Пример #1
0
 /**
  * This version merges all elements of the same name, regardless where they appear. Counting
  * really only works for attributes and text() nodes.
  *
  * @param xo
  * @param elementName
  * @return
  */
 public float getAvgLength(XmlObject xo, String elementName) {
   Double val;
   log.debug("start query elem='" + elementName + "' " + xo.getDbID());
   if (elementName.startsWith("@")) {
     val =
         (Double)
             getSession()
                 .createQuery(
                     "select avg( length (content) ) from XMLNode "
                         + "where xmlObject = :xo and xpathHolder.name = :name ")
                 .setEntity("xo", xo)
                 .setString("name", elementName)
                 .uniqueResult();
   } else {
     val =
         (Double)
             getSession()
                 .createQuery(
                     "select avg(length( content )) from XMLNode "
                         + "where xmlObject = :xo and xpathHolder.parent.name = :name "
                         + "and xpathHolder.name = 'text()'")
                 .setEntity("xo", xo)
                 .setString("name", elementName)
                 .uniqueResult();
   }
   log.debug("end query");
   return val.floatValue();
 }
Пример #2
0
 /**
  * The normal getById performs very badly, provide the xmlObject to find the node much quicker.
  *
  * @param id
  * @param obj
  * @return
  */
 public XMLNode getByIdObject(XmlObject obj, Long id) {
   return (XMLNode)
       getSession()
           .createSQLQuery(
               "select * from xml_node_" + obj.getDbID() + " where xml_node_id = :nodeId")
           .addEntity(XMLNode.class)
           .setLong("nodeId", id)
           .uniqueResult();
 }
Пример #3
0
 public XMLNode getStatelessByIdObject(XmlObject obj, Long id) {
   XMLNode x =
       (XMLNode)
           DB.getStatelessSession()
               .createSQLQuery(
                   "select * from xml_node_" + obj.getDbID() + " where xml_node_id = :nodeId")
               .addEntity(XMLNode.class)
               .setLong("nodeId", id)
               .uniqueResult();
   if (x != null) x.setChildren(new ArrayList<XMLNode>());
   x.setXpathHolder(DB.getXpathHolderDAO().findById(x.getXpathHolder().getDbID(), false));
   return x;
 }
Пример #4
0
  /**
   * Cursor over all nodes. (You still have to get XpathHolders the normal way) Call the index
   * function on given object. Proceeds in node order.
   *
   * @param xo
   * @param ni
   */
  public void indexNodes(XmlObject xo, NodeIndexer ni) {
    StatelessSession ss = DB.getStatelessSession();
    Stack<XMLNode> stack = new Stack<XMLNode>();
    HashMap<Long, XpathHolder> xpathCache = new HashMap<Long, XpathHolder>();
    ScrollableResults sr = null;

    try {
      sr =
          ss.createSQLQuery("select * from xml_node_" + xo.getDbID() + " order by xml_node_id")
              .addEntity(XMLNode.class)
              .scroll(ScrollMode.FORWARD_ONLY);

      while (sr.next()) {

        XMLNode x = (XMLNode) sr.get()[0];
        while (!stack.isEmpty()) {
          if ((x.getParentNode() == null)
              || (stack.peek().getNodeId() != x.getParentNode().getNodeId())) stack.pop();
          else break;
        }
        stack.push(x);
        // now the xpathholder
        XpathHolder path = xpathCache.get(x.getXpathHolder().getDbID());
        if (path == null) {
          path = DB.getXpathHolderDAO().findById(x.getXpathHolder().getDbID(), false);
          xpathCache.put(path.getDbID(), path);
        }
        x.setXpathHolder(path);
        x.setXmlObject(xo);
        // node ready to index
        ni.index(x);
      }
      ni.index(null);
    } catch (Exception e) {
      log.error("Error while scrolling XMLNodes for indexing.", e);
    } finally {
      if (sr != null) sr.close();
    }
  }
Пример #5
0
 public Map<Long, Object[]> getStatsForXpaths(XmlObject xo) {
   List<Object[]> queryResult =
       getSession()
           .createSQLQuery(
               "select xpath_summary_id, avg( length( content )), count( distinct content )"
                   + " from xml_node_"
                   + xo.getDbID()
                   + " group by xpath_summary_id")
           .list();
   Map<Long, Object[]> result = new HashMap<Long, Object[]>();
   for (Object[] oa : queryResult) {
     if (oa[0] == null) continue;
     Long xp = ((Integer) oa[0]).longValue();
     BigDecimal f = (BigDecimal) oa[1];
     BigInteger count = (BigInteger) oa[2];
     Object[] val = new Object[2];
     val[0] = (f == null ? -1f : f.floatValue());
     val[1] = (count == null ? -1l : count.longValue());
     result.put(xp, val);
   }
   return result;
 }