protected override async Task <FileObject> CreateFileImplAsync(FileParameters option, CancellationToken cancel = default)
{
string fileName = this.PathParser.GetFileName(option.Path);
if (fileName.IndexOf(Params.SplitStr) != -1)
{
throw new ApplicationException($"The original filename '{fileName}' contains '{Params.SplitStr}'.");
}
await using (CreatePerTaskCancellationToken(out CancellationToken operationCancel, cancel))
{
using (await AsyncLockObj.LockWithAwait(operationCancel))
{
cancel.ThrowIfCancellationRequested();
bool isSimplePhysicalFileExists = await UnderlayFileSystem.IsFileExistsAsync(option.Path);
if (isSimplePhysicalFileExists)
{
// If there is a simple physical file, open it.
return(await UnderlayFileSystem.CreateFileAsync(option, cancel));
}
ParsedPath[] relatedFiles = await GetPhysicalFileStateInternal(option.Path, operationCancel);
return(await LargeFileObject.CreateFileAsync(this, option, relatedFiles, operationCancel));
}
}
}
protected virtual async Task <ViewFileObjectInitUnderlayFileResultParam> CreateUnderlayFileImplAsync(FileParameters option, CancellationToken cancel = default)
{
FileObject obj = await UnderlayFileSystem.CreateFileAsync(option, cancel);
try
{
ViewFileObjectInitUnderlayFileResultParam result = new ViewFileObjectInitUnderlayFileResultParam(
obj,
obj.FileParams.Flags.Bit(FileFlags.RandomAccessOnly) ? 0 : obj.Position,
obj.Size);
return(result);
}
catch
{
obj._DisposeSafe();
throw;
}
}