public static async Task <FileSystemStorageItemBase> OpenAsync(string Path)
{
if (System.IO.Path.GetPathRoot(Path) != Path && WIN_Native_API.GetStorageItem(Path) is FileSystemStorageItemBase Item)
{
return(Item);
}
else
{
LogTracer.Log($"Native API could not found the path: \"{Path}\", fall back to UWP storage API");
try
{
string DirectoryPath = System.IO.Path.GetDirectoryName(Path);
if (string.IsNullOrEmpty(DirectoryPath))
{
StorageFolder Folder = await StorageFolder.GetFolderFromPathAsync(Path);
return(await FileSystemStorageFolder.CreateFromExistingStorageItem(Folder));
}
else
{
StorageFolder ParentFolder = await StorageFolder.GetFolderFromPathAsync(DirectoryPath);
switch (await ParentFolder.TryGetItemAsync(System.IO.Path.GetFileName(Path)))
{
case StorageFolder Folder:
{
return(await FileSystemStorageFolder.CreateFromExistingStorageItem(Folder));
}
case StorageFile File:
{
return(await FileSystemStorageFile.CreateFromExistingStorageItem(File));
}
default:
{
LogTracer.Log($"UWP storage API could not found the path: \"{Path}\"");
return(null);
}
}
}
}
catch (Exception ex)
{
LogTracer.Log(ex, $"UWP storage API could not found the path: \"{Path}\"");
return(null);
}
}
}
public static async Task ExtractGZipAsync(FileSystemStorageFolder NewFolder, FileSystemStorageFile Item, ProgressChangedEventHandler ProgressHandler = null)
{
if (await FileSystemStorageItemBase.CreateAsync(Path.Combine(NewFolder.Path, Path.GetFileNameWithoutExtension(Item.Name)), StorageItemTypes.File, CreateOption.GenerateUniqueName).ConfigureAwait(false) is FileSystemStorageFile NewFile)
{
using (FileStream SourceFileStream = await Item.GetFileStreamFromFileAsync(AccessMode.Exclusive).ConfigureAwait(false))
using (FileStream NewFileStrem = await NewFile.GetFileStreamFromFileAsync(AccessMode.Write))
using (GZipInputStream GZipStream = new GZipInputStream(SourceFileStream))
{
await GZipStream.CopyToAsync(NewFileStrem, ProgressHandler).ConfigureAwait(false);
}
}
else
{
throw new UnauthorizedAccessException();
}
}
public override async IAsyncEnumerable <FileSystemStorageItemBase> SearchAsync(string SearchWord, bool SearchInSubFolders = false, bool IncludeHiddenItem = false, bool IncludeSystemItem = false, bool IsRegexExpresstion = false, bool IgnoreCase = true, [EnumeratorCancellation] CancellationToken CancelToken = default)
{
foreach (DriveDataBase Drive in CommonAccessCollection.DriveList)
{
if (WIN_Native_API.CheckLocationAvailability(Drive.Path))
{
foreach (FileSystemStorageItemBase Item in await Task.Factory.StartNew(() => WIN_Native_API.Search(Drive.Path, SearchWord, SearchInSubFolders, IncludeHiddenItem, IncludeSystemItem, IsRegexExpresstion, IgnoreCase, CancelToken), TaskCreationOptions.LongRunning))
{
yield return(Item);
}
}
else
{
if (Drive.DriveFolder != null)
{
QueryOptions Options = new QueryOptions
{
FolderDepth = FolderDepth.Shallow,
IndexerOption = IndexerOption.DoNotUseIndexer
};
Options.SetThumbnailPrefetch(ThumbnailMode.ListView, 150, ThumbnailOptions.UseCurrentScale);
Options.SetPropertyPrefetch(PropertyPrefetchOptions.BasicProperties, new string[] { "System.FileName", "System.Size", "System.DateModified", "System.DateCreated" });
StorageItemQueryResult Query = Drive.DriveFolder.CreateItemQueryWithOptions(Options);
for (uint Index = 0; !CancelToken.IsCancellationRequested; Index += 50)
{
IReadOnlyList <IStorageItem> ReadOnlyItemList = await Query.GetItemsAsync(Index, 50).AsTask(CancelToken);
if (ReadOnlyItemList.Count > 0)
{
foreach (IStorageItem Item in IsRegexExpresstion
? ReadOnlyItemList.AsParallel().Where((Item) => Regex.IsMatch(Item.Name, SearchWord, IgnoreCase ? RegexOptions.IgnoreCase : RegexOptions.None))
: ReadOnlyItemList.AsParallel().Where((Item) => Item.Name.Contains(SearchWord, IgnoreCase ? StringComparison.OrdinalIgnoreCase : StringComparison.Ordinal)))
{
if (CancelToken.IsCancellationRequested)
{
yield break;
}
switch (Item)
{
case StorageFolder SubFolder:
{
yield return(await CreatedByStorageItemAsync(SubFolder));
break;
}
case StorageFile SubFile:
{
yield return(await CreatedByStorageItemAsync(SubFile));
break;
}
}
}
if (SearchInSubFolders)
{
foreach (StorageFolder Item in ReadOnlyItemList.OfType <StorageFolder>())
{
if (CancelToken.IsCancellationRequested)
{
yield break;
}
FileSystemStorageFolder FSubFolder = await CreatedByStorageItemAsync(Item);
await foreach (FileSystemStorageItemBase FSubItem in FSubFolder.SearchAsync(SearchWord, SearchInSubFolders, IncludeHiddenItem, IncludeSystemItem, IsRegexExpresstion, IgnoreCase, CancelToken))
{
if (CancelToken.IsCancellationRequested)
{
yield break;
}
yield return(FSubItem);
}
}
}
}
else
{
break;
}
}
}
}
}
}
public virtual Task CopyAsync(FileSystemStorageFolder Directory, ProgressChangedEventHandler ProgressHandler = null)
{
return(CopyAsync(Directory.Path, ProgressHandler));
}
private DriveChangeDeferredEventArgs(FileSystemStorageFolder StorageItem)
{
this.StorageItem = StorageItem;
}
private static async Task TarFolderCore(FileSystemStorageFolder Folder, TarOutputStream OutputStream, string BaseFolderName, ByteReadChangedEventHandler ByteReadHandler = null)
{
IReadOnlyList <FileSystemStorageItemBase> ItemList = await Folder.GetChildItemsAsync(true, true).ConfigureAwait(false);
if (ItemList.Count == 0)
{
if (!string.IsNullOrEmpty(BaseFolderName))
{
TarEntry NewEntry = TarEntry.CreateTarEntry($"{BaseFolderName}/");
OutputStream.PutNextEntry(NewEntry);
OutputStream.CloseEntry();
}
}
else
{
ulong CurrentPosition = 0;
foreach (FileSystemStorageItemBase Item in ItemList)
{
switch (Item)
{
case FileSystemStorageFolder InnerFolder:
{
ulong InnerFolderSize = 0;
await TarFolderCore(InnerFolder, OutputStream, $"{BaseFolderName}/{InnerFolder.Name}", ByteReadHandler : (ByteRead) =>
{
InnerFolderSize = ByteRead;
ByteReadHandler?.Invoke(CurrentPosition + ByteRead);
}).ConfigureAwait(false);
ByteReadHandler?.Invoke(CurrentPosition += InnerFolderSize);
break;
}
case FileSystemStorageFile InnerFile:
{
using (FileStream FileStream = await InnerFile.GetFileStreamFromFileAsync(AccessMode.Read).ConfigureAwait(false))
{
TarEntry NewEntry = TarEntry.CreateTarEntry($"{BaseFolderName}/{InnerFile.Name}");
NewEntry.ModTime = DateTime.Now;
NewEntry.Size = FileStream.Length;
OutputStream.PutNextEntry(NewEntry);
await FileStream.CopyToAsync(OutputStream, ProgressHandler : (s, e) =>
{
ByteReadHandler?.Invoke(CurrentPosition + Convert.ToUInt64(e.ProgressPercentage / 100d * InnerFile.SizeRaw));
}).ConfigureAwait(false);
}
OutputStream.CloseEntry();
ByteReadHandler?.Invoke(CurrentPosition += InnerFile.SizeRaw);
break;
}
}
}
}
}
private static async Task ZipFolderCore(FileSystemStorageFolder Folder, ZipOutputStream OutputStream, string BaseFolderName, CompressionAlgorithm Algorithm, ByteReadChangedEventHandler ByteReadHandler = null)
{
IReadOnlyList <FileSystemStorageItemBase> ItemList = await Folder.GetChildItemsAsync(true, true).ConfigureAwait(false);
if (ItemList.Count == 0)
{
if (!string.IsNullOrEmpty(BaseFolderName))
{
ZipEntry NewEntry = new ZipEntry($"{BaseFolderName}/")
{
DateTime = DateTime.Now
};
OutputStream.PutNextEntry(NewEntry);
OutputStream.CloseEntry();
}
}
else
{
ulong CurrentPosition = 0;
foreach (FileSystemStorageItemBase Item in ItemList)
{
switch (Item)
{
case FileSystemStorageFolder InnerFolder:
{
ulong InnerFolderSize = 0;
await ZipFolderCore(InnerFolder, OutputStream, $"{BaseFolderName}/{Item.Name}", Algorithm, (ByteRead) =>
{
InnerFolderSize = ByteRead;
ByteReadHandler?.Invoke(CurrentPosition + ByteRead);
}).ConfigureAwait(false);
ByteReadHandler?.Invoke(CurrentPosition += InnerFolderSize);
break;
}
case FileSystemStorageFile InnerFile:
{
using (FileStream FileStream = await InnerFile.GetFileStreamFromFileAsync(AccessMode.Read).ConfigureAwait(false))
{
ZipEntry NewEntry = new ZipEntry($"{BaseFolderName}/{Item.Name}")
{
DateTime = DateTime.Now,
CompressionMethod = Algorithm == CompressionAlgorithm.None ? CompressionMethod.Stored : Enum.Parse <CompressionMethod>(Enum.GetName(typeof(CompressionAlgorithm), Algorithm)),
Size = FileStream.Length
};
OutputStream.PutNextEntry(NewEntry);
await FileStream.CopyToAsync(OutputStream, ProgressHandler : (s, e) =>
{
ByteReadHandler?.Invoke(CurrentPosition + Convert.ToUInt64(e.ProgressPercentage / 100d * InnerFile.SizeRaw));
}).ConfigureAwait(false);
}
OutputStream.CloseEntry();
ByteReadHandler?.Invoke(CurrentPosition += Item.SizeRaw);
break;
}
}
}
}
}
public virtual Task CopyAsync(FileSystemStorageFolder Directory, CollisionOptions Option = CollisionOptions.None, ProgressChangedEventHandler ProgressHandler = null)
{
return(CopyAsync(Directory.Path, Option, ProgressHandler));
}
public virtual Task CopyAsync(FileSystemStorageFolder Directory, ProgressChangedEventHandler ProgressHandler = null, bool IsUndoOperation = false)
{
return(CopyAsync(Directory.Path, ProgressHandler, IsUndoOperation));
}
public static async Task ExtractTarAsync(FileSystemStorageFolder NewFolder, FileSystemStorageFile File, ProgressChangedEventHandler ProgressHandler = null)
{
using (FileStream BaseStream = await File.GetFileStreamFromFileAsync(AccessMode.Exclusive).ConfigureAwait(false))
using (TarInputStream InputTarStream = new TarInputStream(BaseStream, Encoding.UTF8))
{
BaseStream.Seek(0, SeekOrigin.Begin);
InputTarStream.IsStreamOwner = false;
long CurrentPosition = 0;
while (InputTarStream.GetNextEntry() is TarEntry Entry)
{
if (Entry.Name.Contains("/"))
{
string[] SplitFolderPath = Entry.Name.Split('/', StringSplitOptions.RemoveEmptyEntries);
string TempFolderPath = NewFolder.Path;
for (int i = 0; i < SplitFolderPath.Length - 1; i++)
{
if (await FileSystemStorageItemBase.CreateAsync(Path.Combine(TempFolderPath, SplitFolderPath[i]), StorageItemTypes.Folder, CreateOption.OpenIfExist).ConfigureAwait(false) is FileSystemStorageFolder NextFolder)
{
TempFolderPath = NextFolder.Path;
}
else
{
throw new UnauthorizedAccessException("Could not create directory");
}
}
if (Entry.Name.Last() == '/')
{
if (await FileSystemStorageItemBase.CreateAsync(Path.Combine(TempFolderPath, SplitFolderPath.Last()), StorageItemTypes.Folder, CreateOption.OpenIfExist).ConfigureAwait(false) == null)
{
throw new UnauthorizedAccessException("Could not create directory");
}
}
else
{
if (await FileSystemStorageItemBase.CreateAsync(Path.Combine(TempFolderPath, SplitFolderPath.Last()), StorageItemTypes.File, CreateOption.GenerateUniqueName).ConfigureAwait(false) is FileSystemStorageFile NewFile)
{
using (FileStream NewFileStream = await NewFile.GetFileStreamFromFileAsync(AccessMode.Write).ConfigureAwait(false))
{
if (Entry.Size > 0)
{
await InputTarStream.CopyToAsync(NewFileStream, (s, e) =>
{
ProgressHandler?.Invoke(null, new ProgressChangedEventArgs(Convert.ToInt32((CurrentPosition + Convert.ToInt64(e.ProgressPercentage / 100d * Entry.Size)) * 100d / BaseStream.Length), null));
}).ConfigureAwait(false);
}
else
{
await InputTarStream.CopyToAsync(NewFileStream).ConfigureAwait(false);
}
}
}
else
{
throw new UnauthorizedAccessException();
}
}
}
else
{
if (await FileSystemStorageItemBase.CreateAsync(Path.Combine(NewFolder.Path, Entry.Name), StorageItemTypes.File, CreateOption.GenerateUniqueName).ConfigureAwait(false) is FileSystemStorageFile NewFile)
{
using (FileStream NewFileStream = await NewFile.GetFileStreamFromFileAsync(AccessMode.Write).ConfigureAwait(false))
{
if (Entry.Size > 0)
{
await InputTarStream.CopyToAsync(NewFileStream, (s, e) =>
{
ProgressHandler?.Invoke(null, new ProgressChangedEventArgs(Convert.ToInt32((CurrentPosition + Convert.ToInt64(e.ProgressPercentage / 100d * Entry.Size)) * 100d / BaseStream.Length), null));
}).ConfigureAwait(false);
}
else
{
await InputTarStream.CopyToAsync(NewFileStream).ConfigureAwait(false);
}
}
}
else
{
throw new UnauthorizedAccessException();
}
}
ProgressHandler?.Invoke(null, new ProgressChangedEventArgs(Convert.ToInt32((CurrentPosition = BaseStream.Position) * 100d / BaseStream.Length), null));
}
}
}
private static async Task ZipFolderCore(FileSystemStorageFolder Folder, ZipOutputStream OutputStream, string BaseFolderName, ProgressChangedEventHandler ProgressHandler = null)
{
List <FileSystemStorageItemBase> ItemList = await Folder.GetChildItemsAsync(true).ConfigureAwait(false);
if (ItemList.Count == 0)
{
if (!string.IsNullOrEmpty(BaseFolderName))
{
ZipEntry NewEntry = new ZipEntry($"{BaseFolderName}/");
OutputStream.PutNextEntry(NewEntry);
OutputStream.CloseEntry();
}
}
else
{
ulong TotalSize = await Folder.GetFolderSizeAsync().ConfigureAwait(false);
ulong CurrentPosition = 0;
foreach (FileSystemStorageItemBase Item in ItemList)
{
switch (Item)
{
case FileSystemStorageFolder InnerFolder:
{
ulong InnerFolderSize = await InnerFolder.GetFolderSizeAsync().ConfigureAwait(false);
await ZipFolderCore(InnerFolder, OutputStream, $"{BaseFolderName}/{Item.Name}", ProgressHandler : (s, e) =>
{
if (TotalSize > 0)
{
ProgressHandler?.Invoke(null, new ProgressChangedEventArgs(Convert.ToInt32((CurrentPosition + Convert.ToUInt64(e.ProgressPercentage / 100d * InnerFolderSize)) * 100d / TotalSize), null));
}
}).ConfigureAwait(false);
if (TotalSize > 0)
{
CurrentPosition += InnerFolderSize;
ProgressHandler?.Invoke(null, new ProgressChangedEventArgs(Convert.ToInt32(CurrentPosition * 100d / TotalSize), null));
}
break;
}
case FileSystemStorageFile InnerFile:
{
using (FileStream FileStream = await InnerFile.GetFileStreamFromFileAsync(AccessMode.Read).ConfigureAwait(false))
{
ZipEntry NewEntry = new ZipEntry($"{BaseFolderName}/{Item.Name}")
{
DateTime = DateTime.Now,
CompressionMethod = CompressionMethod.Deflated,
Size = FileStream.Length
};
OutputStream.PutNextEntry(NewEntry);
await FileStream.CopyToAsync(OutputStream, (s, e) =>
{
ProgressHandler?.Invoke(null, new ProgressChangedEventArgs(Convert.ToInt32((CurrentPosition + Convert.ToUInt64(e.ProgressPercentage / 100d * InnerFile.SizeRaw)) * 100d / TotalSize), null));
}).ConfigureAwait(false);
}
if (TotalSize > 0)
{
CurrentPosition += Item.SizeRaw;
ProgressHandler?.Invoke(null, new ProgressChangedEventArgs(Convert.ToInt32(CurrentPosition * 100d / TotalSize), null));
}
break;
}
}
}
}
}
public static async Task <FileSystemStorageItemBase> CreateAsync(string Path, StorageItemTypes ItemTypes, CreateOption Option)
{
switch (ItemTypes)
{
case StorageItemTypes.File:
{
if (WIN_Native_API.CreateFileFromPath(Path, Option, out string NewPath))
{
return(await OpenAsync(NewPath));
}
else
{
LogTracer.Log($"Native API could not create file: \"{Path}\", fall back to UWP storage API");
try
{
StorageFolder Folder = await StorageFolder.GetFolderFromPathAsync(System.IO.Path.GetDirectoryName(Path));
switch (Option)
{
case CreateOption.GenerateUniqueName:
{
StorageFile NewFile = await Folder.CreateFileAsync(System.IO.Path.GetFileName(Path), CreationCollisionOption.GenerateUniqueName);
return(await FileSystemStorageFile.CreateFromExistingStorageItem(NewFile));
}
case CreateOption.OpenIfExist:
{
StorageFile NewFile = await Folder.CreateFileAsync(System.IO.Path.GetFileName(Path), CreationCollisionOption.OpenIfExists);
return(await FileSystemStorageFile.CreateFromExistingStorageItem(NewFile));
}
case CreateOption.ReplaceExisting:
{
StorageFile NewFile = await Folder.CreateFileAsync(System.IO.Path.GetFileName(Path), CreationCollisionOption.ReplaceExisting);
return(await FileSystemStorageFile.CreateFromExistingStorageItem(NewFile));
}
default:
{
return(null);
}
}
}
catch
{
LogTracer.Log($"UWP storage API could not create file: \"{Path}\"");
return(null);
}
}
}
case StorageItemTypes.Folder:
{
if (WIN_Native_API.CreateDirectoryFromPath(Path, Option, out string NewPath))
{
return(await OpenAsync(NewPath));
}
else
{
LogTracer.Log($"Native API could not create file: \"{Path}\", fall back to UWP storage API");
try
{
StorageFolder Folder = await StorageFolder.GetFolderFromPathAsync(System.IO.Path.GetDirectoryName(Path));
switch (Option)
{
case CreateOption.GenerateUniqueName:
{
StorageFolder NewFolder = await Folder.CreateFolderAsync(System.IO.Path.GetFileName(Path), CreationCollisionOption.GenerateUniqueName);
return(await FileSystemStorageFolder.CreateFromExistingStorageItem(NewFolder));
}
case CreateOption.OpenIfExist:
{
StorageFolder NewFolder = await Folder.CreateFolderAsync(System.IO.Path.GetFileName(Path), CreationCollisionOption.OpenIfExists);
return(await FileSystemStorageFolder.CreateFromExistingStorageItem(NewFolder));
}
case CreateOption.ReplaceExisting:
{
StorageFolder NewFolder = await Folder.CreateFolderAsync(System.IO.Path.GetFileName(Path), CreationCollisionOption.ReplaceExisting);
return(await FileSystemStorageFolder.CreateFromExistingStorageItem(NewFolder));
}
default:
{
return(null);
}
}
}
catch
{
LogTracer.Log($"UWP storage API could not create folder: \"{Path}\"");
return(null);
}
}
}
default:
{
return(null);
}
}
}
/// <summary>
/// 执行ZIP解压功能
/// </summary>
/// <param name="File">ZIP文件</param>
/// <returns>无</returns>
public static async Task ExtractZipAsync(FileSystemStorageFolder NewFolder, FileSystemStorageFile File, ProgressChangedEventHandler ProgressHandler = null)
{
ZipStrings.CodePage = EncodingSetting.CodePage;
using (FileStream BaseStream = await File.GetFileStreamFromFileAsync(AccessMode.Exclusive).ConfigureAwait(false))
using (ZipInputStream InputZipStream = new ZipInputStream(BaseStream))
{
BaseStream.Seek(0, SeekOrigin.Begin);
InputZipStream.IsStreamOwner = false;
long CurrentPosition = 0;
while (InputZipStream.GetNextEntry() is ZipEntry Entry)
{
if (!InputZipStream.CanDecompressEntry || Entry.IsCrypted)
{
throw new NotImplementedException();
}
if (Entry.Name.Contains("/"))
{
string[] SplitFolderPath = Entry.Name.Split('/', StringSplitOptions.RemoveEmptyEntries);
string TempFolderPath = NewFolder.Path;
for (int i = 0; i < SplitFolderPath.Length - 1; i++)
{
if (await FileSystemStorageItemBase.CreateAsync(Path.Combine(TempFolderPath, SplitFolderPath[i]), StorageItemTypes.Folder, CreateOption.OpenIfExist).ConfigureAwait(false) is FileSystemStorageFolder NextFolder)
{
TempFolderPath = NextFolder.Path;
}
else
{
throw new UnauthorizedAccessException("Could not create directory");
}
}
if (Entry.Name.Last() == '/')
{
if (await FileSystemStorageItemBase.CreateAsync(Path.Combine(TempFolderPath, SplitFolderPath.Last()), StorageItemTypes.Folder, CreateOption.OpenIfExist).ConfigureAwait(false) == null)
{
throw new UnauthorizedAccessException("Could not create directory");
}
}
else
{
if (await FileSystemStorageItemBase.CreateAsync(Path.Combine(TempFolderPath, SplitFolderPath.Last()), StorageItemTypes.File, CreateOption.GenerateUniqueName).ConfigureAwait(false) is FileSystemStorageFile NewFile)
{
using (FileStream NewFileStream = await NewFile.GetFileStreamFromFileAsync(AccessMode.Write).ConfigureAwait(false))
{
//For some files in Zip, CompressedSize or Size might less than zero, then we could not get progress by reading ZipInputStream.Length
if (Entry.CompressedSize > 0 && Entry.Size > 0)
{
await InputZipStream.CopyToAsync(NewFileStream, (s, e) =>
{
ProgressHandler?.Invoke(null, new ProgressChangedEventArgs(Convert.ToInt32((CurrentPosition + Convert.ToInt64(e.ProgressPercentage / 100d * Entry.CompressedSize)) * 100d / BaseStream.Length), null));
}).ConfigureAwait(false);
}
else
{
await InputZipStream.CopyToAsync(NewFileStream).ConfigureAwait(false);
}
}
}
else
{
throw new UnauthorizedAccessException();
}
}
}
else
{
if (await FileSystemStorageItemBase.CreateAsync(Path.Combine(NewFolder.Path, Entry.Name), StorageItemTypes.File, CreateOption.GenerateUniqueName).ConfigureAwait(false) is FileSystemStorageFile NewFile)
{
using (FileStream NewFileStream = await NewFile.GetFileStreamFromFileAsync(AccessMode.Write).ConfigureAwait(false))
{
//For some files in Zip, CompressedSize or Size might less than zero, then we could not get progress by reading ZipInputStream.Length
if (Entry.CompressedSize > 0 && Entry.Size > 0)
{
await InputZipStream.CopyToAsync(NewFileStream, (s, e) =>
{
ProgressHandler?.Invoke(null, new ProgressChangedEventArgs(Convert.ToInt32((CurrentPosition + Convert.ToInt64(e.ProgressPercentage / 100d * Entry.CompressedSize)) * 100d / BaseStream.Length), null));
}).ConfigureAwait(true);
}
else
{
await InputZipStream.CopyToAsync(NewFileStream).ConfigureAwait(false);
}
}
}
else
{
throw new UnauthorizedAccessException();
}
}
ProgressHandler?.Invoke(null, new ProgressChangedEventArgs(Convert.ToInt32((CurrentPosition = BaseStream.Position) * 100d / BaseStream.Length), null));
}
}
}
