resulttreehandler.java

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            if (!rawName.equals("xmlns")) { // don't handle xmlns default namespace.
                ensurePrefixIsDeclared(uri, rawName);
            }    
        } catch (org.xml.sax.SAXException se) {
            throw new TransformerException(se);
        }
      
        if (DEBUG) {
            System.out.println("ResultTreeHandler#addAttribute Adding attr: "
			   + localName + ", " + uri);
        }
        
        if (!isDefinedNSDecl(rawName, value)) {
            m_attributes.addAttribute(uri, localName, rawName, type, value);
        }
    } else {
        m_transformer.getMsgMgr().warn(m_stylesheetRoot,
                                   XSLTErrorResources.WG_ILLEGAL_ATTRIBUTE_POSITION,
                                   new Object[]{ localName });
    }
}

  /**
   * Return whether or not a namespace declaration is defined
   *
   *
   * @param rawName Raw name of namespace element
   * @param value URI of given namespace
   *
   * @return True if the namespace is already defined in list of
   * namespaces
   */
  public boolean isDefinedNSDecl(String rawName, String value)
  {

    if (rawName.equals("xmlns") || rawName.startsWith("xmlns:"))
    {
      int index;
      String prefix = (index = rawName.indexOf(":")) < 0
                      ? "" : rawName.substring(0, index);
      String definedURI = m_nsSupport.getURI(prefix);

      if (null != definedURI)
      {
        if (definedURI.equals(value))
        {
          return true;
        }
        else
          return false;
      }
      else
        return false;
    }
    else
      return false;
  }

  /**
   * Returns whether a namespace is defined
   *
   *
   * @param attr Namespace attribute node
   *
   * @return True if the namespace is already defined in
   * list of namespaces
   */
  public boolean isDefinedNSDecl(int attr)
  {

    DTM dtm = m_transformer.getXPathContext().getDTM(attr);

    if (DTM.NAMESPACE_NODE == dtm.getNodeType(attr))
    {

      // String prefix = dtm.getPrefix(attr);
      String prefix = dtm.getNodeNameX(attr);
      String uri = getURI(prefix);

      if ((null != uri) && uri.equals(dtm.getStringValue(attr)))
        return true;
    }

    return false;
  }

  /**
   * Returns whether a namespace is defined
   *
   *
   * @param attr Namespace attribute node
   * @param dtm The DTM that owns attr.
   *
   * @return True if the namespace is already defined in
   * list of namespaces
   */
  public boolean isDefinedNSDecl(int attr, DTM dtm)
  {

    if (DTM.NAMESPACE_NODE == dtm.getNodeType(attr))
    {

      // String prefix = dtm.getPrefix(attr);
      String prefix = dtm.getNodeNameX(attr);
      String uri = getURI(prefix);

      if ((null != uri) && uri.equals(dtm.getStringValue(attr)))
        return true;
    }

    return false;
  }

  /**
   * Copy an DOM attribute to the created output element, executing
   * attribute templates as need be, and processing the xsl:use
   * attribute.
   *
   * @param attr Attribute node to add to result tree
   *
   * @throws TransformerException
   */
  public void addAttribute(int attr) throws TransformerException
  {

    DTM dtm = m_transformer.getXPathContext().getDTM(attr);

    if (isDefinedNSDecl(attr, dtm))
      return;

    String ns = dtm.getNamespaceURI(attr);

    if (ns == null)
      ns = "";

    // %OPT% ...can I just store the node handle?    
    addAttribute(ns, dtm.getLocalName(attr), dtm.getNodeName(attr), "CDATA",
                 dtm.getNodeValue(attr));
  }  // end copyAttributeToTarget method

  /**
   * Copy DOM attributes to the result element.
   *
   * @param src Source node with the attributes
   *
   * @throws TransformerException
   */
  public void addAttributes(int src) throws TransformerException
  {

    DTM dtm = m_transformer.getXPathContext().getDTM(src);

    for (int node = dtm.getFirstAttribute(src); DTM.NULL != node;
            node = dtm.getNextAttribute(node))
    {
      addAttribute(node);
    }
  }

  /**
   * Tell if an element is pending, to be output to the result tree.
   *
   * @return True if an element is pending
   */
  public final boolean isElementPending()
  {
    
    return m_elemIsPending;
  }

  /**
   * Retrieves the stylesheet element that produced
   * the SAX event.
   *
   * <p>Please note that the ElemTemplateElement returned may
   * be in a default template, and thus may not be
   * defined in the stylesheet.</p>
   *
   * @return the stylesheet element that produced the SAX event.
   */
  public ElemTemplateElement getCurrentElement()
  {

    if (m_elemIsPending)
      return m_snapshot.m_currentElement;
    else
      return m_transformer.getCurrentElement();
  }

  /**
   * This method retrieves the current context node
   * in the source tree.
   *
   * @return the current context node in the source tree.
   */
  public org.w3c.dom.Node getCurrentNode()
  {
    
    if (m_snapshot.m_currentNode != null)
    {
      return m_snapshot.m_currentNode;
    }
    else
    {
      DTM dtm = m_transformer.getXPathContext().getDTM(m_transformer.getCurrentNode());
      return dtm.getNode(m_transformer.getCurrentNode());
    }
  }

  /**
   * This method retrieves the xsl:template
   * that is in effect, which may be a matched template
   * or a named template.
   *
   * <p>Please note that the ElemTemplate returned may
   * be a default template, and thus may not have a template
   * defined in the stylesheet.</p>
   *
   * @return the xsl:template that is in effect
   */
  public ElemTemplate getCurrentTemplate()
  {

    if (m_elemIsPending)
      return m_snapshot.m_currentTemplate;
    else
      return m_transformer.getCurrentTemplate();
  }

  /**
   * This method retrieves the xsl:template
   * that was matched.  Note that this may not be
   * the same thing as the current template (which
   * may be from getCurrentElement()), since a named
   * template may be in effect.
   *
   * <p>Please note that the ElemTemplate returned may
   * be a default template, and thus may not have a template
   * defined in the stylesheet.</p>
   *
   * @return the xsl:template that was matched.
   */
  public ElemTemplate getMatchedTemplate()
  {

    if (m_elemIsPending)
      return m_snapshot.m_matchedTemplate;
    else
      return m_transformer.getMatchedTemplate();
  }

  /**
   * Retrieves the node in the source tree that matched
   * the template obtained via getMatchedTemplate().
   *
   * @return the node in the source tree that matched
   * the template obtained via getMatchedTemplate().
   */
  public org.w3c.dom.Node getMatchedNode()
  {

    if (m_elemIsPending)
    {
      DTM dtm = m_transformer.getXPathContext().getDTM(m_snapshot.m_matchedNode);
      return dtm.getNode(m_snapshot.m_matchedNode);
    }
    else
    {
      DTM dtm = m_transformer.getXPathContext().getDTM(m_transformer.getMatchedNode());
      return dtm.getNode(m_transformer.getMatchedNode());
    }
  }

  /**
   * Get the current context node list.
   *
   * @return the current context node list.
   */
  public org.w3c.dom.traversal.NodeIterator getContextNodeList()
  {

    if (m_elemIsPending)
    {
      return new org.apache.xml.dtm.ref.DTMNodeIterator(m_snapshot.m_contextNodeList);
    }
    else
      return new org.apache.xml.dtm.ref.DTMNodeIterator(m_transformer.getContextNodeList());
  }

  /**
   * Get the TrAX Transformer object in effect.
   *
   * @return the TrAX Transformer object in effect.
   */
  public Transformer getTransformer()
  {
    return m_transformer;
  }
  
  
  // Implement ErrorHandler
  
  /**
    * Receive notification of a warning.
    *
    * <p>SAX parsers will use this method to report conditions that
    * are not errors or fatal errors as defined by the XML 1.0
    * recommendation.  The default behaviour is to take no action.</p>
    *
    * <p>The SAX parser must continue to provide normal parsing events
    * after invoking this method: it should still be possible for the
    * application to process the document through to the end.</p>
    *
    * <p>Filters may use this method to report other, non-XML warnings
    * as well.</p>
    *
    * @param exception The warning information encapsulated in a
    *                  SAX parse exception.
    * @exception org.xml.sax.SAXException Any SAX exception, possibly
    *            wrapping another exception.
    * @see org.xml.sax.SAXParseException 
    */
  public void warning (SAXParseException exception)
    throws SAXException
  {
    if (m_contentHandler instanceof ErrorHandler)
      ((ErrorHandler)m_contentHandler).warning(exception);
  }
    
    
   /**
    * Receive notification of a recoverable error.
    *
    * <p>This corresponds to the definition of "error" in section 1.2
    * of the W3C XML 1.0 Recommendation.  For example, a validating
    * parser would use this callback to report the violation of a
    * validity constraint.  The default behaviour is to take no
    * action.</p>
    *
    * <p>The SAX parser must continue to provide normal parsing events
    * after invoking this method: it should still be possible for the
    * application to process the document through to the end.  If the
    * application cannot do so, then the parser should report a fatal
    * error even if the XML 1.0 recommendation does not require it to
    * do so.</p>
    *
    * <p>Filters may use this method to report other, non-XML errors
    * as well.</p>
    *
    * @param exception The error information encapsulated in a
    *                  SAX parse exception.
    * @exception org.xml.sax.SAXException Any SAX exception, possibly
    *            wrapping another exception.
    * @see org.xml.sax.SAXParseException 
    */
  public void error (SAXParseException exception)
    throws SAXException
  {
    if (m_contentHandler instanceof ErrorHandler)
      ((ErrorHandler)m_contentHandler).error(exception);
  }
    
    
   /**
    * Receive notification of a non-recoverable error.
    *
    * <p>This corresponds to the definition of "fatal error" in
    * section 1.2 of the W3C XML 1.0 Recommendation.  For example, a
    * parser would use this callback to report the violation of a
    * well-formedness constraint.</p>
    *
    * <p>The application must assume that the document is unusable
    * after the parser has invoked this method, and should continue
    * (if at all) only for the sake of collecting addition error
    * messages: in fact, SAX parsers are free to stop reporting any
    * other events once this method has been invoked.</p>
    *
    * @param exception The error information encapsulated in a
    *                  SAX parse exception.  
    * @exception org.xml.sax.SAXException Any SAX exception, possibly
    *            wrapping another exception.
    * @see org.xml.sax.SAXParseException
    */
  public void fatalError (SAXParseException exception)
    throws SAXException
  {      
    m_elemIsPending = false;
    m_docEnded = true;
    m_docPending = false;
    
    if (m_contentHandler instanceof ErrorHandler)
      ((ErrorHandler)m_contentHandler).fatalError(exception);
  }
  
  boolean m_isTransformClient = false;

  /**
   * Use the SAX2 helper class to track result namespaces.
   */
  NamespaceSupport m_nsSupport = new NamespaceSupport2();

  /**
   * The transformer object.
   */
  private TransformerImpl m_transformer;

  /**
   * The content handler.  May be null, in which
   * case, we'll defer to the content handler in the
   * transformer.
   */
  private ContentHandler m_contentHandler;

  /** The LexicalHandler */
  private LexicalHandler m_lexicalHandler;

  /**
   * The root of a linked set of stylesheets.
   */
  private StylesheetRoot m_stylesheetRoot = null;

  /**
   * This is used whenever a unique namespace is needed.
   */
  private int m_uniqueNSValue = 0;

  /** Prefix used to create unique prefix names */
  private static final String S_NAMESPACEPREFIX = "ns";

  /**
   * This class clones nodes to the result tree.
   */
  public ClonerToResultTree m_cloner;

  /**
   * Trace manager for debug support.
   */
  private TraceManager m_tracer;
  
  private QueuedStateSnapshot m_snapshot = new QueuedStateSnapshot();

  // These are passed to flushPending, to help it decide if it 
  // should really flush.
  
  class QueuedStateSnapshot
  {
    /**
     * The stylesheet element that produced the SAX event.
     */
    ElemTemplateElement m_currentElement;
    
    /**
     * The current context node in the source tree.
     */
    org.w3c.dom.Node m_currentNode;
    
    /**
     * The xsl:template that is in effect, which may be a matched template
     * or a named template.
     */
    ElemTemplate m_currentTemplate;
    
    /**
     * The xsl:template that was matched.
     */
    ElemTemplate m_matchedTemplate;
    
    /**
     * The node in the source tree that matched
     * the template obtained via getMatchedTemplate().
     */
    int m_matchedNode;
    
    /**
     * The current context node list.
     */
    DTMIterator m_contextNodeList;
  }
}