Package org.apache.xpath

Examples of org.apache.xpath.XPathContext


   * @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;
  }
View Full Code Here


   * @return The node set after evaluation
   */
  public static NodeList map(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();
     
    NodeSetDTM contextNodes = new NodeSetDTM(nl, xctxt);
    xctxt.pushContextNodeList(contextNodes);
   
    NodeSet resultSet = new NodeSet();
    resultSet.setShouldCacheNodes(true);
   
    for (int i = 0; i < nl.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 (!resultSet.contains(n))
              resultSet.addNode(n);
          }
        }
        else
        {
          Document lDoc = null;

          DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
          dbf.setNamespaceAware(true);
          DocumentBuilder db = dbf.newDocumentBuilder();
          lDoc = db.newDocument();
       
          Element element = null;
          if (object instanceof XNumber)
            element = lDoc.createElementNS(EXSL_URI, "exsl:number");
          else if (object instanceof XBoolean)
            element = lDoc.createElementNS(EXSL_URI, "exsl:boolean");
          else
            element = lDoc.createElementNS(EXSL_URI, "exsl:string");
         
          Text textNode = lDoc.createTextNode(object.str());
          element.appendChild(textNode);
          resultSet.addNode(element);
        }
      }
      catch (Exception e)
      {
        xctxt.popCurrentNode();
        xctxt.popContextNodeList();
        return new NodeSet();
      }
     
      xctxt.popCurrentNode();
     
    }     
     
    xctxt.popContextNodeList();
    return resultSet;
  }
View Full Code Here

  public static XObject evaluate(ExpressionContext myContext, String xpathExpr)
    throws SAXNotSupportedException
  {
    if (myContext instanceof XPathContext.XPathExpressionContext)
    {
      XPathContext xctxt = null;
      try
      {
        xctxt = ((XPathContext.XPathExpressionContext) myContext).getXPathContext();
        XPath dynamicXPath = new XPath(xpathExpr, xctxt.getSAXLocator(),
                                       xctxt.getNamespaceContext(),
                                       XPath.SELECT);

        return dynamicXPath.execute(xctxt, myContext.getContextNode(),
                                    xctxt.getNamespaceContext());
      }
      catch (TransformerException e)
      {
        return new XNodeSet(xctxt.getDTMManager());
      }
    }
    else
      throw new SAXNotSupportedException(XSLMessages.createMessage(XSLTErrorResources.ER_INVALID_CONTEXT_PASSED, new Object[]{myContext })); //"Invalid context passed to evaluate "
  }
View Full Code Here

   * @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++)
      {
View Full Code Here

   */
  public void transformSelectedNodes(TransformerImpl transformer)
            throws TransformerException
  {

    final XPathContext xctxt = transformer.getXPathContext();
    final int sourceNode = xctxt.getCurrentNode();
    DTMIterator sourceNodes = m_selectExpression.asIterator(xctxt, sourceNode);
    VariableStack vars = xctxt.getVarStack();
    int nParams = getParamElemCount();
    int thisframe = vars.getStackFrame();
    StackGuard guard = transformer.getStackGuard();
    boolean check = (guard.getRecursionLimit() > -1) ? true : false;
     
    try
    {

      final Vector keys = (m_sortElems == null)
                          ? null
                          : transformer.processSortKeys(this, sourceNode);

      // Sort if we need to.
      if (null != keys)
        sourceNodes = sortNodes(xctxt, keys, sourceNodes);

      if (TransformerImpl.S_DEBUG)
      {
        transformer.getTraceManager().fireSelectedEvent(sourceNode, this,
                "select", new XPath(m_selectExpression),
                new org.apache.xpath.objects.XNodeSet(sourceNodes));
      }

      final ResultTreeHandler rth = transformer.getResultTreeHandler();
      ContentHandler chandler = rth.getContentHandler();
      final StylesheetRoot sroot = transformer.getStylesheet();
      final TemplateList tl = sroot.getTemplateListComposed();
      final boolean quiet = transformer.getQuietConflictWarnings();
     
      // Should be able to get this from the iterator but there must be a bug.
      DTM dtm = xctxt.getDTM(sourceNode);
     
      int argsFrame = -1;
      if(nParams > 0)
      {
        // This code will create a section on the stack that is all the
        // evaluated arguments.  These will be copied into the real params
        // section of each called template.
        argsFrame = vars.link(nParams);
        vars.setStackFrame(thisframe);
       
        for (int i = 0; i < nParams; i++)
        {
          ElemWithParam ewp = m_paramElems[i];
          XObject obj = ewp.getValue(transformer, sourceNode);
         
          vars.setLocalVariable(i, obj, argsFrame);
        }
        vars.setStackFrame(argsFrame);
      }
     
      xctxt.pushCurrentNode(DTM.NULL);
      IntStack currentNodes = xctxt.getCurrentNodeStack();
     
      xctxt.pushCurrentExpressionNode(DTM.NULL);
      IntStack currentExpressionNodes = xctxt.getCurrentExpressionNodeStack();    

      xctxt.pushSAXLocatorNull();
      xctxt.pushContextNodeList(sourceNodes);
      transformer.pushElemTemplateElement(null);
      // pushParams(transformer, xctxt);
     
      int child;
      while (DTM.NULL != (child = sourceNodes.nextNode()))
      {
        currentNodes.setTop(child);
        currentExpressionNodes.setTop(child);

        if(xctxt.getDTM(child) != dtm)
        {
          dtm = xctxt.getDTM(child);
        }
       
        final int exNodeType = dtm.getExpandedTypeID(child);
        final int nodeType = dtm.getNodeType(child);

        final QName mode = transformer.getMode();

        ElemTemplate template = tl.getTemplateFast(xctxt, child, exNodeType, mode,
                                      -1, quiet, dtm);

        // If that didn't locate a node, fall back to a default template rule.
        // See http://www.w3.org/TR/xslt#built-in-rule.
        if (null == template)
        {
          switch (nodeType)
          {
          case DTM.DOCUMENT_FRAGMENT_NODE :
          case DTM.ELEMENT_NODE :
            template = sroot.getDefaultRule();
            // %OPT% direct faster?
            break;
          case DTM.ATTRIBUTE_NODE :
          case DTM.CDATA_SECTION_NODE :
          case DTM.TEXT_NODE :
            // if(rth.m_elemIsPending || rth.m_docPending)
            //  rth.flushPending(true);
            transformer.pushPairCurrentMatched(sroot.getDefaultTextRule(), child);
            transformer.setCurrentElement(sroot.getDefaultTextRule());
            // dtm.dispatchCharactersEvents(child, chandler, false);
            dtm.dispatchCharactersEvents(child, rth, false);
            transformer.popCurrentMatched();
            continue;
          case DTM.DOCUMENT_NODE :
            template = sroot.getDefaultRootRule();
            break;
          default :

            // No default rules for processing instructions and the like.
            continue;
          }
        }
        else
        {
          transformer.setCurrentElement(template);
        }
               
        transformer.pushPairCurrentMatched(template, child);
        if (check)
          guard.checkForInfinateLoop();

        int currentFrameBottom;  // See comment with unlink, below
        if(template.m_frameSize > 0)
        {
          xctxt.pushRTFContext();
          currentFrameBottom = vars.getStackFrame()// See comment with unlink, below
          vars.link(template.m_frameSize);
          // You can't do the check for nParams here, otherwise the
          // xsl:params might not be nulled.
          if(/* nParams > 0 && */ template.m_inArgsSize > 0)
          {
            int paramIndex = 0;
            for (ElemTemplateElement elem = template.getFirstChildElem();
                 null != elem; elem = elem.getNextSiblingElem())
            {
              if(Constants.ELEMNAME_PARAMVARIABLE == elem.getXSLToken())
              {
                ElemParam ep = (ElemParam)elem;
               
                int i;
                for (i = 0; i < nParams; i++)
                {
                  ElemWithParam ewp = m_paramElems[i];
                  if(ewp.m_qnameID == ep.m_qnameID)
                  {
                    XObject obj = vars.getLocalVariable(i, argsFrame);
                    vars.setLocalVariable(paramIndex, obj);
                    break;
                  }
                }
                if(i == nParams)
                  vars.setLocalVariable(paramIndex, null);
              }
              else
                break;
              paramIndex++;
            }
           
          }
        }
        else
          currentFrameBottom = 0;

        // Fire a trace event for the template.
        if (TransformerImpl.S_DEBUG)
          transformer.getTraceManager().fireTraceEvent(template);

        // And execute the child templates.
        // Loop through the children of the template, calling execute on
        // each of them.
        for (ElemTemplateElement t = template.m_firstChild;
             t != null; t = t.m_nextSibling)
        {
          xctxt.setSAXLocator(t);
          try
          {
            transformer.pushElemTemplateElement(t);
            t.execute(transformer);
          }
          finally
          {
            transformer.popElemTemplateElement();
          }
        }
       
        if (TransformerImpl.S_DEBUG)
        transformer.getTraceManager().fireTraceEndEvent(template);
     
        if(template.m_frameSize > 0)
        {
          // See Frank Weiss bug around 03/19/2002 (no Bugzilla report yet).
          // While unlink will restore to the proper place, the real position
          // may have been changed for xsl:with-param, so that variables
          // can be accessed. 
          // of right now.
          // More:
          // When we entered this function, the current
          // frame buffer (cfb) index in the variable stack may
          // have been manually set.  If we just call
          // unlink(), however, it will restore the cfb to the
          // previous link index from the link stack, rather than
          // the manually set cfb.  So,
          // the only safe solution is to restore it back
          // to the same position it was on entry, since we're
          // really not working in a stack context here. (Bug4218)
          vars.unlink(currentFrameBottom);
          xctxt.popRTFContext();
        }
         
        transformer.popCurrentMatched();
       
      } // end while (DTM.NULL != (child = sourceNodes.nextNode()))
    }
    catch (SAXException se)
    {
      transformer.getErrorListener().fatalError(new TransformerException(se));
    }
    finally
    {
      if (TransformerImpl.S_DEBUG)
        transformer.getTraceManager().fireSelectedEndEvent(sourceNode, this,
                "select", new XPath(m_selectExpression),
                new org.apache.xpath.objects.XNodeSet(sourceNodes));
     
      // Unlink to the original stack frame 
      if(nParams > 0)
        vars.unlink(thisframe);
      xctxt.popSAXLocator();
      xctxt.popContextNodeList();
      transformer.popElemTemplateElement();
      xctxt.popCurrentExpressionNode();
      xctxt.popCurrentNode();
      sourceNodes.detach();
    }
  }
View Full Code Here

      // 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;
View Full Code Here

            String fmsg = XSLMessages.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, m_resolver );        
View Full Code Here

    AVT avt = getLiteralResultAttribute(rawName);

    if ((null != avt) && avt.getRawName().equals(rawName))
    {
      XPathContext xctxt = transformer.getXPathContext();

      return avt.evaluate(xctxt,
            xctxt.getDTMHandleFromNode(sourceNode),
            this);
    }

    return null;
  }
View Full Code Here

    AVT avt = getLiteralResultAttribute(rawName);

    if ((null != avt) && avt.getRawName().equals(rawName))
    {
      XPathContext xctxt = transformer.getXPathContext();

      return avt.evaluate(xctxt,
            xctxt.getDTMHandleFromNode(sourceNode),
            this);
    }

    return null;
  }
View Full Code Here

   */
  public TransformerImpl(StylesheetRoot stylesheet)
   // throws javax.xml.transform.TransformerException   
  {
    setStylesheet(stylesheet);
    setXPathContext(new XPathContext(this));
    getXPathContext().setNamespaceContext(stylesheet);
    m_stackGuard = new StackGuard(this);
  }
View Full Code Here

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