Ejemplo n.º 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;
 }
Ejemplo n.º 2
0
  /**
   * Parses a jar descriptor.
   *
   * @param io XML input
   * @return jar descriptor container
   * @throws QueryException query exception
   */
  public JarDesc parse(final IO io) throws QueryException {
    final JarDesc desc = new JarDesc();
    try {
      final ANode node = new DBNode(io).children().next();
      for (final ANode next : node.children()) {
        if (next.type != NodeType.ELM) continue;

        final QNm name = next.qname();
        // ignore namespace to improve compatibility
        if (eq(JAR, name.local())) desc.jars.add(next.string());
        else if (eq(CLASS, name.local())) desc.classes.add(next.string());
        // [CG] Packaging: add warning if unknown elements are encountered
      }
      if (desc.jars.isEmpty()) throw BXRE_JARDESC_X.get(info, NOJARS);
      else if (desc.classes.isEmpty()) throw BXRE_JARDESC_X.get(info, NOCLASSES);
      return desc;
    } catch (final IOException ex) {
      throw BXRE_JARFAIL_X.get(info, ex);
    }
  }
Ejemplo n.º 3
0
  /**
   * Evaluates the specified function and creates a response.
   *
   * @throws Exception exception (including unexpected ones)
   */
  void create() throws Exception {
    // bind variables
    final StaticFunc sf = function.function;
    final Expr[] args = new Expr[sf.args.length];
    function.bind(http, args, error);

    // wrap function with a function call
    final MainModule mm = new MainModule(sf, args);

    // assign main module and http context and register process
    query.mainModule(mm);
    query.http(http);
    query.context.register(query);

    String redirect = null, forward = null;
    RestXqRespBuilder resp = null;
    try {
      // compile and evaluate query
      query.compile();
      final Iter iter = query.iter();
      Item item = iter.next();

      // handle response element
      if (item != null && item instanceof ANode) {
        final ANode node = (ANode) item;
        // send redirect to browser
        if (REST_REDIRECT.eq(node)) {
          final ANode ch = node.children().next();
          if (ch == null || ch.type != NodeType.TXT) throw function.error(NO_VALUE, node.name());
          redirect = string(ch.string()).trim();
          return;
        }
        // server-side forwarding
        if (REST_FORWARD.eq(node)) {
          final ANode ch = node.children().next();
          if (ch == null || ch.type != NodeType.TXT) throw function.error(NO_VALUE, node.name());
          forward = string(ch.string()).trim();
          return;
        }
        if (REST_RESPONSE.eq(node)) {
          resp = new RestXqRespBuilder();
          resp.build(node, function, iter, http);
          return;
        }
      }

      // HEAD method must return a single response element
      if (function.methods.size() == 1 && function.methods.contains(HTTPMethod.HEAD.name()))
        throw function.error(HEAD_METHOD);

      // serialize result
      final SerializerOptions sp = function.output;
      http.sopts(sp);
      http.initResponse();
      final Serializer ser = Serializer.get(http.res.getOutputStream(), sp);
      for (; item != null; item = iter.next()) ser.serialize(item);
      ser.close();

    } finally {
      query.close();
      query.context.unregister(query);

      if (redirect != null) {
        http.res.sendRedirect(redirect);
      } else if (forward != null) {
        http.req.getRequestDispatcher(forward).forward(http.req, http.res);
      } else if (resp != null) {
        if (resp.status != 0) http.status(resp.status, resp.message, resp.error);
        http.res.getOutputStream().write(resp.cache.toArray());
      }
    }
  }
Ejemplo n.º 4
0
 /**
  * Adds children of a sub node.
  *
  * @param ch child nodes
  * @param nb node cache
  */
 static void addDesc(final BasicNodeIter ch, final ANodeList nb) {
   for (ANode n; (n = ch.next()) != null; ) {
     nb.add(n.finish());
     addDesc(n.children(), nb);
   }
 }