00 + 0x00010000;
    }

    return next;
  }

  /**
   * Once a surrogate has been detected, write the pair as a single
   * character reference.
   *
   * @param c the first part of the surrogate.
   * @param ch Character array.
   * @param i position Where the surrogate was detected.
   * @param end The end index of the significant characters.
   * @return i+1.
   * @throws IOException
   * @throws org.xml.sax.SAXException if invalid UTF-16 surrogate detected.
   */
  protected int writeUTF16Surrogate(char c, char ch[], int i, int end)
          throws IOException, org.xml.sax.SAXException
  {

    // UTF-16 surrogate
    int surrogateValue = getURF16SurrogateValue(c, ch, i, end);

    i++;

    m_writer.write('&');
    m_writer.write('#');

    // m_writer.write('x');
    m_writer.write(Integer.toString(surrogateValue));
    m_writer.write(';');

    return i;
  }

  /**
   * Normalize the characters, but don't escape.
   *
   * @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.
   * @param isCData true if a CDATA block should be built around the characters.
   *
   * @throws IOException
   * @throws org.xml.sax.SAXException
   */
  void writeNormalizedChars(char ch[], int start, int length, boolean isCData)
          throws IOException, org.xml.sax.SAXException
  {

    int end = start + length;

    for (int i = start; i < end; i++)
    {
      char c = ch[i];

      if (CharInfo.S_LINEFEED == c)
      {
        m_writer.write(m_lineSep, 0, m_lineSepLen);
      }
      else if (isCData && (!canConvert(c)))
      {
        if (i != 0)
          m_writer.write("]]>");

        // This needs to go into a function... 
        if (isUTF16Surrogate(c))
        {
          i = writeUTF16Surrogate(c, ch, i, end);
        }
        else
        {
          m_writer.write("&#");

          String intStr = Integer.toString((int) c);

          m_writer.write(intStr);
          m_writer.write(';');
        }

        if ((i != 0) && (i < (end - 1)))
          m_writer.write("<![CDATA[");
      }
      else if (isCData
               && ((i < (end - 2)) && (']' == c) && (']' == ch[i + 1])
                   && ('>' == ch[i + 2])))
      {
        m_writer.write("]]]]><![CDATA[>");

        i += 2;
      }
      else
      {
        if (canConvert(c))
        {
          m_writer.write(c);
        }

        // This needs to go into a function... 
        else if (isUTF16Surrogate(c))
        {
          i = writeUTF16Surrogate(c, ch, i, end);
        }
        else
        {
          m_writer.write("&#");

          String intStr = Integer.toString((int) c);

          m_writer.write(intStr);
          m_writer.write(';');
        }
      }
    }
  }

  /**
   * Receive notification of ignorable whitespace in element content.
   *
   * Not sure how to get this invoked quite yet.
   *
   * @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 #characters
   *
   * @throws org.xml.sax.SAXException
   */
  public void ignorableWhitespace(char ch[], int start, int length)
          throws org.xml.sax.SAXException
  {

    if (0 == length)
      return;

    characters(ch, start, length);
  }

  /**
   * Receive notification of a skipped entity.
   * @see org.xml.sax.ContentHandler#skippedEntity
   *
   * @param name The name of the skipped entity.  If it is a
   *        parameter entity, the name will begin with '%', and if
   *        it is the external DTD subset, it will be the string
   *        "[dtd]".
   * @throws org.xml.sax.SAXException Any SAX exception, possibly
   *            wrapping another exception.
   */
  public void skippedEntity(String name) throws org.xml.sax.SAXException
  {

    // TODO: Should handle
  }

  /**
   * Report the beginning of an entity.
   *
   * The start and end of the document entity are not reported.
   * The start and end of the external DTD subset are reported
   * using the pseudo-name "[dtd]".  All other events must be
   * properly nested within start/end entity events.
   *
   * @param name The name of the entity.  If it is a parameter
   *        entity, the name will begin with '%'.
   * @throws org.xml.sax.SAXException The application may raise an exception.
   * @see #endEntity
   * @see org.xml.sax.ext.DeclHandler#internalEntityDecl
   * @see org.xml.sax.ext.DeclHandler#externalEntityDecl
   */
  public void startEntity(String name) throws org.xml.sax.SAXException
  {
    if (name.equals("[dtd]")) 
      m_inExternalDTD = true;
    m_inEntityRef = true;
  }

  /**
   * Report the end of an entity.
   *
   * @param name The name of the entity that is ending.
   * @throws org.xml.sax.SAXException The application may raise an exception.
   * @see #startEntity
   */
  public void endEntity(String name) throws org.xml.sax.SAXException
  {
    if (name.equals("[dtd]")) 
      m_inExternalDTD = false;
    m_inEntityRef = false;
  }

  /**
   * Receive notivication of a entityReference.
   *
   * @param name The name of the entity.
   *
   * @throws org.xml.sax.SAXException
   */
  public void entityReference(String name) throws org.xml.sax.SAXException
  {
    writeParentTagEnd();

    if (shouldIndent())
      indent(m_currentIndent);

    try
    {
      final Writer writer = m_writer;
      writer.write("&");
      writer.write(name);
      writer.write(";");
    }
    catch(IOException ioe)
    {
      throw new SAXException(ioe);
    }

  }

  // Implement DeclHandler

  /**
   *   Report an element type declaration.
   *  
   *   <p>The content model will consist of the string "EMPTY", the
   *   string "ANY", or a parenthesised group, optionally followed
   *   by an occurrence indicator.  The model will be normalized so
   *   that all whitespace is removed,and will include the enclosing
   *   parentheses.</p>
   *  
   *   @param name The element type name.
   *   @param model The content model as a normalized string.
   *   @exception SAXException The application may raise an exception.
   */
  public void elementDecl(String name, String model) throws SAXException
  {
    // Do not inline external DTD
    if (m_inExternalDTD) return; 
    
    try
    {
      final Writer writer = m_writer;
      if (m_inDoctype)
      {
        writer.write(" [");