Examples of org.apache.xpath.XPathContext

org.apache.xpath.XPathContext
Default class for the runtime execution context for XPath.
This class extends DTMManager but does not directly implement it.

   */
  public void execute(
          TransformerImpl transformer)
            throws TransformerException
  {
                XPathContext xctxt = transformer.getXPathContext();
      
    try
    {
      int sourceNode = xctxt.getCurrentNode();
      xctxt.pushCurrentNode(sourceNode);
      DTM dtm = xctxt.getDTM(sourceNode);
      short nodeType = dtm.getNodeType(sourceNode);


      if ((DTM.DOCUMENT_NODE != nodeType) && (DTM.DOCUMENT_FRAGMENT_NODE != nodeType))
      {
        SerializationHandler rthandler = transformer.getSerializationHandler();


        if (transformer.getDebug())
          transformer.getTraceManager().fireTraceEvent(this);
            
        // TODO: Process the use-attribute-sets stuff
        ClonerToResultTree.cloneToResultTree(sourceNode, nodeType, dtm, 
                                             rthandler, false);


        if (DTM.ELEMENT_NODE == nodeType)
        {
          super.execute(transformer);
          SerializerUtils.processNSDecls(rthandler, sourceNode, nodeType, dtm);
          transformer.executeChildTemplates(this, true);
          
          String ns = dtm.getNamespaceURI(sourceNode);
          String localName = dtm.getLocalName(sourceNode);
          transformer.getResultTreeHandler().endElement(ns, localName,
                                                        dtm.getNodeName(sourceNode));
        }
        if (transformer.getDebug())
      transformer.getTraceManager().fireTraceEndEvent(this);         
      }
      else
      {
        if (transformer.getDebug())
          transformer.getTraceManager().fireTraceEvent(this);


        super.execute(transformer);
        transformer.executeChildTemplates(this, true);


        if (transformer.getDebug())
          transformer.getTraceManager().fireTraceEndEvent(this);
      }
    }
    catch(org.xml.sax.SAXException se)
    {
      throw new TransformerException(se);
    }
    finally
    {
      xctxt.popCurrentNode();
    }
  }

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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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   * @return The node set after evaluation
   */
  public static NodeList closure(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 new NodeSet();
          
    NodeSet closureSet = new NodeSet();
    closureSet.setShouldCacheNodes(true);
        
    NodeList iterationList = nl;
    do
    {
    
      NodeSet iterationSet = new NodeSet();


      NodeSetDTM contextNodes = new NodeSetDTM(iterationList, xctxt);
      xctxt.pushContextNodeList(contextNodes);
      
      for (int i = 0; i < iterationList.getLength(); i++)
      {
        int contextNode = contextNodes.item(i);
        xctxt.pushCurrentNode(contextNode);


        XObject object = null;
        try
        {
          XPath dynamicXPath = new XPath(expr, xctxt.getSAXLocator(),
                                         xctxt.getNamespaceContext(),
                                         XPath.SELECT);
          object = dynamicXPath.execute(xctxt, contextNode, xctxt.getNamespaceContext());
          
          if (object instanceof XNodeSet)
          {
            NodeList nodelist = null;
            nodelist = ((XNodeSet)object).nodelist();
        
            for (int k = 0; k < nodelist.getLength(); k++)
            {
              Node n = nodelist.item(k);
              if (!iterationSet.contains(n))
                iterationSet.addNode(n);
            }        
          }
          else
          {
            xctxt.popCurrentNode();
            xctxt.popContextNodeList();
            return new NodeSet();
          }          
        }
        catch (TransformerException e)
        {
          xctxt.popCurrentNode();
          xctxt.popContextNodeList();
          return new NodeSet();
        }
      
        xctxt.popCurrentNode();
            
      }
      
      xctxt.popContextNodeList();
      
      iterationList = iterationSet;
      
      for (int i = 0; i < iterationList.getLength(); i++)
      {

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  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);

View Full Code Here


    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();
        }

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      // Transformation target
      String target =  elem.getAttribute("target", 
                                         context.getContextNode(),
                                         context.getTransformer());
      
      XPathContext xctxt = context.getTransformer().getXPathContext();
      int xt = xctxt.getDTMHandleFromNode(context.getContextNode());
 
      // Get System Id for stylesheet; to be used to resolve URIs to other stylesheets.
      String sysId = elem.getSystemId();
      
      NodeList ssNodes = null;

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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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   * @throws TransformerException
   */
  public void execute(TransformerImpl transformer) throws TransformerException
  {


    XPathContext xctxt = transformer.getXPathContext();
    SerializationHandler rth = transformer.getResultTreeHandler();


    if (transformer.getDebug())
      transformer.getTraceManager().fireTraceEvent(this);


    try
    {
      // Optimize for "."
      if (false && m_isDot && !transformer.getDebug())
      {
        int child = xctxt.getCurrentNode();
        DTM dtm = xctxt.getDTM(child);


        xctxt.pushCurrentNode(child);


        if (m_disableOutputEscaping)
          rth.processingInstruction(
            javax.xml.transform.Result.PI_DISABLE_OUTPUT_ESCAPING, "");


        try
        {
          dtm.dispatchCharactersEvents(child, rth, false);
        }
        finally
        {
          if (m_disableOutputEscaping)
            rth.processingInstruction(
              javax.xml.transform.Result.PI_ENABLE_OUTPUT_ESCAPING, "");


          xctxt.popCurrentNode();
        }
      }
      else
      {
        xctxt.pushNamespaceContext(this);


        int current = xctxt.getCurrentNode();


        xctxt.pushCurrentNodeAndExpression(current, current);


        if (m_disableOutputEscaping)
          rth.processingInstruction(
            javax.xml.transform.Result.PI_DISABLE_OUTPUT_ESCAPING, "");


        try
        {
          Expression expr = m_selectExpression.getExpression();


          if (transformer.getDebug())
          {
            XObject obj = expr.execute(xctxt);


            transformer.getTraceManager().fireSelectedEvent(current, this,
                    "select", m_selectExpression, obj);
            obj.dispatchCharactersEvents(rth);
          }
          else
          {
            expr.executeCharsToContentHandler(xctxt, rth);
          }
        }
        finally
        {
          if (m_disableOutputEscaping)
            rth.processingInstruction(
              javax.xml.transform.Result.PI_ENABLE_OUTPUT_ESCAPING, "");


          xctxt.popNamespaceContext();
          xctxt.popCurrentNodeAndExpression();
        }
      }
    }
    catch (SAXException se)
    {

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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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