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MgXmlStorageMgXmlStorage — Interface which provides saving and loading using XML structures |
MgXmlStorage; MgXmlStorageIface; GType mg_xml_storage_get_type (void); gchar* mg_xml_storage_get_xml_id (MgXmlStorage *iface); xmlNodePtr mg_xml_storage_save_to_xml (MgXmlStorage *iface, GError **error); gboolean mg_xml_storage_load_from_xml (MgXmlStorage *iface, xmlNodePtr node, GError **error);
MgXmlStorage is implemented by MgQfValue, MgServer, MgGraphItem, MgDatabase, MgQfField, MgTarget, MgDbConstraint, MgServerFunction, MgServerAggregate, MgQfAll, MgCondition, MgDbTable, MgDbField, MgQuery, MgGraph, MgJoin, MgQfFunc and MgServerDataType.
Any object which implements this interface can be streamed and restored to and from an XML file.
typedef struct { GTypeInterface g_iface; /* virtual table */ gchar *(* get_xml_id) (MgXmlStorage *iface); xmlNodePtr (* save_to_xml) (MgXmlStorage *iface, GError **error); gboolean (* load_from_xml) (MgXmlStorage *iface, xmlNodePtr node, GError **error); } MgXmlStorageIface;
gchar* mg_xml_storage_get_xml_id (MgXmlStorage *iface);
Fetch the xml id string of the object, it's up to the caller to free the string.
iface : | an object which implements the MgXmlStorage interface |
Returns : | the xml id. |
xmlNodePtr mg_xml_storage_save_to_xml (MgXmlStorage *iface, GError **error);
Creates a new xmlNodePtr structure and fills it with data representing the object given as argument.
iface : | an object which implements the MgXmlStorage interface |
error : | location to store error, or NULL |
Returns : | the new XML node, or NULL if an error occurred. |
gboolean mg_xml_storage_load_from_xml (MgXmlStorage *iface, xmlNodePtr node, GError **error);
Updates the object with data stored in the XML node. The object MUST already exist and be of the correct type before calling this function. This is a virtual function.
iface : | an object which implements the MgXmlStorage interface |
node : | an XML node from an XML structure |
error : | location to store error, or NULL |
Returns : | TRUE if no error occurred. |
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