dtmdocumentimpl.java

来自「java jdk 1.4的源码」· Java 代码 · 共 1,655 行 · 第 1/5 页

          * Set a reference pointer to the content-text repository
          *
          * @param bufferRef FastStringBuffer reference to an instance of
          * buffer
          */
         void setContentBuffer(FastStringBuffer buffer) {
                 m_char = buffer;
         }

         /**
          * Get a reference pointer to the content-text repository
          *
          * @return FastStringBuffer reference to an instance of buffer
          */
         FastStringBuffer getContentBuffer() {
                 return m_char;
         }

  /** getContentHandler returns "our SAX builder" -- the thing that
   * someone else should send SAX events to in order to extend this
   * DTM model.
   *
   * @return null if this model doesn't respond to SAX events,
   * "this" if the DTM object has a built-in SAX ContentHandler,
   * the IncrementalSAXSource if we're bound to one and should receive
   * the SAX stream via it for incremental build purposes...
   * */
  public org.xml.sax.ContentHandler getContentHandler()
  {
    if (m_incrSAXSource instanceof IncrementalSAXSource_Filter)
      return (ContentHandler) m_incrSAXSource;
    else
      return this;
  }

  /**
   * Return this DTM's lexical handler.
   *
   * %REVIEW% Should this return null if constrution already done/begun?
   *
   * @return null if this model doesn't respond to lexical SAX events,
   * "this" if the DTM object has a built-in SAX ContentHandler,
   * the IncrementalSAXSource if we're bound to one and should receive
   * the SAX stream via it for incremental build purposes...
   */
  public LexicalHandler getLexicalHandler()
  {

    if (m_incrSAXSource instanceof IncrementalSAXSource_Filter)
      return (LexicalHandler) m_incrSAXSource;
    else
      return this;
  }

  /**
   * Return this DTM's EntityResolver.
   *
   * @return null if this model doesn't respond to SAX entity ref events.
   */
  public org.xml.sax.EntityResolver getEntityResolver()
  {

    return null;
  }

  /**
   * Return this DTM's DTDHandler.
   *
   * @return null if this model doesn't respond to SAX dtd events.
   */
  public org.xml.sax.DTDHandler getDTDHandler()
  {

    return null;
  }

  /**
   * Return this DTM's ErrorHandler.
   *
   * @return null if this model doesn't respond to SAX error events.
   */
  public org.xml.sax.ErrorHandler getErrorHandler()
  {

    return null;
  }

  /**
   * Return this DTM's DeclHandler.
   *
   * @return null if this model doesn't respond to SAX Decl events.
   */
  public org.xml.sax.ext.DeclHandler getDeclHandler()
  {

    return null;
  }

  /** @return true iff we're building this model incrementally (eg
   * we're partnered with a IncrementalSAXSource) and thus require that the
   * transformation and the parse run simultaneously. Guidance to the
   * DTMManager.
   * */
  public boolean needsTwoThreads()
  {
    return null!=m_incrSAXSource;
  }

  //================================================================
  // ========= SAX2 ContentHandler methods =========
  // Accept SAX events, use them to build/extend the DTM tree.
  // Replaces the deprecated DocumentHandler interface.

  public void characters(char[] ch, int start, int length)
       throws org.xml.sax.SAXException
  {
    // Actually creating the text node is handled by
    // processAccumulatedText(); here we just accumulate the
    // characters into the buffer.
    m_char.append(ch,start,length);
  }

  // Flush string accumulation into a text node
  private void processAccumulatedText()
  {
    int len=m_char.length();
    if(len!=m_char_current_start)
      {
        // The FastStringBuffer has been previously agreed upon
        appendTextChild(m_char_current_start,len-m_char_current_start);
        m_char_current_start=len;
      }
  }
  public void endDocument()
       throws org.xml.sax.SAXException
  {
    // May need to tell the low-level builder code to pop up a level.
    // There _should't_ be any significant pending text at this point.
    appendEndDocument();
  }
  public void endElement(java.lang.String namespaceURI, java.lang.String localName,
      java.lang.String qName)
       throws org.xml.sax.SAXException
  {
    processAccumulatedText();
    // No args but we do need to tell the low-level builder code to
    // pop up a level.
    appendEndElement();
  }
  public void endPrefixMapping(java.lang.String prefix)
       throws org.xml.sax.SAXException
  {
    // No-op
  }
  public void ignorableWhitespace(char[] ch, int start, int length)
       throws org.xml.sax.SAXException
  {
    // %TBD% I believe ignorable text isn't part of the DTM model...?
  }
  public void processingInstruction(java.lang.String target, java.lang.String data)
       throws org.xml.sax.SAXException
  {
    processAccumulatedText();
    // %TBD% Which pools do target and data go into?
  }
  public void setDocumentLocator(Locator locator)
  {
    // No-op for DTM
  }
  public void skippedEntity(java.lang.String name)
       throws org.xml.sax.SAXException
  {
    processAccumulatedText();
    //%TBD%
  }
  public void startDocument()
       throws org.xml.sax.SAXException
  {
    appendStartDocument();
  }
  public void startElement(java.lang.String namespaceURI, java.lang.String localName,
      java.lang.String qName, Attributes atts)
       throws org.xml.sax.SAXException
  {
    processAccumulatedText();

    // %TBD% Split prefix off qname
    String prefix=null;
    int colon=qName.indexOf(':');
    if(colon>0)
      prefix=qName.substring(0,colon);

    // %TBD% Where do we pool expandedName, or is it just the union, or...
    /**/System.out.println("Prefix="+prefix+" index="+m_prefixNames.stringToIndex(prefix));
    appendStartElement(m_nsNames.stringToIndex(namespaceURI),
                     m_localNames.stringToIndex(localName),
                     m_prefixNames.stringToIndex(prefix)); /////// %TBD%

    // %TBD% I'm assuming that DTM will require resequencing of
    // NS decls before other attrs, hence two passes are taken.
    // %TBD% Is there an easier way to test for NSDecl?
    int nAtts=(atts==null) ? 0 : atts.getLength();
    // %TBD% Countdown is more efficient if nobody cares about sequence.
    for(int i=nAtts-1;i>=0;--i)
      {
        qName=atts.getQName(i);
        if(qName.startsWith("xmlns:") || "xmlns".equals(qName))
          {
            prefix=null;
            colon=qName.indexOf(':');
            if(colon>0)
              {
                prefix=qName.substring(0,colon);
              }
            else
              {
                // %REVEIW% Null or ""?
                prefix=null; // Default prefix
              }


            appendNSDeclaration(
                                    m_prefixNames.stringToIndex(prefix),
                                    m_nsNames.stringToIndex(atts.getValue(i)),
                                    atts.getType(i).equalsIgnoreCase("ID"));
          }
      }

    for(int i=nAtts-1;i>=0;--i)
      {
        qName=atts.getQName(i);
        if(!(qName.startsWith("xmlns:") || "xmlns".equals(qName)))
          {
            // %TBD% I hate having to extract the prefix into a new
            // string when we may never use it. Consider pooling whole
            // qNames, which are already strings?
            prefix=null;
            colon=qName.indexOf(':');
            if(colon>0)
              {
                prefix=qName.substring(0,colon);
                localName=qName.substring(colon+1);
              }
            else
              {
                prefix=""; // Default prefix
                localName=qName;
              }


            m_char.append(atts.getValue(i)); // Single-string value
            int contentEnd=m_char.length();

            if(!("xmlns".equals(prefix) || "xmlns".equals(qName)))
              appendAttribute(m_nsNames.stringToIndex(atts.getURI(i)),
                                  m_localNames.stringToIndex(localName),
                                  m_prefixNames.stringToIndex(prefix),
                                  atts.getType(i).equalsIgnoreCase("ID"),
                                  m_char_current_start, contentEnd-m_char_current_start);
            m_char_current_start=contentEnd;
          }
      }
  }
  public void startPrefixMapping(java.lang.String prefix, java.lang.String uri)
       throws org.xml.sax.SAXException
  {
    // No-op in DTM, handled during element/attr processing?
  }

  //
  // LexicalHandler support. Not all SAX2 parsers support these events
  // but we may want to pass them through when they exist...
  //
  public void comment(char[] ch, int start, int length)
       throws org.xml.sax.SAXException
  {
    processAccumulatedText();

    m_char.append(ch,start,length); // Single-string value
    appendComment(m_char_current_start,length);
    m_char_current_start+=length;
  }
  public void endCDATA()
       throws org.xml.sax.SAXException
  {
    // No-op in DTM
  }
  public void endDTD()
       throws org.xml.sax.SAXException
  {
    // No-op in DTM
  }
  public void endEntity(java.lang.String name)
       throws org.xml.sax.SAXException
  {
    // No-op in DTM
  }
  public void startCDATA()
       throws org.xml.sax.SAXException
  {
    // No-op in DTM
  }
  public void startDTD(java.lang.String name, java.lang.String publicId,
      java.lang.String systemId)
       throws org.xml.sax.SAXException
  {
    // No-op in DTM
  }
  public void startEntity(java.lang.String name)
       throws org.xml.sax.SAXException
  {
    // No-op in DTM
  }


  //================================================================
  // ========= Document Handler Functions =========
  // %REVIEW% jjk -- DocumentHandler is  SAX Level 1, and deprecated....
  // and this wasn't a fully compliant or declared implementation of that API
  // in any case. Phase out in favor of SAX2 ContentHandler/LexicalHandler

        /**
         * Reset a dtm document to its initial (empty) state.
         *
         * The DTMManager will invoke this method when the dtm is created.
         *
         * @param docHandle int the handle for the DTM document.
         */
        final void initDocument(int documentNumber)
        {
                // save masked DTM document handle