serializertoxml.java

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

      catch (javax.xml.transform.TransformerException te)
      {
        throw new org.apache.xml.utils.WrappedRuntimeException(te);
      }
    }
  }

  /**
   * Initialize the serializer with the specified output stream and output format.
   * Must be called before calling any of the serialize methods.
   *
   * @param output The output stream to use
   * @param format The output format
   * @throws UnsupportedEncodingException The encoding specified
   *   in the output format is not supported
   */
  public synchronized void init(OutputStream output, Properties format)
          throws UnsupportedEncodingException
  {

    if (null == format)
    {
      OutputProperties op = new OutputProperties(Method.XML);

      format = op.getProperties();
    }

    m_encoding =
      Encodings.getMimeEncoding(format.getProperty(OutputKeys.ENCODING));

    if (m_encoding.equalsIgnoreCase("UTF-8"))
    {
      m_isUTF8 = true;
      if(output instanceof java.io.BufferedOutputStream)
      {
        init(new WriterToUTF8(output), format, true);
      }
      else if(output instanceof java.io.FileOutputStream)
      {
        init(new WriterToUTF8Buffered(output), format, true);
      }
      else
      {
        // Not sure what to do in this case.  I'm going to be conservative 
        // and not buffer.
        init(new WriterToUTF8(output), format, true);
      }
      
    }
    else if (m_encoding.equals("WINDOWS-1250")
             || m_encoding.equals("US-ASCII") || m_encoding.equals("ASCII"))
    {
      init(new WriterToASCI(output), format, true);
    }
    else
    {
      Writer osw;

      try
      {
        osw = Encodings.getWriter(output, m_encoding);
      }
      catch (UnsupportedEncodingException uee)
      {
        System.out.println("Warning: encoding \"" + m_encoding
                           + "\" not supported" + ", using "
                           + Encodings.DEFAULT_MIME_ENCODING);

        m_encoding = Encodings.DEFAULT_MIME_ENCODING;
        osw = Encodings.getWriter(output, m_encoding);
      }

      m_maxCharacter = Encodings.getLastPrintable(m_encoding);

      init(osw, format, true);
    }
    
  }

  /**
   * Receive an object for locating the origin of SAX document events.
   *
   * @param locator An object that can return the location of
   *                any SAX document event.
   * @see org.xml.sax.Locator
   */
  public void setDocumentLocator(Locator locator)
  {

    // I don't do anything with this yet.
  }

  /**
   * Output the doc type declaration.
   *
   * @param name non-null reference to document type name.
   * NEEDSDOC @param closeDecl
   *
   * @throws org.xml.sax.SAXException
   */
  void outputDocTypeDecl(String name, boolean closeDecl)
          throws org.xml.sax.SAXException
  {
    try
    {
      final Writer writer = m_writer;
  
      writer.write("<!DOCTYPE ");
      writer.write(name);
  
      if (null != m_doctypePublic)
      {
        writer.write(" PUBLIC \"");
        writer.write(m_doctypePublic);
        writer.write('\"');
      }
  
      if (null != m_doctypeSystem)
      {
        if (null == m_doctypePublic)
          writer.write(" SYSTEM \"");
        else
          writer.write(" \"");
  
        writer.write(m_doctypeSystem);
  
        if (closeDecl)
        {
          writer.write("\">");
          writer.write(m_lineSep, 0, m_lineSepLen);;
        }
        else
          writer.write('\"');
      }
    }
    catch(IOException ioe)
    {
      throw new SAXException(ioe);
    }
  }

  /**
   * Output the doc type declaration.
   *
   * @param name non-null reference to document type name.
   * NEEDSDOC @param value
   *
   * @throws org.xml.sax.SAXException
   */
  void outputEntityDecl(String name, String value)
          throws org.xml.sax.SAXException
  {

    try
    {
      final Writer writer = m_writer;
      writer.write("<!ENTITY ");
      writer.write(name);
      writer.write(" \"");
      writer.write(value);
      writer.write("\">");
      writer.write(m_lineSep, 0, m_lineSepLen);
    }
    catch(IOException ioe)
    {
      throw new SAXException(ioe);
    }
  }

  /**
   * Receive notification of the beginning of a document.
   *
   * @throws org.xml.sax.SAXException Any SAX exception, possibly
   *            wrapping another exception.
   *
   * @throws org.xml.sax.SAXException
   */
  public void startDocument() throws org.xml.sax.SAXException
  {

    if (m_inEntityRef)
      return;

    m_needToOutputDocTypeDecl = true;
    m_startNewLine = false;

    if (m_shouldNotWriteXMLHeader == false)
    {
      String encoding = Encodings.getMimeEncoding(m_encoding);
      String version = (null == m_version) ? "1.0" : m_version;
      String standalone;

      if (m_standaloneWasSpecified)
      {
        standalone = " standalone=\"" + (m_standalone ? "yes" : "no") + "\"";
      }
      else
      {
        standalone = "";
      }

      try
      {
        final Writer writer = m_writer;
        writer.write("<?xml version=\"");
        writer.write(version);
        writer.write("\" encoding=\"");
        writer.write(encoding);
        writer.write('\"');
        writer.write(standalone);
        writer.write("?>");
        writer.write(m_lineSep, 0, m_lineSepLen);
      }
      catch(IOException ioe)
      {
        throw new SAXException(ioe);
      }
    }
  }

  /**
   * Receive notification of the end of a document.
   *
   * @throws org.xml.sax.SAXException Any SAX exception, possibly
   *            wrapping another exception.
   *
   * @throws org.xml.sax.SAXException
   */
  public void endDocument() throws org.xml.sax.SAXException
  {

    if (m_doIndent &&!m_isprevtext)
    {
      outputLineSep();
    }

    flushWriter();
  }

  /**
   * Report the start of DTD declarations, if any.
   *
   * Any declarations are assumed to be in the internal subset
   * unless otherwise indicated.
   *
   * @param name The document type name.
   * @param publicId The declared public identifier for the
   *        external DTD subset, or null if none was declared.
   * @param systemId The declared system identifier for the
   *        external DTD subset, or null if none was declared.
   * @throws org.xml.sax.SAXException The application may raise an
   *            exception.
   * @see #endDTD
   * @see #startEntity
   */
  public void startDTD(String name, String publicId, String systemId)
          throws org.xml.sax.SAXException
  {
    m_doctypeSystem = systemId;
    m_doctypePublic = publicId;

    if ((true == m_needToOutputDocTypeDecl))  // && (null != m_doctypeSystem))
    {
      outputDocTypeDecl(name, false);
    }

    m_needToOutputDocTypeDecl = false;
    m_inDoctype = true;
  }

  /**
   * Report the end of DTD declarations.
   *
   * @throws org.xml.sax.SAXException The application may raise an exception.
   * @see #startDTD
   */
  public void endDTD() throws org.xml.sax.SAXException
  {
    try
    {
      if (!m_inDoctype)
        m_writer.write("]>");
      else
      {
        m_writer.write('>');
      }
  
      m_writer.write(m_lineSep, 0, m_lineSepLen);
    }
    catch(IOException ioe)
    {
      throw new SAXException(ioe);
    }

    // Do nothing for now.
  }

  /**
   * Begin the scope of a prefix-URI Namespace mapping.
   * @see org.xml.sax.ContentHandler#startPrefixMapping
   *
   * @param prefix The Namespace prefix being declared.
   * @param uri The Namespace URI the prefix is mapped to.
   * @throws org.xml.sax.SAXException The client may throw
   *            an exception during processing.
   */
  public void startPrefixMapping(String prefix, String uri)
          throws org.xml.sax.SAXException{}

  /**
   * End the scope of a prefix-URI Namespace mapping.
   * @see org.xml.sax.ContentHandler#endPrefixMapping
   *
   * @param prefix The prefix that was being mapping.
   * @throws org.xml.sax.SAXException The client may throw
   *            an exception during processing.
   */
  public void endPrefixMapping(String prefix)
          throws org.xml.sax.SAXException{}

  /**
   * Tell if two strings are equal, without worry if the first string is null.
   *
   * @param p String reference, which may be null.
   * @param t String reference, which may be null.
   *
   * @return true if strings are equal.
   */
  protected static final boolean subPartMatch(String p, String t)
  {
    return (p == t) || ((null != p) && (p.equals(t)));
  }

  /**
   * Push a boolean state based on if the name of the element
   * is found in the list of qnames.  A state is always pushed,
   * one way or the other.
   *
   * @param namespaceURI Should be a non-null reference to the namespace URL
   *        of the element that owns the state, or empty string.
   * @param localName Should be a non-null reference to the local name
   *        of the element that owns the state.
   * @param qnames Vector of qualified names of elements, or null.
   * @param state The stack where the state should be pushed.
   */
  protected void pushState(String namespaceURI, String localName,
                           Vector qnames, BoolStack state)
  {

    boolean b;

    if (null != qnames)
    {
      b = false;

      if ((null != namespaceURI) && namespaceURI.length() == 0)
        namespaceURI = null;

      int nElems = qnames.size();

      for (int i = 0; i < nElems; i++)
      {
        QName q = (QName) qnames.elementAt(i);

        if (q.getLocalName().equals(localName)
                && subPartMatch(namespaceURI, q.getNamespaceURI()))
        {
          b = true;

          break;
        }
      }
    }
    else
    {
      b = state.peekOrFalse();
    }

    state.push(b);
  }

  /**
   * Receive notification of the beginning 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.
   * @param atts The attributes attached to the element, if any.
   * @throws org.xml.sax.SAXException Any SAX exception, possibly
   *            wrapping another exception.
   * @see org.xml.sax.ContentHandler#startElement
   * @see org.xml.sax.ContentHandler#endElement
   * @see org.xml.sax.AttributeList
   *
   * @throws org.xml.sax.SAXException
   */
  public void startElement(
          String namespaceURI, String localName, String name, Attributes atts)
            throws org.xml.sax.SAXException
  {

    if (DEBUG)
    {
      System.out.println("SerializerToXML - startElement: " + namespaceURI
                         + ", " + localName);

      int n = atts.getLength();

      for (int i = 0; i < n; i++)
      {
        System.out.println("atts[" + i + "]: " + atts.getQName(i) + " = "
                           + atts.getValue(i));
      }

      if (null == namespaceURI)
      {
        (new RuntimeException(localName
                              + " has a null namespace!")).printStackTrace();
      }
    }

    if (m_inEntityRef)
      return;

    if ((true == m_needToOutputDocTypeDecl) && (null != m_doctypeSystem))
    {
      outputDocTypeDecl(name, true);
    }

    m_needToOutputDocTypeDecl = false;

    writeParentTagEnd();
    pushState(namespaceURI, localName, m_cdataSectionNames,
              m_cdataSectionStates);

    // pushState(namespaceURI, localName, m_format.getNonEscapingElements(),
    //          m_disableOutputEscapingStates);
    m_ispreserve = false;

    //  System.out.println(name+": m_doIndent = "+m_doIndent+", m_ispreserve = "+m_ispreserve+", m_isprevtext = "+m_isprevtext);
    if (shouldIndent() && m_startNewLine)
    {
      indent(m_currentIndent);
    }

    m_startNewLine = true;

    try
    {
      m_writer.write('<');
      m_writer.write(name);
    }
    catch(IOException ioe)
    {
      throw new SAXException(ioe);
    }

    int nAttrs = atts.getLength();

    for (int i = 0; i < nAttrs; i++)
    {
      processAttribute(atts.getQName(i), atts.getValue(i));
    }

    // Flag the current element as not yet having any children.
    openElementForChildren();

    m_currentIndent += m_indentAmount;
    m_isprevtext = false;
  }

  /**
   * Check to see if a parent's ">" has been written, and, if
   * it has not, write it.
   *
   * @throws org.xml.sax.SAXException
   */
  protected void writeParentTagEnd() throws org.xml.sax.SAXException
  {

    // See if the parent element has already been flagged as having children.
    if (!m_elemStack.peekOrTrue())
    {
      try
      {
        m_writer.write('>');
      }