private static IFileSystem GetFileSystem(string text, out Path path)
{
if (_providers == null)
{
throw new InvalidOperationException("The value of 'Services' property is null.");
}
if (string.IsNullOrWhiteSpace(text))
{
throw new ArgumentNullException("text");
}
//如果路径解析失败则返回空
if (!Path.TryParse(text, out path))
{
return(null);
}
//如果路径模式为空则返回本地文件系统
if (string.IsNullOrEmpty(path.Schema))
{
return(LocalFileSystem.Instance);
}
var fileSystem = _providers.Resolve <IFileSystem>(path.Schema);
if (fileSystem == null)
{
throw new InvalidOperationException(string.Format("Can not obtain the File or Directory provider by the '{0}' path.", path));
}
return(fileSystem);
}
private static IFileSystem GetFileSystem(string text, bool throwException, out Path path)
{
if (throwException)
{
path = Path.Parse(text);
}
else if (!Path.TryParse(text, out path))
{
return(null);
}
var scheme = path.Scheme;
//如果路径模式为空则使用默认文件系统方案
if (string.IsNullOrEmpty(scheme))
{
if (path.Anchor == PathAnchor.Application)
{
return(LocalFileSystem.Instance);
}
scheme = FileSystem.Scheme;
//如果文件系统模式为空则返回本地文件方案
if (string.IsNullOrEmpty(scheme))
{
return(LocalFileSystem.Instance);
}
}
//尝试获取对应的文件系统提供程序
_providers.TryGet(scheme, out var fileSystem);
if (fileSystem == null)
{
if (throwException)
{
throw new IOException($"Can not obtain the File or Directory provider by the '{text}'.");
}
return(null);
}
return(fileSystem);
}
private static IFileSystem GetFileSystem(string text, out Path path)
{
var providers = _providers;
if (providers == null)
{
throw new InvalidOperationException("The value of 'Providers' property is null.");
}
if (string.IsNullOrWhiteSpace(text))
{
throw new ArgumentNullException("text");
}
//如果路径解析失败则返回空
if (!Path.TryParse(text, out path))
{
return(null);
}
var scheme = path.Scheme;
//如果路径模式为空则使用默认文件系统方案
if (string.IsNullOrWhiteSpace(scheme))
{
scheme = FileSystem.Scheme;
//如果文件系统模式为空则返回本地文件方案
if (string.IsNullOrWhiteSpace(scheme))
{
return(LocalFileSystem.Instance);
}
}
//根据文件系统模式从服务容器中获得对应的文件系统提供程序
var fileSystem = providers.Resolve <IFileSystem>(scheme);
if (fileSystem == null)
{
throw new InvalidOperationException(string.Format("Can not obtain the File or Directory provider by the '{0}'.", text));
}
return(fileSystem);
}