CodeSnip Old Code (SVN)

Moved field that records whether database has changed from _TDatabase into TDatabase and created a temporary TDatabase.__Updated property to provide access to the new field to the code that needs it in TDatabase.
Also removed IDatabaseEdit.Updated function and its implementation in TDatabase and added a TDatabase.IsDirty method to perform same role.
Modified TDatabase.Load to clear the dirty flag.
Changed affected code to use the new TDatabase method.

Added new IDatabaseWriter interface and modified TDBNativeWriter to implement it.

Added new TDatabase.Load method that loads database using new loader classes.
Added new field to TDatabase to store last modified date of database: this is set when database is loaded.
Removed old Load method from _IDatabase and _TDatabase.
Changed affected code to use TDatabase.Load instead of IDatabase.Load.

Updated re changes to unit and class names for empty database reader at revision 4267.

Renamed CS.Database.IO.Null.pas as CS.Database.IO.Empty.pas and renamed TDBNullReader as TEmptyDBReader.
TEmptyDBReader.Load now passes out the current date instead of a null date.

Changed TDBNullReader.Load method to clear the given snippet table as happens in other database loaders.

Added new TDatabaseIOFactory.CreateLoader method that can create and return a database loader object for a database in either native format, legacy format or return a null loader if there is no database present.

New unit containing a null database loader class for use when there is no database present.

Corrected error in code that checks for correct XML processing instruction.

Removed unused parameter from IDatabaseLoader.DatabaseExists method and its implementation.