Example #1
0
  /**
   * Finds a probability for the variable encoded by condition in the wsdList.
   *
   * @param wsdList The node containing the probabilities.
   * @param condition The condition to match.
   * @return The probability of the condition being true.
   */
  protected Double findProbability(ANode wsdList, String strCondition) {
    try {
      Condition condition = new Condition(strCondition);
      // find node matching variable name
      for (ANode variable : wsdList.children()) {
        if (condition.name.equals(new String(variable.qname().local()))) {
          String valName = "val-" + condition.value;
          // found the right node, now find the right attribute matching variable value
          for (ANode attr : variable.attributes()) {
            if (valName.equals(new String(attr.qname().local()))) {
              // found the right attribute, parse the value as a double
              return Double.parseDouble(new String(attr.string()));
            }
          }

          // no attribute matching the value was found, return 0.0
          return 0.0;
        }
      }

      // no node matching the variable was found, return 0.0
      return 0.0;
    } catch (NumberFormatException e) {
      // malformed probability, fall back to 0.0
      // TODO: submit message to BaseX logging
      System.err.println(
          "malformed probability for condition " + strCondition + ": " + e.getMessage());
      return 0.0;
    }
  }
Example #2
0
 /**
  * Returns the value of the specified attribute or {@code null}.
  *
  * @param name attribute to be found
  * @return attribute value
  */
 public byte[] attribute(final QNm name) {
   final BasicNodeIter iter = attributes();
   while (true) {
     final ANode node = iter.next();
     if (node == null) return null;
     if (node.qname().eq(name)) return node.string();
   }
 }
Example #3
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);
    }
  }
Example #4
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());
      }
    }
  }