/// <summary>
/// Marks the file in the index as deleted.
/// Note only the pointer to the file is removed, the data itself remains stored in the data file (data is not purged).
/// </summary>
public void DeleteDataIdentifier(Guid dataIdentifier, DeleteFileBehaviour deleteFileBehaviour, StreamStateBehaviour indexStreamStateBehaviour)
{
switch (indexStreamStateBehaviour)
{
case StreamStateBehaviour.OpenNewStreamForReadingAndWriting:
//
// open the stream and make a recursive call
//
using (IndexStream = FileStreamFactory.CreateFileStream(IndexFilename, indexStreamStateBehaviour))
{
DeleteDataIdentifier(dataIdentifier, deleteFileBehaviour, StreamStateBehaviour.UseExistingStream);
}
break;
case StreamStateBehaviour.UseExistingStream:
switch (deleteFileBehaviour)
{
case DeleteFileBehaviour.IgnoreWhenNotExists:
break;
case DeleteFileBehaviour.ThrowExceptionWhenNotExists:
if (!Exists(dataIdentifier, StreamStateBehaviour.UseExistingStream))
{
throw new FileNotFoundException(string.Format("File does not exist ({0})", dataIdentifier));
}
break;
default:
throw new NotSupportedException(string.Format("Unsupported delete file behaviour ({0})", deleteFileBehaviour));
}
DeleteDataIdentifierInExistingStream(dataIdentifier, 0, OffsetFirstIndexBlock, indexStreamStateBehaviour);
break;
default:
throw new NotSupportedException(string.Format("Unexpected indexStreamStateBehaviour {0}", indexStreamStateBehaviour));
}
}
public static void DeleteDataIdentifier(string fileStorageName, Guid dataIdentifier, DeleteFileBehaviour deleteFileBehaviour)
{
var fileStorageHandler = FileStorageHandler.Open(fileStorageName);
fileStorageHandler.DeleteDataIdentifier(dataIdentifier, deleteFileBehaviour, StreamStateBehaviour.OpenNewStreamForReadingAndWriting);
}
public static void DeleteDataIdentifier(string fileStorageName, Guid dataIdentifier, DeleteFileBehaviour deleteFileBehaviour)
{
FileStorageHandler fileStorageHandler = FileStorageHandler.Open(fileStorageName);
fileStorageHandler.DeleteDataIdentifier(dataIdentifier, deleteFileBehaviour, StreamStateBehaviour.OpenNewStreamForReadingAndWriting);
}
