/// <summary>
///
/// </summary>
/// <param name="parentFolder"></param>
/// <param name="newFolderName"></param>
/// <returns></returns>
/// <exception cref="InsufficientSpaceException"></exception>
/// <exception cref="MaximumFileSizeReachedException"></exception>
/// <exception cref="ArgumentNullException"></exception>
/// <exception cref="FolderAlreadyExistsException"></exception>
private FolderNode CreateFolder(FolderNode parentFolder, string newFolderName)
{
MethodArgumentValidator.ThrowIfNull(parentFolder, "parentFolder");
MethodArgumentValidator.ThrowIfStringIsNullOrEmpty(newFolderName, "newFolderName");
var subfolders = _nodeResolver.GetAllFoldersFrom(parentFolder);
var folderWithSameName = subfolders.FirstOrDefault(subfolder => _namesComparer.Equals(subfolder.Name, newFolderName));
if (folderWithSameName != null)
{
throw new FolderAlreadyExistsException("Подпапка с именем \"{0}\" уже существует в папке \"{1}\"".FormatWith(newFolderName, parentFolder.Name));
}
var freeBlocks = _freeBlockManager.AcquireFreeBlocks(3);
int blockToStoreFileReferencesIn = freeBlocks[0];
int blockToStoreFolderNodeIn = freeBlocks[1];
int blockToStoreSubfolderReferencesIn = freeBlocks[2];
var fileReferencesStreamDefinition = new DataStreamDefinition(blockToStoreFileReferencesIn, 0);
var folderReferencesStreamDefinition = new DataStreamDefinition(blockToStoreSubfolderReferencesIn, 0);
try
{
// Note: может стать последней каплей для переполненного диска, и тогда блоки придется отпустить
_blockReferenceListsEditor.AddBlockReference(blockToStoreFolderNodeIn, parentFolder.FolderReferencesStreamDefinition, parentFolder);
}
catch (Exception)
{
_freeBlockManager.MarkBlocksAsFree(freeBlocks);
throw;
}
var creationTime = DateTime.UtcNow;
var newNode = new FolderNode(newFolderName, Guid.NewGuid(), blockToStoreFolderNodeIn, parentFolder.DiskBlockIndex, fileReferencesStreamDefinition, folderReferencesStreamDefinition, creationTime, Guid.NewGuid());
_fileSystemNodeStorage.WriteNode(newNode);
return(newNode);
}
/// <exception cref="ArgumentNullException"></exception>
/// <exception cref="FileAlreadyExistsException"></exception>
/// <exception cref="NoFreeBlocksException"></exception>
/// <exception cref="InsufficientSpaceException"></exception>
/// <exception cref="MaximumFileSizeReachedException"></exception>
private FileNode CreateFile(FolderNode parentFolder, string fileName)
{
MethodArgumentValidator.ThrowIfNull(parentFolder, "parentFolder");
MethodArgumentValidator.ThrowIfStringIsNullOrEmpty(fileName, "fileName");
var filesInTheFolder = _nodeResolver.GetAllFilesFrom(parentFolder);
var fileWithSameName = filesInTheFolder.FirstOrDefault(file => _namesComparer.Equals(file.Name, fileName));
if (fileWithSameName != null)
{
throw new FileAlreadyExistsException("Файл с именем \"{0}\" уже существует в папке \"{1}\"".FormatWith(fileName, parentFolder.Name));
}
var freeBlocks = _freeBlockManager.AcquireFreeBlocks(2);
int blockToStoreDefinitionIn = freeBlocks[0];
int blockToStoreFileNodeIn = freeBlocks[1];
var fileContentsStreamDefinition = new DataStreamDefinition(blockToStoreDefinitionIn, 0);
try
{
// Note: это добавление ссылки может стать последней каплей для заполненного диска, тогда блоки придется отпустить
_blockReferenceListsEditor.AddBlockReference(blockToStoreFileNodeIn, parentFolder.FileReferencesStreamDefinition, parentFolder);
}
catch (Exception)
{
_freeBlockManager.MarkBlocksAsFree(freeBlocks);
throw;
}
var creationTime = DateTime.UtcNow;
var fileNode = new FileNode(fileName, Guid.NewGuid(), blockToStoreFileNodeIn, fileContentsStreamDefinition, creationTime, creationTime, Guid.NewGuid());
_fileSystemNodeStorage.WriteNode(fileNode);
return(fileNode);
}
public void Format(IVirtualDisk virtualDisk, FileSystemNodeStorage fileSystemNodeStorage)
{
var numberOfBlocksToMap = virtualDisk.NumberOfBlocks - FileSystemHeaderReservedBlocks;
int numberOfBytesNeededToStoreTheMap =
SpaceRequirementsCalculator.GetNumberOfChunksNeededToStoreData(numberOfBlocksToMap, Constants.NumberOfBitsInByte);
int numberOfBlocksNeededToStoreTheMap =
SpaceRequirementsCalculator.GetNumberOfChunksNeededToStoreData(numberOfBytesNeededToStoreTheMap,
virtualDisk.BlockSizeInBytes);
numberOfBlocksToMap -= numberOfBlocksNeededToStoreTheMap;
var freeSpaceBitmap = new BitArray(numberOfBytesNeededToStoreTheMap);
freeSpaceBitmap.Length = numberOfBlocksToMap;
var store = new FreeSpaceBitmapStore(virtualDisk, VirtualDiskFormatter.FreeSpaceStartingBlockIndex);
var freeBlockManagerBitArrayBased =
new FreeBlockManagerBitArrayBased(freeSpaceBitmap, FreeSpaceStartingBlockIndex + numberOfBlocksNeededToStoreTheMap, numberOfBlocksToMap);
var freeBlockManager = new FreeBlockManagerDiskWriting(store, freeBlockManagerBitArrayBased);
var freeBlocks = freeBlockManager.AcquireFreeBlocks(3);
int rootBlockIndex = freeBlocks[0];
int rootFileReferencesBlock = freeBlocks[1];
int rootFolderReferencesBlock = freeBlocks[2];
var fileContentsStreamDefinition = new DataStreamDefinition(rootFileReferencesBlock, 0);
var folderContentsStreamDefinition = new DataStreamDefinition(rootFolderReferencesBlock, 0);
var rootNode = new FolderNode("root", Guid.NewGuid(), rootBlockIndex, 0, fileContentsStreamDefinition, folderContentsStreamDefinition, DateTime.UtcNow, Guid.NewGuid());
fileSystemNodeStorage.WriteNode(rootNode);
fileSystemNodeStorage.WriteFileSystemHeader(new FileSystemHeader(rootBlockIndex, new Version(1, 0, 0, 0)), FileSystemHeaderBlockIndex);
}
