public HarddiskDirectory GetSubdirectory(VolumePath path, bool create = false)
{
if (Path.Equals(path))
{
return(this);
}
if (!Path.IsParent(path))
{
throw new KOSException("This directory does not contain path: " + path.ToString());
}
string subdirectory = path.Segments[Path.Segments.Count];
if (!items.ContainsKey(subdirectory))
{
if (create)
{
CreateDirectory(subdirectory);
}
else
{
return(null);
}
}
HarddiskDirectory directory = items[subdirectory] as HarddiskDirectory;
if (directory == null)
{
throw new KOSPersistenceException("Directory does not exist: " + path.ToString());
}
return(directory.GetSubdirectory(path, create));
}
public override VolumeFile CreateFile(VolumePath path)
{
if (path.Depth == 0)
{
throw new KOSPersistenceException("Can't create a file over root directory");
}
HarddiskDirectory directory = ParentDirectoryForPath(path, true);
return(directory.CreateFile(path.Name));
}
public override VolumeItem Open(VolumePath path, bool ksmDefault = false)
{
if (path.Depth == 0)
{
return(Root);
}
HarddiskDirectory directory = ParentDirectoryForPath(path);
return(directory == null ? null : directory.Open(path.Name, ksmDefault));
}
public override bool Delete(VolumePath path, bool ksmDefault = false)
{
if (path.Depth == 0)
{
throw new KOSPersistenceException("Can't delete root directory");
}
HarddiskDirectory directory = ParentDirectoryForPath(path);
return(directory.Delete(path.Name, ksmDefault));
}
private HarddiskDirectory ParentDirectoryForPath(VolumePath path, bool create = false)
{
HarddiskDirectory directory = RootHarddiskDirectory;
if (path.Depth > 0)
{
return(RootHarddiskDirectory.GetSubdirectory(path.GetParent(), create));
}
else
{
throw new Exception("This directory does not have a parent");
}
}
public HarddiskDirectory CreateDirectory(string name, HarddiskDirectory directory)
{
try
{
items.Add(name, directory);
}
catch (ArgumentException)
{
throw new KOSPersistenceException("Already exists: " + name);
}
return(directory);
}
public override bool Exists(VolumePath path, bool ksmDefault = false)
{
if (path.Depth == 0)
{
return(true);
}
HarddiskDirectory directory = ParentDirectoryForPath(path);
if (directory == null)
{
return(false);
}
return(directory.Exists(path.Name, ksmDefault));
}
public override VolumeFile SaveFile(VolumePath path, FileContent content, bool verifyFreeSpace = true)
{
try
{
if (verifyFreeSpace && !IsRoomFor(path, content))
{
return(null);
}
}
catch (KOSPersistenceException)
{
throw new KOSPersistenceException("Can't save file over a directory: " + path);
}
HarddiskDirectory directory = ParentDirectoryForPath(path, true);
return(directory.Save(path.Name, content) as VolumeFile);
}
public Harddisk(int size)
{
Capacity = size;
RootHarddiskDirectory = new HarddiskDirectory(this, VolumePath.EMPTY);
}
