elemnumber.java

来自「java jdk 1.4的源码」· Java 代码 · 共 1,968 行 · 第 1/5 页

      case DTM.ATTRIBUTE_NODE :

        // countMatchPattern = m_stylesheet.createMatchPattern("@"+contextNode.getNodeName(), this);
        countMatchPattern = new XPath("@" + dtm.getNodeName(contextNode), this,
                                      this, XPath.MATCH, support.getErrorListener());
        break;
      case DTM.CDATA_SECTION_NODE :
      case DTM.TEXT_NODE :

        // countMatchPattern = m_stylesheet.createMatchPattern("text()", this);
        countMatchPattern = new XPath("text()", this, this, XPath.MATCH, support.getErrorListener());
        break;
      case DTM.COMMENT_NODE :

        // countMatchPattern = m_stylesheet.createMatchPattern("comment()", this);
        countMatchPattern = new XPath("comment()", this, this, XPath.MATCH, support.getErrorListener());
        break;
      case DTM.DOCUMENT_NODE :

        // countMatchPattern = m_stylesheet.createMatchPattern("/", this);
        countMatchPattern = new XPath("/", this, this, XPath.MATCH, support.getErrorListener());
        break;
      case DTM.PROCESSING_INSTRUCTION_NODE :

        // countMatchPattern = m_stylesheet.createMatchPattern("pi("+contextNode.getNodeName()+")", this);
        countMatchPattern = new XPath("pi(" + dtm.getNodeName(contextNode)
                                      + ")", this, this, XPath.MATCH, support.getErrorListener());
        break;
      default :
        countMatchPattern = null;
      }
    }

    return countMatchPattern;
  }

  /**
   * Given an XML source node, get the count according to the
   * parameters set up by the xsl:number attributes.
   * @param transformer non-null reference to the the current transform-time state.
   * @param sourceNode The source node being counted.
   *
   * @return The count of nodes
   *
   * @throws TransformerException
   */
  String getCountString(TransformerImpl transformer, int sourceNode)
          throws TransformerException
  {

    long[] list = null;
    XPathContext xctxt = transformer.getXPathContext();
    CountersTable ctable = transformer.getCountersTable();

    if (null != m_valueExpr)
    {
      XObject countObj = m_valueExpr.execute(xctxt, sourceNode, this);
      long count = (long)java.lang.Math.floor(countObj.num()+ 0.5);

      list = new long[1];
      list[0] = count;
    }
    else
    {
      if (Constants.NUMBERLEVEL_ANY == m_level)
      {
        list = new long[1];
        list[0] = ctable.countNode(xctxt, this, sourceNode);
      }
      else
      {
        NodeVector ancestors =
          getMatchingAncestors(xctxt, sourceNode,
                               Constants.NUMBERLEVEL_SINGLE == m_level);
        int lastIndex = ancestors.size() - 1;

        if (lastIndex >= 0)
        {
          list = new long[lastIndex + 1];

          for (int i = lastIndex; i >= 0; i--)
          {
            int target = ancestors.elementAt(i);

            list[lastIndex - i] = ctable.countNode(xctxt, this, target);
          }
        }
      }
    }

    return (null != list)
           ? formatNumberList(transformer, list, sourceNode) : "";
  }

  /**
   * Get the previous node to be counted.
   *
   * @param xctxt The XPath runtime state for this.
   * @param pos The current node
   *
   * @return the previous node to be counted.
   *
   * @throws TransformerException
   */
  public int getPreviousNode(XPathContext xctxt, int pos)
          throws TransformerException
  {

    XPath countMatchPattern = getCountMatchPattern(xctxt, pos);
    DTM dtm = xctxt.getDTM(pos);

    if (Constants.NUMBERLEVEL_ANY == m_level)
    {
      XPath fromMatchPattern = m_fromMatchPattern;

      // Do a backwards document-order walk 'till a node is found that matches 
      // the 'from' pattern, or a node is found that matches the 'count' pattern, 
      // or the top of the tree is found.
      while (DTM.NULL != pos)
      {

        // Get the previous sibling, if there is no previous sibling, 
        // then count the parent, but if there is a previous sibling, 
        // dive down to the lowest right-hand (last) child of that sibling.
        int next = dtm.getPreviousSibling(pos);

        if (DTM.NULL == next)
        {
          next = dtm.getParent(pos);

          if ((DTM.NULL != next) && ((((null != fromMatchPattern) && (fromMatchPattern.getMatchScore(
                  xctxt, next) != XPath.MATCH_SCORE_NONE))) 
              || (dtm.getNodeType(next) == DTM.DOCUMENT_NODE)))
          {
            pos = DTM.NULL;  // return null from function.

            break;  // from while loop
          }
        }
        else
        {

          // dive down to the lowest right child.
          int child = next;

          while (DTM.NULL != child)
          {
            child = dtm.getLastChild(next);

            if (DTM.NULL != child)
              next = child;
          }
        }

        pos = next;

        if ((DTM.NULL != pos)
                && ((null == countMatchPattern)
                    || (countMatchPattern.getMatchScore(xctxt, pos)
                        != XPath.MATCH_SCORE_NONE)))
        {
          break;
        }
      }
    }
    else  // NUMBERLEVEL_MULTI or NUMBERLEVEL_SINGLE
    {
      while (DTM.NULL != pos)
      {
        pos = dtm.getPreviousSibling(pos);

        if ((DTM.NULL != pos)
                && ((null == countMatchPattern)
                    || (countMatchPattern.getMatchScore(xctxt, pos)
                        != XPath.MATCH_SCORE_NONE)))
        {
          break;
        }
      }
    }

    return pos;
  }

  /**
   * Get the target node that will be counted..
   *
   * @param xctxt The XPath runtime state for this.
   * @param sourceNode non-null reference to the <a href="http://www.w3.org/TR/xslt#dt-current-node">current source node</a>.
   *
   * @return the target node that will be counted
   *
   * @throws TransformerException
   */
  public int getTargetNode(XPathContext xctxt, int sourceNode)
          throws TransformerException
  {

    int target = DTM.NULL;
    XPath countMatchPattern = getCountMatchPattern(xctxt, sourceNode);

    if (Constants.NUMBERLEVEL_ANY == m_level)
    {
      target = findPrecedingOrAncestorOrSelf(xctxt, m_fromMatchPattern,
                                             countMatchPattern, sourceNode,
                                             this);
    }
    else
    {
      target = findAncestor(xctxt, m_fromMatchPattern, countMatchPattern,
                            sourceNode, this);
    }

    return target;
  }

  /**
   * Get the ancestors, up to the root, that match the
   * pattern.
   * 
   * @param patterns if non-null, count only nodes
   * that match this pattern, if null count all ancestors.
   * @param xctxt The XPath runtime state for this.
   * @param node Count this node and it's ancestors.
   * @param stopAtFirstFound Flag indicating to stop after the
   * first node is found (difference between level = single
   * or multiple)
   * @return The number of ancestors that match the pattern.
   *
   * @throws javax.xml.transform.TransformerException
   */
  NodeVector getMatchingAncestors(
          XPathContext xctxt, int node, boolean stopAtFirstFound)
            throws javax.xml.transform.TransformerException
  {

    NodeSetDTM ancestors = new NodeSetDTM(xctxt.getDTMManager());
    XPath countMatchPattern = getCountMatchPattern(xctxt, node);
    DTM dtm = xctxt.getDTM(node);

    while (DTM.NULL != node)
    {
      if ((null != m_fromMatchPattern)
              && (m_fromMatchPattern.getMatchScore(xctxt, node)
                  != XPath.MATCH_SCORE_NONE))
      {

        // The following if statement gives level="single" different 
        // behavior from level="multiple", which seems incorrect according 
        // to the XSLT spec.  For now we are leaving this in to replicate 
        // the same behavior in XT, but, for all intents and purposes we 
        // think this is a bug, or there is something about level="single" 
        // that we still don't understand.
        if (!stopAtFirstFound)
          break;
      }

      if (null == countMatchPattern)
        System.out.println(
          "Programmers error! countMatchPattern should never be null!");

      if (countMatchPattern.getMatchScore(xctxt, node)
              != XPath.MATCH_SCORE_NONE)
      {
        ancestors.addElement(node);

        if (stopAtFirstFound)
          break;
      }

      node = dtm.getParent(node);
    }

    return ancestors;
  }  // end getMatchingAncestors method

  /**
   * Get the locale we should be using.
   *
   * @param transformer non-null reference to the the current transform-time state.
   * @param contextNode The node that "." expresses.
   *
   * @return The locale to use. May be specified by "lang" attribute,
   * but if not, use default locale on the system. 
   *
   * @throws TransformerException
   */
  Locale getLocale(TransformerImpl transformer, int contextNode)
          throws TransformerException
  {

    Locale locale = null;

    if (null != m_lang_avt)
    {
      XPathContext xctxt = transformer.getXPathContext();
      String langValue = m_lang_avt.evaluate(xctxt, contextNode, this);

      if (null != langValue)
      {

        // Not really sure what to do about the country code, so I use the
        // default from the system.
        // TODO: fix xml:lang handling.
        locale = new Locale(langValue.toUpperCase(), "");

        //Locale.getDefault().getDisplayCountry());
        if (null == locale)
        {
          transformer.getMsgMgr().warn(this, null, xctxt.getDTM(contextNode).getNode(contextNode),
                                       XSLTErrorResources.WG_LOCALE_NOT_FOUND,
                                       new Object[]{ langValue });  //"Warning: Could not find locale for xml:lang="+langValue);

          locale = Locale.getDefault();
        }
      }
    }
    else
    {
      locale = Locale.getDefault();
    }

    return locale;
  }

  /**
   * Get the number formatter to be used the format the numbers
   *
   * @param transformer non-null reference to the the current transform-time state.
   * @param contextNode The node that "." expresses.
   *
   * ($objectName$) @return The number formatter to be used
   *
   * @throws TransformerException
   */
  private DecimalFormat getNumberFormatter(
          TransformerImpl transformer, int contextNode) throws TransformerException
  {
    // Patch from Steven Serocki
    // Maybe we really want to do the clone in getLocale() and return  
    // a clone of the default Locale??
    Locale locale = (Locale)getLocale(transformer, contextNode).clone();

    // Helper to format local specific numbers to strings.
    DecimalFormat formatter = null;

    //synchronized (locale)
    //{
    //     formatter = (DecimalFormat) NumberFormat.getNumberInstance(locale);
    //}

    String digitGroupSepValue =
      (null != m_groupingSeparator_avt)
      ? m_groupingSeparator_avt.evaluate(
      transformer.getXPathContext(), contextNode, this) : null;
      
      
    // Validate grouping separator if an AVT was used; otherwise this was 
    // validated statically in XSLTAttributeDef.java.
    if ((digitGroupSepValue != null) && (!m_groupingSeparator_avt.isSimple()) &&
        (digitGroupSepValue.length() != 1))
    {
            transformer.getMsgMgr().warn(
               this, XSLTErrorResources.WG_ILLEGAL_ATTRIBUTE_VALUE,
               new Object[]{ Constants.ATTRNAME_NAME, m_groupingSeparator_avt.getName()});   
    }                  
      
      
    String nDigitsPerGroupValue =
      (null != m_groupingSize_avt)
      ? m_groupingSize_avt.evaluate(
      transformer.getXPathContext(), contextNode, this) : null;

    // TODO: Handle digit-group attributes
    if ((null != digitGroupSepValue) && (null != nDigitsPerGroupValue) &&
        // Ignore if separation value is empty string
        (digitGroupSepValue.length() > 0))
    {
      try
      {
        formatter = (DecimalFormat) NumberFormat.getNumberInstance(locale);
        formatter.setGroupingSize(
          Integer.valueOf(nDigitsPerGroupValue).intValue());
        
        DecimalFormatSymbols symbols = formatter.getDecimalFormatSymbols();
        symbols.setGroupingSeparator(digitGroupSepValue.charAt(0));
        formatter.setDecimalFormatSymbols(symbols);
        formatter.setGroupingUsed(true);
      }
      catch (NumberFormatException ex)
      {
        formatter.setGroupingUsed(false);
      }