Execute C# Dokany Code Snippet -- 2

I need help to bring this chatgpt C# code snippte to run or move to a working Java-Application:

using System;
using System.Collections.Generic;
using System.IO;
using System.Security.AccessControl;
using DokanNet;
using DokanNet.Logging;
using MySql.Data.MySqlClient;
using FileAccess = DokanNet.FileAccess;

public class DokanNetTestApplication : IDokanOperations
{
private readonly string _connectionString;
private readonly ILogger _logger = new ConsoleLogger("[DokanNetTestApplication] ");

public DokanNetTestApplication(string connectionString)
{
_connectionString = connectionString;
}

private MySqlConnection GetConnection()
{
return new MySqlConnection(_connectionString);
}

// Helper to check if file exists in MySQL
private bool FileExists(string path, out VirtualFile file)
{
file = null;
using var connection = GetConnection();
connection.Open();

string query = "SELECT * FROM virtual_files WHERE path = @path LIMIT 1";
using var command = new MySqlCommand(query, connection);
command.Parameters.AddWithValue("@path", path);

using var reader = command.ExecuteReader();
if (reader.Read())
{
file = new VirtualFile
{
Id = reader.GetInt32("id"),
Filename = reader.GetString("filename"),
Path = reader.GetString("path"),
Content = (byte[])reader["content"],
Size = reader.GetInt64("size")
};
return true;
}
return false;
}

public NtStatus CreateFile(string fileName, FileAccess access, FileShare share, FileMode mode, FileOptions options, FileAttributes attributes, DokanFileInfo info)
{
_logger.Info($"CreateFile: {fileName}");

if (FileExists(fileName, out var file))
{
if (mode == FileMode.CreateNew)
return NtStatus.ObjectNameCollision;
info.IsDirectory = false;
return NtStatus.Success;
}

if (mode == FileMode.CreateNew || mode == FileMode.OpenOrCreate)
{
using var connection = GetConnection();
connection.Open();

var query = "INSERT INTO virtual_files (filename, path, content, size) VALUES (@filename, @path, @content, 0)";
using var command = new MySqlCommand(query, connection);
command.Parameters.AddWithValue("@filename", Path.GetFileName(fileName));
command.Parameters.AddWithValue("@path", fileName);
command.Parameters.AddWithValue("@content", Array.Empty<byte>());
command.ExecuteNonQuery();
return NtStatus.Success;
}

return NtStatus.ObjectNameNotFound;
}

public void Cleanup(string fileName, DokanFileInfo info)
{
_logger.Info($"Cleanup: {fileName}");
}

public void CloseFile(string fileName, DokanFileInfo info)
{
_logger.Info($"CloseFile: {fileName}");
}

public NtStatus ReadFile(string fileName, byte[] buffer, out int bytesRead, long offset, DokanFileInfo info)
{
_logger.Info($"ReadFile: {fileName}");
bytesRead = 0;
if (!FileExists(fileName, out var file))
return NtStatus.ObjectNameNotFound;

bytesRead = (int)Math.Min(buffer.Length, file.Size - offset);
Array.Copy(file.Content, offset, buffer, 0, bytesRead);
return NtStatus.Success;
}

public NtStatus WriteFile(string fileName, byte[] buffer, out int bytesWritten, long offset, DokanFileInfo info)
{
_logger.Info($"WriteFile: {fileName}");
bytesWritten = 0;
if (!FileExists(fileName, out var file))
return NtStatus.ObjectNameNotFound;

var newContentLength = Math.Max((int)(offset + buffer.Length), (int)file.Size);
var newContent = new byte[newContentLength];

Array.Copy(file.Content, newContent, file.Content.Length);
Array.Copy(buffer, 0, newContent, offset, buffer.Length);

using var connection = GetConnection();
connection.Open();
var query = "UPDATE virtual_files SET content = @content, size = @size WHERE id = @id";
using var command = new MySqlCommand(query, connection);
command.Parameters.AddWithValue("@content", newContent);
command.Parameters.AddWithValue("@size", newContent.Length);
command.Parameters.AddWithValue("@id", file.Id);

bytesWritten = buffer.Length;
return command.ExecuteNonQuery() > 0 ? NtStatus.Success : NtStatus.Unsuccessful;
}

public NtStatus GetFileInformation(string fileName, out FileInformation fileInfo, DokanFileInfo info)
{
_logger.Info($"GetFileInformation: {fileName}");
fileInfo = new FileInformation();
if (!FileExists(fileName, out var file))
return NtStatus.ObjectNameNotFound;

fileInfo = new FileInformation
{
FileName = file.Filename,
Attributes = FileAttributes.Normal,
Length = file.Size,
CreationTime = DateTime.Now,
LastAccessTime = DateTime.Now,
LastWriteTime = DateTime.Now
};
return NtStatus.Success;
}

public NtStatus FindFiles(string fileName, out IList<FileInformation> files, DokanFileInfo info)
{
_logger.Info($"FindFiles: {fileName}");
files = new List<FileInformation>();

using var connection = GetConnection();
connection.Open();
var query = "SELECT * FROM virtual_files WHERE path LIKE @pathPattern";
using var command = new MySqlCommand(query, connection);
command.Parameters.AddWithValue("@pathPattern", $"{fileName}%");

using var reader = command.ExecuteReader();
while (reader.Read())
{
files.Add(new FileInformation
{
FileName = reader.GetString("filename"),
Attributes = FileAttributes.Normal,
Length = reader.GetInt64("size"),
CreationTime = DateTime.Now,
LastAccessTime = DateTime.Now,
LastWriteTime = DateTime.Now
});
}

return NtStatus.Success;
}

public NtStatus FlushFileBuffers(string fileName, DokanFileInfo info) => NtStatus.NotImplemented;
public NtStatus FindFilesWithPattern(string fileName, string searchPattern, out IList<FileInformation> files, DokanFileInfo info)
{
files = new List<FileInformation>();
return NtStatus.NotImplemented;
}
public NtStatus SetFileAttributes(string fileName, FileAttributes attributes, DokanFileInfo info) => NtStatus.NotImplemented;
public NtStatus SetFileTime(string fileName, DateTime? creationTime, DateTime? lastAccessTime, DateTime? lastWriteTime, DokanFileInfo info) => NtStatus.NotImplemented;
public NtStatus DeleteFile(string fileName, DokanFileInfo info) => NtStatus.NotImplemented;
public NtStatus DeleteDirectory(string fileName, DokanFileInfo info) => NtStatus.NotImplemented;
public NtStatus MoveFile(string oldName, string newName, bool replace, DokanFileInfo info) => NtStatus.NotImplemented;
public NtStatus SetEndOfFile(string fileName, long length, DokanFileInfo info) => NtStatus.NotImplemented;
public NtStatus SetAllocationSize(string fileName, long length, DokanFileInfo info) => NtStatus.NotImplemented;
public NtStatus LockFile(string fileName, long offset, long length, DokanFileInfo info) => NtStatus.NotImplemented;
public NtStatus UnlockFile(string fileName, long offset, long length, DokanFileInfo info) => NtStatus.NotImplemented;
public NtStatus GetDiskFreeSpace(out long freeBytesAvailable, out long totalBytes, out long totalFreeBytes, DokanFileInfo info)
{
_logger.Info("GetDiskFreeSpace");
freeBytesAvailable = totalBytes = totalFreeBytes = 1024L * 1024 * 1024 * 10;
return NtStatus.Success;
}
public NtStatus GetVolumeInformation(out string volumeLabel, out FileSystemFeatures features, out string fileSystemName, DokanFileInfo info)
{
_logger.Info("GetVolumeInformation");
volumeLabel = "MySQLFS";
fileSystemName = "NTFS";
features = FileSystemFeatures.None;
return NtStatus.Success;
}
public NtStatus GetFileSecurity(string fileName, out FileSystemSecurity security, AccessControlSections sections, DokanFileInfo info)
{
security = null;
return NtStatus.NotImplemented;
}
public NtStatus SetFileSecurity(string fileName, FileSystemSecurity security, AccessControlSections sections, DokanFileInfo info) => NtStatus.NotImplemented;
public NtStatus Mounted(DokanFileInfo info) => NtStatus.Success;
public NtStatus Unmounted(DokanFileInfo info) => NtStatus.Success;

public static void Main(string[] args)
{
var fs = new DokanNetTestApplication("Server=localhost;Database=filesystemdb;User ID=root;Password=yourpassword;");
fs.Mount("M:\\", DokanOptions.DebugMode | DokanOptions.StderrOutput, 5);
}

// Mount-Methode, die das Dateisystem mit Dokan mountet
public void Mount(string mountPoint, DokanOptions options, int threadCount)
{
Dokan.Mount(this, mountPoint, options, threadCount);
}
}

public class VirtualFile
{
public int Id { get; set; }
public string Filename { get; set; }
public string Path { get; set; }
public byte[] Content { get; set; }
public long Size { get; set; }
}