Example #1
0
 /**
  * Compares two nodes for their unique order.
  *
  * @param node1 first node
  * @param node2 node to be compared
  * @return {@code 0} if the nodes are identical, or {@code 1}/{@code -1} if the first node appears
  *     after/before the second
  */
 static int diff(final ANode node1, final ANode node2) {
   // cache parents of first node
   final ANodeList nl = new ANodeList();
   for (ANode n = node1; n != null; n = n.parent()) {
     if (n == node2) return 1;
     nl.add(n);
   }
   // find lowest common ancestor
   ANode c2 = node2;
   LOOP:
   for (ANode n = node2; (n = n.parent()) != null; ) {
     final int is = nl.size();
     for (int i = 1; i < is; i++) {
       if (n == node1) return -1;
       if (!nl.get(i).is(n)) continue;
       // check which node appears as first LCA child
       final ANode c1 = nl.get(i - 1);
       final BasicNodeIter ir = n.children();
       for (ANode c; (c = ir.next()) != null; ) {
         if (c.is(c1)) return -1;
         if (c.is(c2)) return 1;
       }
       break LOOP;
     }
     c2 = n;
   }
   // subtraction is used instead of comparison to support overflow of node id
   return node1.id - node2.id < 0 ? -1 : 1;
 }
Example #2
0
 @Override
 public Str item(final QueryContext qc, final InputInfo ii) throws QueryException {
   ANode node, par = toNode(exprs[0], qc);
   do {
     node = par;
     par = node.parent();
   } while (par != null);
   final DBNode dbn = toDBNode(node);
   return dbn.kind() == Data.DOC ? Str.get(dbn.data().text(dbn.pre(), true)) : Str.ZERO;
 }
Example #3
0
 /**
  * Returns a copy of the namespace hierarchy.
  *
  * @param sc static context (can be {@code null})
  * @return namespaces
  */
 public final Atts nsScope(final StaticContext sc) {
   final Atts ns = new Atts();
   ANode node = this;
   do {
     final Atts nsp = node.namespaces();
     if (nsp != null) {
       for (int a = nsp.size() - 1; a >= 0; a--) {
         final byte[] key = nsp.name(a);
         if (!ns.contains(key)) ns.add(key, nsp.value(a));
       }
     }
     node = node.parent();
   } while (node != null && node.type == NodeType.ELM);
   if (sc != null) sc.ns.inScope(ns);
   return ns;
 }