Examples of org.apache.xpath.objects.XNodeSet

org.apache.xpath.objects.XNodeSet
This class represents an XPath nodeset object, and is capable of converting the nodeset to other types, such as a string. @xsl.usage general

   */
  public XObject execute(XPathContext xctxt)
          throws javax.xml.transform.TransformerException
  {


    XNodeSet iter = new XNodeSet((LocPathIterator)m_clones.getInstance());


    iter.setRoot(xctxt.getCurrentNode(), xctxt);


    return iter;
  }

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   */
  public DTMIterator asIterator(
          XPathContext xctxt, int contextNode)
            throws javax.xml.transform.TransformerException
  {
    XNodeSet iter = new XNodeSet((LocPathIterator)m_clones.getInstance());


    iter.setRoot(contextNode, xctxt);


    return iter;
  }

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  {
    m_docKey = doc;
    m_keyDeclarations = keyDeclarations;
    KeyIterator ki = new KeyIterator(name, keyDeclarations);


    m_keyNodes = new XNodeSet(ki);
    m_keyNodes.allowDetachToRelease(false);
    m_keyNodes.setRoot(doc, xctxt);
  }

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   * @return a set of nodes referenced by the key named <CODE>name</CODE> and the reference <CODE>ref</CODE>. If no node is referenced by this key, an empty node set is returned.
   */
  public XNodeSet getNodeSetDTMByKey(QName name, XMLString ref)


  {
    XNodeSet refNodes = (XNodeSet) getRefsTable().get(ref);
    // clone wiht reset the node set
   try
    {
      if (refNodes != null)
      {
         refNodes = (XNodeSet) refNodes.cloneWithReset();
       }
    }
    catch (CloneNotSupportedException e)
    {
      refNodes = null;
    }


    if (refNodes == null) {
     //  create an empty XNodeSet
      KeyIterator ki = (KeyIterator) (m_keyNodes).getContainedIter();
      XPathContext xctxt = ki.getXPathContext();
      refNodes = new XNodeSet(xctxt.getDTMManager()) {
        public void setRoot(int nodeHandle, Object environment) {
          // Root cannot be set on non-iterated node sets. Ignore it.
        }
      };
      refNodes.reset();
    }


    return refNodes;
  }

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   * @param ref the value of the use clause of the current key for the given node
   * @param node the node to reference
   */
  private void addValueInRefsTable(XPathContext xctxt, XMLString ref, int node) {
    
    XNodeSet nodes = (XNodeSet) m_refsTable.get(ref);
    if (nodes == null)
    {
      nodes = new XNodeSet(node, xctxt.getDTMManager());
      nodes.nextNode();
      m_refsTable.put(ref, nodes);
    }
    else
    {
      // Nodes are passed to this method in document order.  Since we need to
      // suppress duplicates, we only need to check against the last entry
      // in each nodeset.  We use nodes.nextNode after each entry so we can
      // easily compare node against the current node.
      if (nodes.getCurrentNode() != node) {
          nodes.mutableNodeset().addNode(node);
          nodes.nextNode();
      }    
    }
  }

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        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 "
  }

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    if (DTM.NULL == docContext)
      error(xctxt, XPATHErrorResources.ER_CONTEXT_HAS_NO_OWNERDOC, null);


    XObject arg = m_arg0.execute(xctxt);
    int argType = arg.getType();
    XNodeSet nodes = new XNodeSet(xctxt.getDTMManager());
    NodeSetDTM nodeSet = nodes.mutableNodeset();


    if (XObject.CLASS_NODESET == argType)
    {
      DTMIterator ni = arg.iter();
      StringVector usedrefs = null;

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    //  else
    //  {
    //     System.err.println("current node: DTM.NULL");
    //  }


    return new XNodeSet(currentNode, xctxt.getDTMManager());
  }

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         }
    } else {
        // not predicate => ContextNode == CurrentNode
        currentNode = xctxt.getContextNode();
    }
    return new XNodeSet(currentNode, xctxt.getDTMManager());
  }

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                          int stackFrame,
                          Expression expr )
    throws org.apache.xml.utils.WrappedRuntimeException
  {
    PrefixResolver savedResolver = xctxt.getNamespaceContext();
    XNodeSet result = null;


    try
    {
      xctxt.pushCurrentNode(context);
      xctxt.setNamespaceContext(prefixResolver);


      // The setRoot operation can take place with a reset operation, 
      // and so we may not be in the context of LocPathIterator#nextNode, 
      // so we have to set up the variable context, execute the expression, 
      // and then restore the variable context.


      if (isTopLevel)
      {
        // System.out.println("calling m_expr.execute(getXPathContext())");
        VariableStack vars = xctxt.getVarStack();


        // These three statements need to be combined into one operation.
        int savedStart = vars.getStackFrame();
        vars.setStackFrame(stackFrame);


        result = (org.apache.xpath.objects.XNodeSet) expr.execute(xctxt);
        result.setShouldCacheNodes(true);


        // These two statements need to be combined into one operation.
        vars.setStackFrame(savedStart);
      }
      else

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