private void MigrateFreespace(IFreespaceManager oldFreespaceManager)
{
IFreespaceManager newFreespaceManager = AbstractFreespaceManager.CreateNew(this,
ConfigImpl.FreespaceSystem());
newFreespaceManager.Start(0);
SystemData().FreespaceSystem(ConfigImpl.FreespaceSystem());
InstallFreespaceManager(newFreespaceManager);
AbstractFreespaceManager.Migrate(oldFreespaceManager, newFreespaceManager);
_fileHeader.WriteVariablePart(this);
}
/// <exception cref="Db4objects.Db4o.Ext.OldFormatException"></exception>
internal virtual void ReadThis()
{
NewSystemData(AbstractFreespaceManager.FmLegacyRam, StandardIdSystemFactory.Legacy
);
BlockSizeReadFromFile(1);
_fileHeader = FileHeader.Read(this);
if (Config().GenerateCommitTimestamps().IsUnspecified())
{
Config().GenerateCommitTimestamps(_systemData.IdToTimestampIndexId() != 0);
}
CreateStringIO(_systemData.StringEncoding());
CreateIdSystem();
InitializeClassMetadataRepository();
InitalizeWeakReferenceSupport();
SetNextTimeStampId(SystemData().LastTimeStampID());
ClassCollection().SetID(_systemData.ClassCollectionID());
ClassCollection().Read(SystemTransaction());
Converter.Convert(new ConversionStage.ClassCollectionAvailableStage(this));
_fileHeader.ReadIdentity(this);
if (_config.IsReadOnly())
{
return;
}
if (!ConfigImpl.CommitRecoveryDisabled())
{
_fileHeader.CompleteInterruptedTransaction(this);
}
IFreespaceManager blockedFreespaceManager = AbstractFreespaceManager.CreateNew(this
, _systemData.FreespaceSystem());
InstallFreespaceManager(blockedFreespaceManager);
blockedFreespaceManager.Read(this, _systemData.InMemoryFreespaceSlot());
blockedFreespaceManager.Start(_systemData.BTreeFreespaceId());
_fileHeader = _fileHeader.Convert(this);
if (FreespaceMigrationRequired(blockedFreespaceManager))
{
MigrateFreespace(blockedFreespaceManager);
}
WriteHeader(true, false);
if (Converter.Convert(new ConversionStage.SystemUpStage(this)))
{
_systemData.ConverterVersion(Converter.Version);
_fileHeader.WriteVariablePart(this);
Transaction.Commit();
}
}