static JsonNode *
json_serializable_real_serialize (JsonSerializable *serializable,
                                  const gchar      *name,
                                  const GValue     *value,
                                  GParamSpec       *pspec)
{
  JSON_NOTE (GOBJECT, "Default serialization for property '%s'", pspec->name);
  return json_serialize_pspec (value, pspec);
}
예제 #2
0
파일: json-serializable.c 프로젝트: dov/giv
static gboolean
json_serializable_real_deserialize (JsonSerializable *serializable,
                                    const gchar      *name,
                                    GValue           *value,
                                    GParamSpec       *pspec,
                                    JsonNode         *node)
{
  JSON_NOTE (GOBJECT, "Default deserialization for property '%s'", pspec->name);
  return json_deserialize_pspec (value, pspec, node);
}
예제 #3
0
static GObject *
json_gobject_new (GType       gtype,
                  JsonObject *object)
{
  JsonSerializableIface *iface = NULL;
  JsonSerializable *serializable = NULL;
  gboolean find_property;
  gboolean deserialize_property;
  gboolean set_property;
  GList *members, *members_left, *l;
  guint n_members;
  GObjectClass *klass;
  GObject *retval;
  GArray *construct_params;
  gint i;

  klass = g_type_class_ref (gtype);

  n_members = json_object_get_size (object);
  members = json_object_get_members (object);
  members_left = NULL;

  /* first pass: construct-only properties; here we cannot use Serializable
   * because we don't have an instance yet; we use the default implementation
   * of json_deserialize_pspec() to deserialize known types
   *
   * FIXME - find a way to allow deserialization for these properties
   */
  construct_params = g_array_sized_new (FALSE, FALSE, sizeof (GParameter), n_members);

  for (l = members; l != NULL; l = l->next)
    {
      const gchar *member_name = l->data;
      GParamSpec *pspec;
      GParameter param = { NULL, };
      JsonNode *val;
      gboolean res = FALSE;

      pspec = g_object_class_find_property (klass, member_name);
      if (!pspec)
        goto next_member;

      /* we only apply construct-only properties here */
      if ((pspec->flags & G_PARAM_CONSTRUCT_ONLY) == 0)
        goto next_member;

      if (!(pspec->flags & G_PARAM_WRITABLE))
        goto next_member;

      g_value_init (&param.value, G_PARAM_SPEC_VALUE_TYPE (pspec));

      val = json_object_get_member (object, member_name);
      res = json_deserialize_pspec (&param.value, pspec, val);
      if (!res)
	{
	  g_warning ("Failed to deserialize \"%s\" property of type \"%s\" for an object of type \"%s\"",
		     pspec->name, G_VALUE_TYPE_NAME (&param.value), g_type_name (gtype));

	  g_value_unset (&param.value);
	}
      else
        {
          param.name = g_strdup (pspec->name);

          g_array_append_val (construct_params, param);

          continue;
        }

    next_member:
      members_left = g_list_prepend (members_left, l->data);
    }

  retval = g_object_newv (gtype,
                          construct_params->len,
                          (GParameter *) construct_params->data);

  /* free the contents of the GArray */
  for (i = 0; i < construct_params->len; i++)
    {
      GParameter *param = &g_array_index (construct_params, GParameter, i);

      g_free ((gchar *) param->name);
      g_value_unset (&param->value);
    }

  g_array_free (construct_params, TRUE);
  g_list_free (members);

  /* we use g_list_prepend() above, but we want to maintain
   * the ordering of json_object_get_members() here
   */
  members = g_list_reverse (members_left);

  /* do the Serializable type check once */
  if (g_type_is_a (gtype, JSON_TYPE_SERIALIZABLE))
    {
      serializable = JSON_SERIALIZABLE (retval);
      iface = JSON_SERIALIZABLE_GET_IFACE (serializable);
      find_property = (iface->find_property != NULL);
      deserialize_property = (iface->deserialize_property != NULL);
      set_property = (iface->set_property != NULL);
    }
  else
    {
      find_property = FALSE;
      deserialize_property = FALSE;
      set_property = FALSE;
    }

  g_object_freeze_notify (retval);

  for (l = members; l != NULL; l = l->next)
    {
      const gchar *member_name = l->data;
      GParamSpec *pspec;
      JsonNode *val;
      GValue value = { 0, };
      gboolean res = FALSE;

      if (find_property)
        pspec = json_serializable_find_property (serializable, member_name);
      else
        pspec = g_object_class_find_property (klass, member_name);

      if (pspec == NULL)
        continue;

      /* we should have dealt with these above */
      if (pspec->flags & G_PARAM_CONSTRUCT_ONLY)
        continue;

      if (!(pspec->flags & G_PARAM_WRITABLE))
        continue;

      g_value_init (&value, G_PARAM_SPEC_VALUE_TYPE (pspec));

      val = json_object_get_member (object, member_name);

      if (deserialize_property)
        {
          JSON_NOTE (GOBJECT, "Using JsonSerializable for property '%s'", pspec->name);
          res = json_serializable_deserialize_property (serializable,
                                                        pspec->name,
                                                        &value,
                                                        pspec,
                                                        val);
        }

      if (!res)
        {
          JSON_NOTE (GOBJECT, "Using json_deserialize_pspec for property '%s'", pspec->name);
          res = json_deserialize_pspec (&value, pspec, val);
        }

      if (res)
        {
          JSON_NOTE (GOBJECT, "Calling set_property('%s', '%s')",
                     pspec->name,
                     g_type_name (G_VALUE_TYPE (&value)));

          if (set_property)
            json_serializable_set_property (serializable, pspec, &value);
          else
            g_object_set_property (retval, pspec->name, &value);
        }
      else
	g_warning ("Failed to deserialize \"%s\" property of type \"%s\" for an object of type \"%s\"",
		   pspec->name, g_type_name (G_VALUE_TYPE (&value)), g_type_name (gtype));

      g_value_unset (&value);
    }

  g_list_free (members);

  g_object_thaw_notify (retval);

  g_type_class_unref (klass);

  return retval;
}
예제 #4
0
static guint
json_parse_statement (JsonParser  *parser,
                      JsonScanner *scanner)
{
  JsonParserPrivate *priv = parser->priv;
  guint token;

  token = json_scanner_peek_next_token (scanner);
  switch (token)
    {
    case G_TOKEN_LEFT_CURLY:
      JSON_NOTE (PARSER, "Statement is object declaration");
      return json_parse_object (parser, scanner, &priv->root);

    case G_TOKEN_LEFT_BRACE:
      JSON_NOTE (PARSER, "Statement is array declaration");
      return json_parse_array (parser, scanner, &priv->root);

    /* some web APIs are not only passing the data structures: they are
     * also passing an assigment, which makes parsing horribly complicated
     * only because web developers are lazy, and writing "var foo = " is
     * evidently too much to request from them.
     */
    case JSON_TOKEN_VAR:
      {
        guint next_token;
        gchar *name;

        JSON_NOTE (PARSER, "Statement is an assignment");

        /* swallow the 'var' token... */
        token = json_scanner_get_next_token (scanner);

        /* ... swallow the variable name... */
        next_token = json_scanner_get_next_token (scanner);
        if (next_token != G_TOKEN_IDENTIFIER)
          {
            priv->error_code = JSON_PARSER_ERROR_INVALID_BAREWORD;
            return G_TOKEN_IDENTIFIER;
          }

        name = g_strdup (scanner->value.v_identifier);

        /* ... and finally swallow the '=' */
        next_token = json_scanner_get_next_token (scanner);
        if (next_token != '=')
          {
            priv->error_code = JSON_PARSER_ERROR_INVALID_BAREWORD;
            g_free (name);
            return '=';
          }

        priv->has_assignment = TRUE;
        priv->variable_name = name;

        token = json_parse_statement (parser, scanner);

        /* remove the trailing semi-colon */
        next_token = json_scanner_peek_next_token (scanner);
        if (next_token == ';')
          {
            token = json_scanner_get_next_token (scanner);
            return G_TOKEN_NONE;
          }

        return token;
      }
      break;

    case JSON_TOKEN_NULL:
    case JSON_TOKEN_TRUE:
    case JSON_TOKEN_FALSE:
    case '-':
    case G_TOKEN_INT:
    case G_TOKEN_FLOAT:
    case G_TOKEN_STRING:
    case G_TOKEN_IDENTIFIER:
      JSON_NOTE (PARSER, "Statement is a value");
      token = json_scanner_get_next_token (scanner);
      return json_parse_value (parser, scanner, token, &priv->root);

    default:
      JSON_NOTE (PARSER, "Unknown statement");
      json_scanner_get_next_token (scanner);
      priv->error_code = JSON_PARSER_ERROR_INVALID_BAREWORD;
      return G_TOKEN_SYMBOL;
    }
}
예제 #5
0
static guint
json_parse_object (JsonParser   *parser,
                   JsonScanner  *scanner,
                   JsonNode    **node)
{
  JsonParserPrivate *priv = parser->priv;
  JsonObject *object;
  JsonNode *old_current;
  guint token;

  old_current = priv->current_node;
  priv->current_node = json_node_init_object (json_node_alloc (), NULL);

  object = json_object_new ();

  token = json_scanner_get_next_token (scanner);
  g_assert (token == G_TOKEN_LEFT_CURLY);

  g_signal_emit (parser, parser_signals[OBJECT_START], 0);

  while (token != G_TOKEN_RIGHT_CURLY)
    {
      guint next_token = json_scanner_peek_next_token (scanner);
      JsonNode *member = NULL;
      gchar *name;

      /* we need to abort here because empty objects do not
       * have member names
       */
      if (next_token == G_TOKEN_RIGHT_CURLY)
        break;

      /* parse the member's name */
      if (next_token != G_TOKEN_STRING)
        {
          JSON_NOTE (PARSER, "Missing object member name");

          priv->error_code = JSON_PARSER_ERROR_INVALID_BAREWORD;

          json_object_unref (object);
          json_node_free (priv->current_node);
          priv->current_node = old_current;

          return G_TOKEN_STRING;
        }

      /* member name */
      token = json_scanner_get_next_token (scanner);
      name = g_strdup (scanner->value.v_string);
      if (name == NULL || *name == '\0')
        {
          JSON_NOTE (PARSER, "Empty object member name");

          priv->error_code = JSON_PARSER_ERROR_EMPTY_MEMBER_NAME;

          json_object_unref (object);
          json_node_free (priv->current_node);
          priv->current_node = old_current;

          return G_TOKEN_STRING;
        }

      JSON_NOTE (PARSER, "Object member '%s'", name);

      /* a colon separates names from values */
      next_token = json_scanner_peek_next_token (scanner);
      if (next_token != ':')
        {
          JSON_NOTE (PARSER, "Missing object member name separator");

          priv->error_code = JSON_PARSER_ERROR_MISSING_COLON;

          g_free (name);
          json_object_unref (object);
          json_node_free (priv->current_node);
          priv->current_node = old_current;

          return ':';
        }

      /* we swallow the ':' */
      token = json_scanner_get_next_token (scanner);
      g_assert (token == ':');
      next_token = json_scanner_peek_next_token (scanner);

      /* parse the member's value */
      switch (next_token)
        {
        case G_TOKEN_LEFT_BRACE:
          JSON_NOTE (PARSER, "Nested array at member %s", name);
          token = json_parse_array (parser, scanner, &member);
          break;

        case G_TOKEN_LEFT_CURLY:
          JSON_NOTE (PARSER, "Nested object at member %s", name);
          token = json_parse_object (parser, scanner, &member);
          break;

        default:
          /* once a member name is defined we need a value */
          token = json_scanner_get_next_token (scanner);
          token = json_parse_value (parser, scanner, token, &member);
          break;
        }

      if (token != G_TOKEN_NONE || member == NULL)
        {
          /* the json_parse_* functions will have set the error code */
          g_free (name);
          json_object_unref (object);
          json_node_free (priv->current_node);
          priv->current_node = old_current;

          return token;
        }

      next_token = json_scanner_peek_next_token (scanner);
      if (next_token == G_TOKEN_COMMA)
        {
          token = json_scanner_get_next_token (scanner);
          next_token = json_scanner_peek_next_token (scanner);

          /* look for trailing commas */
          if (next_token == G_TOKEN_RIGHT_CURLY)
            {
              priv->error_code = JSON_PARSER_ERROR_TRAILING_COMMA;

              json_object_unref (object);
              json_node_free (member);
              json_node_free (priv->current_node);
              priv->current_node = old_current;

              return G_TOKEN_RIGHT_BRACE;
            }
        }
      else if (next_token == G_TOKEN_STRING)
        {
          priv->error_code = JSON_PARSER_ERROR_MISSING_COMMA;

          json_object_unref (object);
          json_node_free (member);
          json_node_free (priv->current_node);
          priv->current_node = old_current;

          return G_TOKEN_COMMA;
        }

      JSON_NOTE (PARSER, "Object member '%s' completed", name);
      json_node_set_parent (member, priv->current_node);
      json_object_set_member (object, name, member);

      g_signal_emit (parser, parser_signals[OBJECT_MEMBER], 0,
                     object,
                     name);

      g_free (name);

      token = next_token;
    }

  json_scanner_get_next_token (scanner);

  json_node_take_object (priv->current_node, object);
  json_node_set_parent (priv->current_node, old_current);

  g_signal_emit (parser, parser_signals[OBJECT_END], 0, object);

  if (node != NULL && *node == NULL)
    *node = priv->current_node;

  priv->current_node = old_current;

  return G_TOKEN_NONE;
}
예제 #6
0
static guint
json_parse_array (JsonParser   *parser,
                  JsonScanner  *scanner,
                  JsonNode    **node)
{
  JsonParserPrivate *priv = parser->priv;
  JsonNode *old_current;
  JsonArray *array;
  guint token;
  gint idx;

  old_current = priv->current_node;
  priv->current_node = json_node_init_array (json_node_alloc (), NULL);

  array = json_array_new ();

  token = json_scanner_get_next_token (scanner);
  g_assert (token == G_TOKEN_LEFT_BRACE);

  g_signal_emit (parser, parser_signals[ARRAY_START], 0);

  idx = 0;
  while (token != G_TOKEN_RIGHT_BRACE)
    {
      guint next_token = json_scanner_peek_next_token (scanner);
      JsonNode *element = NULL;

      /* parse the element */
      switch (next_token)
        {
        case G_TOKEN_LEFT_BRACE:
          JSON_NOTE (PARSER, "Nested array at index %d", idx);
          token = json_parse_array (parser, scanner, &element);
          break;

        case G_TOKEN_LEFT_CURLY:
          JSON_NOTE (PARSER, "Nested object at index %d", idx);
          token = json_parse_object (parser, scanner, &element);
          break;

        case G_TOKEN_RIGHT_BRACE:
          goto array_done;

        default:
          token = json_scanner_get_next_token (scanner);
          token = json_parse_value (parser, scanner, token, &element);
          break;
        }

      if (token != G_TOKEN_NONE || element == NULL)
        {
          /* the json_parse_* functions will have set the error code */
          json_array_unref (array);
          json_node_free (priv->current_node);
          priv->current_node = old_current;

          return token;
        }

      next_token = json_scanner_peek_next_token (scanner);

      if (next_token == G_TOKEN_COMMA)
        {
          token = json_scanner_get_next_token (scanner);
          next_token = json_scanner_peek_next_token (scanner);

          /* look for trailing commas */
          if (next_token == G_TOKEN_RIGHT_BRACE)
            {
              priv->error_code = JSON_PARSER_ERROR_TRAILING_COMMA;

              json_array_unref (array);
              json_node_free (priv->current_node);
              json_node_free (element);
              priv->current_node = old_current;

              return G_TOKEN_RIGHT_BRACE;
            }
        }

      JSON_NOTE (PARSER, "Array element %d completed", idx + 1);
      json_node_set_parent (element, priv->current_node);
      json_array_add_element (array, element);

      g_signal_emit (parser, parser_signals[ARRAY_ELEMENT], 0,
                     array,
                     idx);

      token = next_token;
    }

array_done:
  json_scanner_get_next_token (scanner);

  json_node_take_array (priv->current_node, array);
  json_node_set_parent (priv->current_node, old_current);

  g_signal_emit (parser, parser_signals[ARRAY_END], 0, array);

  if (node != NULL && *node == NULL)
    *node = priv->current_node;

  priv->current_node = old_current;

  return G_TOKEN_NONE;
}
예제 #7
0
static guint
json_parse_value (JsonParser   *parser,
                  JsonScanner  *scanner,
                  guint         token,
                  JsonNode    **node)
{
  JsonParserPrivate *priv = parser->priv;
  JsonNode *current_node = priv->current_node;
  gboolean is_negative = FALSE;

  if (token == '-')
    {
      guint next_token = json_scanner_peek_next_token (scanner);

      if (next_token == G_TOKEN_INT ||
          next_token == G_TOKEN_FLOAT)
        {
           is_negative = TRUE;
           token = json_scanner_get_next_token (scanner);
        }
      else
        return G_TOKEN_INT;
    }

  switch (token)
    {
    case G_TOKEN_INT:
      JSON_NOTE (PARSER, "abs(node): %" G_GINT64_FORMAT " (sign: %s)",
                 scanner->value.v_int64,
                 is_negative ? "negative" : "positive");
      *node = json_node_init_int (json_node_alloc (),
                                  is_negative ? scanner->value.v_int64 * -1
                                              : scanner->value.v_int64);
      break;

    case G_TOKEN_FLOAT:
      JSON_NOTE (PARSER, "abs(node): %.6f (sign: %s)",
                 scanner->value.v_float,
                 is_negative ? "negative" : "positive");
      *node = json_node_init_double (json_node_alloc (),
                                     is_negative ? scanner->value.v_float * -1.0
                                                 : scanner->value.v_float);
      break;

    case G_TOKEN_STRING:
      JSON_NOTE (PARSER, "node: '%s'",
                 scanner->value.v_string);
      *node = json_node_init_string (json_node_alloc (), scanner->value.v_string);
      break;

    case JSON_TOKEN_TRUE:
    case JSON_TOKEN_FALSE:
      JSON_NOTE (PARSER, "node: '%s'",
                 JSON_TOKEN_TRUE ? "<true>" : "<false>");
      *node = json_node_init_boolean (json_node_alloc (), token == JSON_TOKEN_TRUE ? TRUE : FALSE);
      break;

    case JSON_TOKEN_NULL:
      JSON_NOTE (PARSER, "node: <null>");
      *node = json_node_init_null (json_node_alloc ());
      break;

    case G_TOKEN_IDENTIFIER:
      JSON_NOTE (PARSER, "node: identifier '%s'", scanner->value.v_identifier);
      priv->error_code = JSON_PARSER_ERROR_INVALID_BAREWORD;
      *node = NULL;
      return G_TOKEN_SYMBOL;

    default:
      {
        JsonNodeType cur_type;

        *node = NULL;

        JSON_NOTE (PARSER, "node: invalid token");

        cur_type = json_node_get_node_type (current_node);
        if (cur_type == JSON_NODE_ARRAY)
          {
            priv->error_code = JSON_PARSER_ERROR_PARSE;
            return G_TOKEN_RIGHT_BRACE;
          }
        else if (cur_type == JSON_NODE_OBJECT)
          {
            priv->error_code = JSON_PARSER_ERROR_PARSE;
            return G_TOKEN_RIGHT_CURLY;
          }
        else
          {
            priv->error_code = JSON_PARSER_ERROR_INVALID_BAREWORD;
            return G_TOKEN_SYMBOL;
          }
      }
      break;
    }

  return G_TOKEN_NONE;
}