Exemplo n.º 1
0
  @Override
  public NodeIter iter(final QueryContext ctx) throws QueryException {
    final Value v = checkCtx(ctx);
    if (!v.type.isNode()) NODESPATH.thrw(input, AxisStep.this, v.type);
    final AxisIter ai = axis.iter((ANode) v);

    final NodeCache nc = new NodeCache();
    for (ANode n; (n = ai.next()) != null; ) if (test.eval(n)) nc.add(n.finish());

    // evaluate predicates
    for (final Expr p : preds) {
      ctx.size = nc.size();
      ctx.pos = 1;
      int c = 0;
      for (int n = 0; n < nc.size(); ++n) {
        ctx.value = nc.get(n);
        final Item i = p.test(ctx, input);
        if (i != null) {
          // assign score value
          nc.get(n).score(i.score());
          nc.item[c++] = nc.get(n);
        }
        ctx.pos++;
      }
      nc.size(c);
    }
    return nc;
  }
Exemplo n.º 2
0
 /**
  * Builds a sequence of elements from a query's result set.
  *
  * @param rs result set
  * @return sequence of elements <tuple/> each of which represents a row from the result set
  * @throws QueryException query exception
  */
 private NodeCache buildResult(final ResultSet rs) throws QueryException {
   try {
     final ResultSetMetaData metadata = rs.getMetaData();
     final int columnCount = metadata.getColumnCount();
     final NodeCache rows = new NodeCache();
     while (rs.next()) {
       final NodeCache columns = new NodeCache();
       for (int k = 1; k <= columnCount; k++) {
         // For each row add column values as children
         final String label = metadata.getColumnLabel(k);
         final Object value = rs.getObject(label);
         // Null values are ignored
         if (value != null) {
           // Column name
           final FAttr columnName = new FAttr(Q_NAME, token(label));
           final NodeCache attr = new NodeCache();
           attr.add(columnName);
           // Column value
           final FTxt columnValue = new FTxt(token(value.toString()));
           final NodeCache ch = new NodeCache();
           ch.add(columnValue);
           // Element <sql:column name='...'>...</sql:column>
           columns.add(new FElem(Q_COLUMN, ch, attr, NS_SQL, null));
         }
       }
       rows.add(new FElem(Q_ROW, columns, null, NS_SQL, null));
     }
     return rows;
   } catch (final SQLException ex) {
     throw SQLEXC.thrw(input, ex.getMessage());
   }
 }
Exemplo n.º 3
0
  @Override
  public Iter iter(final QueryContext ctx) throws QueryException {
    final Value cv = ctx.value;
    final long cs = ctx.size;
    final long cp = ctx.pos;

    try {
      Value r = root != null ? ctx.value(root) : cv;

      if (!cache
          || citer == null
          || lvalue.type != NodeType.DOC
          || r.type != NodeType.DOC
          || !((ANode) lvalue).is((ANode) r)) {
        lvalue = r;
        citer = new NodeCache().random();
        if (r != null) {
          final Iter ir = ctx.iter(r);
          while ((r = ir.next()) != null) {
            ctx.value = r;
            iter(0, citer, ctx);
          }
        } else {
          ctx.value = null;
          iter(0, citer, ctx);
        }
        citer.sort();
      } else {
        citer.reset();
      }
      return citer;
    } finally {
      ctx.value = cv;
      ctx.size = cs;
      ctx.pos = cp;
    }
  }
Exemplo n.º 4
0
  /**
   * Recursive step iterator.
   *
   * @param l current step
   * @param nc node cache
   * @param ctx query context
   * @throws QueryException query exception
   */
  private void iter(final int l, final NodeCache nc, final QueryContext ctx) throws QueryException {

    // cast is safe (steps will always return a {@link NodIter} instance
    final NodeIter ni = (NodeIter) ctx.iter(steps[l]);
    final boolean more = l + 1 != steps.length;
    for (ANode node; (node = ni.next()) != null; ) {
      if (more) {
        ctx.value = node;
        iter(l + 1, nc, ctx);
      } else {
        ctx.checkStop();
        nc.add(node);
      }
    }
  }
Exemplo n.º 5
0
 /**
  * Adds children of a sub node.
  *
  * @param ch child nodes
  * @param nc node cache
  */
 protected final void addDesc(final AxisMoreIter ch, final NodeCache nc) {
   for (ANode n; (n = ch.next()) != null; ) {
     nc.add(n.finish());
     addDesc(n.children(), nc);
   }
 }