dtmdefaultbase.java

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   * @param identity The node identity (index).
   * @return identity+1, or DTM.NULL.
   */
  protected abstract int getNextNodeIdentity(int identity);

  /**
   * This method should try and build one or more nodes in the table.
   *
   * @return The true if a next node is found or false if
   *         there are no more nodes.
   */
  protected abstract boolean nextNode();

  /**
   * Get the number of nodes that have been added.
   *
   * @return the number of nodes that have been mapped.
   */
  protected abstract int getNumberOfNodes();

  /** Stateless axis traversers, lazely built. */
  protected DTMAxisTraverser[] m_traversers;

//    /**
//     * Ensure that the size of the information arrays can hold another entry
//     * at the given index.
//     *
//     * @param index On exit from this function, the information arrays sizes must be
//     * at least index+1.
//     */
//    protected void ensureSize(int index)
//    {
//        // We've cut over to Suballocated*Vector, which are self-sizing.
//    }

  /**
   * Get the simple type ID for the given node identity.
   *
   * @param identity The node identity.
   *
   * @return The simple type ID, or DTM.NULL.
   */
  protected short _type(int identity)
  {

    int info = _exptype(identity);

    if (NULL != info)
      return m_expandedNameTable.getType(info);
    else
      return NULL;
  }

  /**
   * Get the expanded type ID for the given node identity.
   *
   * @param identity The node identity.
   *
   * @return The expanded type ID, or DTM.NULL.
   */
  protected int _exptype(int identity)
  {
  	if (identity == DTM.NULL)
  	return NULL;
    // Reorganized test and loop into single flow
    // Tiny performance improvement, saves a few bytes of code, clearer.
    // %OPT% Other internal getters could be treated simliarly
    while (identity>=m_size)
    {
      if (!nextNode() && identity >= m_size)
        return NULL;
    }
    return m_exptype.elementAt(identity);

  }

  /**
   * Get the level in the tree for the given node identity.
   *
   * @param identity The node identity.
   *
   * @return The tree level, or DTM.NULL.
   */
  protected int _level(int identity)
  {
    while (identity>=m_size)
    {
      boolean isMore = nextNode();
      if (!isMore && identity >= m_size)
        return NULL;
    }

    int i=0;
    while(NULL != (identity=_parent(identity)))
      ++i;
    return i;
  }

  /**
   * Get the first child for the given node identity.
   *
   * @param identity The node identity.
   *
   * @return The first child identity, or DTM.NULL.
   */
  protected int _firstch(int identity)
  {

    // Boiler-plate code for each of the _xxx functions, except for the array.
    int info = (identity >= m_size) ? NOTPROCESSED : m_firstch.elementAt(identity);

    // Check to see if the information requested has been processed, and,
    // if not, advance the iterator until we the information has been
    // processed.
    while (info == NOTPROCESSED)
    {
      boolean isMore = nextNode();

      if (identity >= m_size &&!isMore)
        return NULL;
      else
      {
        info = m_firstch.elementAt(identity);
        if(info == NOTPROCESSED && !isMore)
          return NULL;
      }
    }

    return info;
  }

  /**
   * Get the next sibling for the given node identity.
   *
   * @param identity The node identity.
   *
   * @return The next sibling identity, or DTM.NULL.
   */
  protected int _nextsib(int identity)
  {
    // Boiler-plate code for each of the _xxx functions, except for the array.
    int info = (identity >= m_size) ? NOTPROCESSED : m_nextsib.elementAt(identity);

    // Check to see if the information requested has been processed, and,
    // if not, advance the iterator until we the information has been
    // processed.
    while (info == NOTPROCESSED)
    {
      boolean isMore = nextNode();

      if (identity >= m_size &&!isMore)
        return NULL;
      else
      {
        info = m_nextsib.elementAt(identity);
        if(info == NOTPROCESSED && !isMore)
          return NULL;
      }
    }

    return info;
  }

  /**
   * Get the previous sibling for the given node identity.
   *
   * @param identity The node identity.
   *
   * @return The previous sibling identity, or DTM.NULL.
   */
  protected int _prevsib(int identity)
  {

    if (identity < m_size)
      return m_prevsib.elementAt(identity);

    // Check to see if the information requested has been processed, and,
    // if not, advance the iterator until we the information has been
    // processed.
    while (true)
    {
      boolean isMore = nextNode();

      if (identity >= m_size && !isMore)
        return NULL;
      else if (identity < m_size)
        return m_prevsib.elementAt(identity);
    }
  }

  /**
   * Get the parent for the given node identity.
   *
   * @param identity The node identity.
   *
   * @return The parent identity, or DTM.NULL.
   */
  protected int _parent(int identity)
  {

    if (identity < m_size)
      return m_parent.elementAt(identity);

    // Check to see if the information requested has been processed, and,
    // if not, advance the iterator until we the information has been
    // processed.
    while (true)
    {
      boolean isMore = nextNode();

      if (identity >= m_size && !isMore)
        return NULL;
      else if (identity < m_size)
        return m_parent.elementAt(identity);
    }
  }

  /**
   * Diagnostics function to dump the DTM.
   */
  public void dumpDTM(OutputStream os)
  {
    try
    {
      if(os==null)
      {
	      File f = new File("DTMDump"+((Object)this).hashCode()+".txt");
 	      System.err.println("Dumping... "+f.getAbsolutePath());
 	      os=new FileOutputStream(f);
      }
      PrintStream ps = new PrintStream(os);

      while (nextNode()){}

      int nRecords = m_size;

      ps.println("Total nodes: " + nRecords);

      for (int index = 0; index < nRecords; ++index)
      {
      	int i=makeNodeHandle(index);
        ps.println("=========== index=" + index + " handle=" + i + " ===========");
        ps.println("NodeName: " + getNodeName(i));
        ps.println("NodeNameX: " + getNodeNameX(i));
        ps.println("LocalName: " + getLocalName(i));
        ps.println("NamespaceURI: " + getNamespaceURI(i));
        ps.println("Prefix: " + getPrefix(i));

        int exTypeID = _exptype(index);

        ps.println("Expanded Type ID: "
                           + Integer.toHexString(exTypeID));

        int type = _type(index);
        String typestring;

        switch (type)
        {
        case DTM.ATTRIBUTE_NODE :
          typestring = "ATTRIBUTE_NODE";
          break;
        case DTM.CDATA_SECTION_NODE :
          typestring = "CDATA_SECTION_NODE";
          break;
        case DTM.COMMENT_NODE :
          typestring = "COMMENT_NODE";
          break;
        case DTM.DOCUMENT_FRAGMENT_NODE :
          typestring = "DOCUMENT_FRAGMENT_NODE";
          break;
        case DTM.DOCUMENT_NODE :
          typestring = "DOCUMENT_NODE";
          break;
        case DTM.DOCUMENT_TYPE_NODE :
          typestring = "DOCUMENT_NODE";
          break;
        case DTM.ELEMENT_NODE :
          typestring = "ELEMENT_NODE";
          break;
        case DTM.ENTITY_NODE :
          typestring = "ENTITY_NODE";
          break;
        case DTM.ENTITY_REFERENCE_NODE :
          typestring = "ENTITY_REFERENCE_NODE";
          break;
        case DTM.NAMESPACE_NODE :
          typestring = "NAMESPACE_NODE";
          break;
        case DTM.NOTATION_NODE :
          typestring = "NOTATION_NODE";
          break;
        case DTM.NULL :
          typestring = "NULL";
          break;
        case DTM.PROCESSING_INSTRUCTION_NODE :
          typestring = "PROCESSING_INSTRUCTION_NODE";
          break;
        case DTM.TEXT_NODE :
          typestring = "TEXT_NODE";
          break;
        default :
          typestring = "Unknown!";
          break;
        }

        ps.println("Type: " + typestring);

        int firstChild = _firstch(index);

        if (DTM.NULL == firstChild)
          ps.println("First child: DTM.NULL");
        else if (NOTPROCESSED == firstChild)
          ps.println("First child: NOTPROCESSED");
        else
          ps.println("First child: " + firstChild);

        if (m_prevsib != null)
        {
          int prevSibling = _prevsib(index);

          if (DTM.NULL == prevSibling)
            ps.println("Prev sibling: DTM.NULL");
          else if (NOTPROCESSED == prevSibling)
            ps.println("Prev sibling: NOTPROCESSED");
          else
            ps.println("Prev sibling: " + prevSibling);
        }

        int nextSibling = _nextsib(index);

        if (DTM.NULL == nextSibling)
          ps.println("Next sibling: DTM.NULL");
        else if (NOTPROCESSED == nextSibling)
          ps.println("Next sibling: NOTPROCESSED");
        else
          ps.println("Next sibling: " + nextSibling);

        int parent = _parent(index);

        if (DTM.NULL == parent)
          ps.println("Parent: DTM.NULL");
        else if (NOTPROCESSED == parent)
          ps.println("Parent: NOTPROCESSED");
        else
          ps.println("Parent: " + parent);

        int level = _level(index);

        ps.println("Level: " + level);
        ps.println("Node Value: " + getNodeValue(i));
        ps.println("String Value: " + getStringValue(i));
      }
    }
    catch(IOException ioe)
    {
      ioe.printStackTrace(System.err);
        throw new RuntimeException(ioe.getMessage());
    }
  }
  
  /**
   * Diagnostics function to dump a single node.
   * 
   * %REVIEW% KNOWN GLITCH: If you pass it a node index rather than a 
   * node handle, it works just fine... but the displayed identity 
   * number before the colon is different, which complicates comparing
   * it with nodes printed the other way. We could always OR the DTM ID
   * into the value, to suppress that distinction...
   * 
   * %REVIEW% This might want to be moved up to DTMDefaultBase, or possibly
   * DTM itself, since it's a useful diagnostic and uses only DTM's public
   * APIs.
   */
  public String dumpNode(int nodeHandle)
  {	  
	  if(nodeHandle==DTM.NULL)
		  return "[null]";
		  
        String typestring;
        switch (getNodeType(nodeHandle))
        {
        case DTM.ATTRIBUTE_NODE :
          typestring = "ATTR";
          break;
        case DTM.CDATA_SECTION_NODE :
          typestring = "CDATA";
          break;
        case DTM.COMMENT_NODE :
          typestring = "COMMENT";
          break;
        case DTM.DOCUMENT_FRAGMENT_NODE :
          typestring = "DOC_FRAG";
          break;
        case DTM.DOCUMENT_NODE :
          typestring = "DOC";
          break;
        case DTM.DOCUMENT_TYPE_NODE :
          typestring = "DOC_TYPE";
          break;
        case DTM.ELEMENT_NODE :
          typestring = "ELEMENT";
          break;
        case DTM.ENTITY_NODE :
          typestring = "ENTITY";
          break;
        case DTM.ENTITY_REFERENCE_NODE :
          typestring = "ENT_REF";
          break;
        case DTM.NAMESPACE_NODE :
          typestring = "NAMESPACE";
          break;
        case DTM.NOTATION_NODE :
          typestring = "NOTATION";
          break;