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

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

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

com.sun.org.apache.xpath.internal.NodeSet

The NodeSet class can act as either a NodeVector, NodeList, or NodeIterator. However, in order for it to act as a NodeVector or NodeList, it's required that setShouldCacheNodes(true) be called before the first nextNode() is called, in order that nodes can be added as they are fetched. Derived classes that implement iterators must override runTo(int index), in order that they may run the iteration to the given index.

Note that we directly implement the DOM's NodeIterator interface. We do not emulate all the behavior of the standard NodeIterator. In particular, we do not guarantee to present a "live view" of the document ... but in XSLT, the source document should never be mutated, so this should never be an issue.

Thought: Should NodeSet really implement NodeList and NodeIterator, or should there be specific subclasses of it which do so? The advantage of doing it all here is that all NodeSets will respond to the same calls; the disadvantage is that some of them may return less-than-enlightening results when you do so.
@xsl.usage advanced

   *
   * @see <a href="http://www.exslt.org/">EXSLT</a>
   */
  public static NodeList intersection(NodeList nl1, NodeList nl2)
  {
    NodeSet ns1 = new NodeSet(nl1);
    NodeSet ns2 = new NodeSet(nl2);
    NodeSet inter = new NodeSet();


    inter.setShouldCacheNodes(true);


    for (int i = 0; i < ns1.getLength(); i++)
    {
      Node n = ns1.elementAt(i);


      if (ns2.contains(n))
        inter.addElement(n);
    }


    return inter;
  }

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   *
   * @see <a href="http://www.exslt.org/">EXSLT</a>
   */
  public static NodeList difference(NodeList nl1, NodeList nl2)
  {
    NodeSet ns1 = new NodeSet(nl1);
    NodeSet ns2 = new NodeSet(nl2);


    NodeSet diff = new NodeSet();


    diff.setShouldCacheNodes(true);


    for (int i = 0; i < ns1.getLength(); i++)
    {
      Node n = ns1.elementAt(i);


      if (!ns2.contains(n))
        diff.addElement(n);
    }


    return diff;
  }

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   *
   * @see <a href="http://www.exslt.org/">EXSLT</a>
   */
  public static NodeList distinct(NodeList nl)
  {
    NodeSet dist = new NodeSet();
    dist.setShouldCacheNodes(true);


    Hashtable stringTable = new Hashtable();


    for (int i = 0; i < nl.getLength(); i++)
    {
      Node currNode = nl.item(i);
      String key = toString(currNode);


      if (key == null)
        dist.addElement(currNode);
      else if (!stringTable.containsKey(key))
      {
        stringTable.put(key, currNode);
        dist.addElement(currNode);
      }
    }


    return dist;
  }

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   * @see <a href="http://www.exslt.org/">EXSLT</a>
   */
  public static boolean hasSameNode(NodeList nl1, NodeList nl2)
  {


    NodeSet ns1 = new NodeSet(nl1);
    NodeSet ns2 = new NodeSet(nl2);


    for (int i = 0; i < ns1.getLength(); i++)
    {
      if (ns2.contains(ns1.elementAt(i)))
        return true;
    }
    return false;
  }

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        try{
//            int value = -1;
            Document d = getVerifierContext().getRuntimeDocument();
            if (d==null)
                return -1;
            NodeSet ns = new NodeSet(XPathAPI.selectNodeList(d, xpath));
            return ns.getLength();
        }catch(Exception ex){
            ex.printStackTrace();
            return -1;
        }
    }

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            if (d==null)
                return -1;
            XObject result = XPathAPI.eval(d, xpath,
                             (PrefixResolver)new XpathPrefixResolver (d));
            NodeList nl = result.nodelist();
            NodeSet ns = new NodeSet(nl);
            return ns.getLength();
        }catch(Exception ex){
            ex.printStackTrace();
            return -1;
        }
    }

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           traverseChildren(listVector, dtm.getNode(node), tagname,
                            isTagNameWildCard);
         }
       }
       int size = listVector.size();
       NodeSet nodeSet = new NodeSet(size);
       for (int i = 0; i < size; i++)
       {
         nodeSet.addNode((Node) listVector.elementAt(i));
       }
       return (NodeList) nodeSet;
  }

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      {
        traverseChildren(listVector, dtm.getNode(node), namespaceURI, localName, isNamespaceURIWildCard, isLocalNameWildCard);
      }
    }
    int size = listVector.size();
    NodeSet nodeSet = new NodeSet(size);
    for (int i = 0; i < size; i++)
    {
      nodeSet.addNode((Node)listVector.elementAt(i));
    }
    return (NodeList) nodeSet;
  }

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   */
  public static NodeList highest (NodeList nl)
  {
    double maxValue = max(nl);


    NodeSet highNodes = new NodeSet();
    highNodes.setShouldCacheNodes(true);


    if (Double.isNaN(maxValue))
      return highNodes;  // empty Nodeset


    for (int i = 0; i < nl.getLength(); i++)
    {
      Node n = nl.item(i);
      double d = toNumber(n);
      if (d == maxValue)
        highNodes.addElement(n);
    }
    return highNodes;
  }

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   */
  public static NodeList lowest (NodeList nl)
  {
    double minValue = min(nl);


    NodeSet lowNodes = new NodeSet();
    lowNodes.setShouldCacheNodes(true);


    if (Double.isNaN(minValue))
      return lowNodes;  // empty Nodeset


    for (int i = 0; i < nl.getLength(); i++)
    {
      Node n = nl.item(i);
      double d = toNumber(n);
      if (d == minValue)
        lowNodes.addElement(n);
    }
    return lowNodes;
  }

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