file_info_filter Class Reference
Implementing this class gives you direct control over which part of file_info gets altered during a tag update uperation. To be used with metadb_io_v2::update_info_async(). More...
#include <metadb.h>
Inheritance diagram for file_info_filter:
Public Types | |
| typedef file_info_filter | t_interface |
| typedef service_base | t_interface_parent |
Public Member Functions | |
| virtual bool | apply_filter (metadb_handle_ptr p_location, t_filestats p_stats, file_info &p_info)=0 |
Static Public Attributes | |
| static const GUID | class_guid = { 0x45d0b800, 0xde83, 0x4a77, { 0xad, 0x34, 0x3f, 0x84, 0x2d, 0x40, 0xe7, 0x95 } } |
Detailed Description
Implementing this class gives you direct control over which part of file_info gets altered during a tag update uperation. To be used with metadb_io_v2::update_info_async().Member Typedef Documentation
Reimplemented from service_base.
Member Function Documentation
| virtual bool file_info_filter::apply_filter | ( | metadb_handle_ptr | p_location, | |
| t_filestats | p_stats, | |||
| file_info & | p_info | |||
| ) | [pure virtual] |
Alters specified file_info entry; called as a part of tag update process. Specified file_info has been read from a file, and will be written back.
WARNING: This will be typically called from another thread than main app thread (precisely, from thread created by tag updater). You should copy all relevant data to members of your file_info_filter instance in constructor and reference only member data in apply_filter() implementation.
- Returns:
- True when you have altered file_info and changes need to be written back to the file; false if no changes have been made.
Implemented in file_info_filter_impl.
Member Data Documentation
const GUID file_info_filter::class_guid = { 0x45d0b800, 0xde83, 0x4a77, { 0xad, 0x34, 0x3f, 0x84, 0x2d, 0x40, 0xe7, 0x95 } } [static] |
The documentation for this class was generated from the following files:
