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);
}
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);
}
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 (¶m.value, G_PARAM_SPEC_VALUE_TYPE (pspec));
val = json_object_get_member (object, member_name);
res = json_deserialize_pspec (¶m.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 (¶m.value), g_type_name (gtype));
g_value_unset (¶m.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 (¶m->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;
}
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;
}
}
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;
}
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;
}
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;
}