Package com.sun.org.apache.xpath.internal

Examples of com.sun.org.apache.xpath.internal.XPathContext

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   * @param root The context node of this step.
   */
  public void setRoot(int root)
  {
    // %OPT% Get this directly from the lpi.
    XPathContext xctxt = wi().getXPathContext();
    m_dtm = xctxt.getDTM(root);
    m_traverser = m_dtm.getAxisTraverser(m_axis);
    m_isFresh = true;
    m_foundLast = false;
    m_root = root;
    m_currentNode = root;
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                    "this context");
        }

        if(null != m_iter)
        {
                XPathContext xctxt = (XPathContext)environment;
                m_dtmMgr = xctxt.getDTMManager();
                m_iter.setRoot(nodeHandle, environment);
                if(!m_iter.isDocOrdered())
                {
                        if(!hasCache())
                                setShouldCacheNodes(true);
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  public void setRoot(int context, Object environment)
  {

    m_context = context;

    XPathContext xctxt = (XPathContext)environment;
    m_execContext = xctxt;
    m_cdtm = xctxt.getDTM(context);

    m_currentContextNode = context; // only if top level?

    // Yech, shouldn't have to do this.  -sb
    if(null == m_prefixResolver)
        m_prefixResolver = xctxt.getNamespaceContext();

    m_lastFetched = DTM.NULL;
    m_foundLast = false;
    m_pos = 0;
    m_length = -1;

    if (m_isTopLevel)
      this.m_stackFrame = xctxt.getVarStack().getStackFrame();

    // reset();
  }
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   * @return  a constant to determine whether the node is accepted,
   *   rejected, or skipped, as defined  above .
   */
  public short acceptNode(int n)
  {
    XPathContext xctxt = getXPathContext();
    try
    {
      xctxt.pushCurrentNode(n);
      for (int i = 0; i < m_nodeTests.length; i++)
      {
        PredicatedNodeTest pnt = m_nodeTests[i];
        XObject score = pnt.execute(xctxt, n);
        if (score != NodeTest.SCORE_NONE)
        {
          // Note that we are assuming there are no positional predicates!
          if (pnt.getPredicateCount() > 0)
          {
            if (pnt.executePredicates(n, xctxt))
              return DTMIterator.FILTER_ACCEPT;
          }
          else
            return DTMIterator.FILTER_ACCEPT;

        }
      }
    }
    catch (javax.xml.transform.TransformerException se)
    {

      // TODO: Fix this.
      throw new RuntimeException(se.getMessage());
    }
    finally
    {
      xctxt.popCurrentNode();
    }
    return DTMIterator.FILTER_SKIP;
  }
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    if(predicateIndex < 0)
      return -1;

    if (m_proximityPositions[predicateIndex] <= 0)
    {
      XPathContext xctxt = getXPathContext();
      try
      {
        OneStepIterator clone = (OneStepIterator) this.clone();

        int root = getRoot();
        xctxt.pushCurrentNode(root);
        clone.setRoot(root, xctxt);

        // clone.setPredicateCount(predicateIndex);
        clone.m_predCount = predicateIndex;

        // Count 'em all
        int count = 1;
        int next;

        while (DTM.NULL != (next = clone.nextNode()))
        {
          count++;
        }

        m_proximityPositions[predicateIndex] += count;
      }
      catch (CloneNotSupportedException cnse)
      {

        // can't happen
      }
      finally
      {
        xctxt.popCurrentNode();
      }
    }

    return m_proximityPositions[predicateIndex];
  }
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    if (-1 != m_length && isPredicateTest && m_predicateIndex < 1)
       return m_length;

    int count = 0;

    XPathContext xctxt = getXPathContext();
    try
    {
      OneStepIterator clone = (OneStepIterator) this.cloneWithReset();

      int root = getRoot();
      xctxt.pushCurrentNode(root);
      clone.setRoot(root, xctxt);

      clone.m_predCount = m_predicateIndex;

      int next;

      while (DTM.NULL != (next = clone.nextNode()))
      {
        count++;
      }
    }
    catch (CloneNotSupportedException cnse)
    {
       // can't happen
    }
    finally
    {
      xctxt.popCurrentNode();
    }
    if (isPredicateTest && m_predicateIndex < 1)
      m_length = count;

    return count;
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            String fmsg = XPATHMessages.createXPATHMessage(XPATHErrorResources.ER_INVALID_XPATH_TYPE, new Object[] {new Integer(type)});
            throw new XPathException(XPathException.TYPE_ERR,fmsg); // Invalid XPath type argument: {0}
        }

        // Cache xpath context?
        XPathContext xpathSupport = new XPathContext();

        // if m_document is not null, build the DTM from the document
        if (null != m_doc) {
            xpathSupport.getDTMHandleFromNode(m_doc);
        }

        XObject xobj = null;
        try {
            xobj = m_xpath.execute(xpathSupport, contextNode, null);
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   */
  public static double max(ExpressionContext myContext, NodeList nl, String expr)
    throws SAXNotSupportedException
  {

    XPathContext xctxt = null;
    if (myContext instanceof XPathContext.XPathExpressionContext)
      xctxt = ((XPathContext.XPathExpressionContext) myContext).getXPathContext();
    else
      throw new SAXNotSupportedException(XSLMessages.createMessage(XSLTErrorResources.ER_INVALID_CONTEXT_PASSED, new Object[]{myContext }));

    if (expr == null || expr.length() == 0)
      return Double.NaN;

    NodeSetDTM contextNodes = new NodeSetDTM(nl, xctxt);
    xctxt.pushContextNodeList(contextNodes);

    double maxValue = - Double.MAX_VALUE;
    for (int i = 0; i < contextNodes.getLength(); i++)
    {
      int contextNode = contextNodes.item(i);
      xctxt.pushCurrentNode(contextNode);

      double result = 0;
      try
      {
        XPath dynamicXPath = new XPath(expr, xctxt.getSAXLocator(),
                                       xctxt.getNamespaceContext(),
                                       XPath.SELECT);
        result = dynamicXPath.execute(xctxt, contextNode, xctxt.getNamespaceContext()).num();
      }
      catch (TransformerException e)
      {
        xctxt.popCurrentNode();
        xctxt.popContextNodeList();
        return Double.NaN;
      }

      xctxt.popCurrentNode();

      if (result > maxValue)
          maxValue = result;
    }

    xctxt.popContextNodeList();
    return maxValue;

  }
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   */
  public static double min(ExpressionContext myContext, NodeList nl, String expr)
    throws SAXNotSupportedException
  {

    XPathContext xctxt = null;
    if (myContext instanceof XPathContext.XPathExpressionContext)
      xctxt = ((XPathContext.XPathExpressionContext) myContext).getXPathContext();
    else
      throw new SAXNotSupportedException(XSLMessages.createMessage(XSLTErrorResources.ER_INVALID_CONTEXT_PASSED, new Object[]{myContext }));

    if (expr == null || expr.length() == 0)
      return Double.NaN;

    NodeSetDTM contextNodes = new NodeSetDTM(nl, xctxt);
    xctxt.pushContextNodeList(contextNodes);

    double minValue = Double.MAX_VALUE;
    for (int i = 0; i < nl.getLength(); i++)
    {
      int contextNode = contextNodes.item(i);
      xctxt.pushCurrentNode(contextNode);

      double result = 0;
      try
      {
        XPath dynamicXPath = new XPath(expr, xctxt.getSAXLocator(),
                                       xctxt.getNamespaceContext(),
                                       XPath.SELECT);
        result = dynamicXPath.execute(xctxt, contextNode, xctxt.getNamespaceContext()).num();
      }
      catch (TransformerException e)
      {
        xctxt.popCurrentNode();
        xctxt.popContextNodeList();
        return Double.NaN;
      }

      xctxt.popCurrentNode();

      if (result < minValue)
          minValue = result;
    }

    xctxt.popContextNodeList();
    return minValue;

  }
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   * @return The sum of the evaluation value on each node
   */
  public static double sum(ExpressionContext myContext, NodeList nl, String expr)
    throws SAXNotSupportedException
  {
    XPathContext xctxt = null;
    if (myContext instanceof XPathContext.XPathExpressionContext)
      xctxt = ((XPathContext.XPathExpressionContext) myContext).getXPathContext();
    else
      throw new SAXNotSupportedException(XSLMessages.createMessage(XSLTErrorResources.ER_INVALID_CONTEXT_PASSED, new Object[]{myContext }));

    if (expr == null || expr.length() == 0)
      return Double.NaN;

    NodeSetDTM contextNodes = new NodeSetDTM(nl, xctxt);
    xctxt.pushContextNodeList(contextNodes);

    double sum = 0;
    for (int i = 0; i < nl.getLength(); i++)
    {
      int contextNode = contextNodes.item(i);
      xctxt.pushCurrentNode(contextNode);

      double result = 0;
      try
      {
        XPath dynamicXPath = new XPath(expr, xctxt.getSAXLocator(),
                                       xctxt.getNamespaceContext(),
                                       XPath.SELECT);
        result = dynamicXPath.execute(xctxt, contextNode, xctxt.getNamespaceContext()).num();
      }
      catch (TransformerException e)
      {
        xctxt.popCurrentNode();
        xctxt.popContextNodeList();
        return Double.NaN;
      }

      xctxt.popCurrentNode();

      sum = sum + result;

    }

    xctxt.popContextNodeList();
    return sum;
  }
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