/**
* Add a new (sub-)directory with a given name to this directory.
*
* @param name
* @throws IOException
*/
public FSEntry addDirectory(String name) throws IOException {
if (getFileSystem().isReadOnly()) {
throw new ReadOnlyFileSystemException("addDirectory in readonly filesystem");
}
final long parentCluster;
if (file == null) {
parentCluster = 0;
} else {
parentCluster = file.getStartCluster();
}
return addFatDirectory(name, parentCluster);
}
/**
* Add a directory entry of the type directory.
*
* @param nameExt
* @param parentCluster
* @throws IOException
*/
protected synchronized FatDirEntry addFatDirectory(String nameExt, long parentCluster)
throws IOException {
final FatDirEntry entry = addFatFile(nameExt);
final int clusterSize = getFatFileSystem().getClusterSize();
entry.setFlags(FatConstants.F_DIRECTORY);
final FatFile file = entry.getFatFile();
file.setLength(clusterSize);
// TODO optimize it also to use ByteBuffer at lower level
// final byte[] buf = new byte[clusterSize];
final ByteBuffer buf = ByteBuffer.allocate(clusterSize);
// Clean the contents of this cluster to avoid reading strange data
// in the directory.
// file.write(0, buf, 0, buf.length);
file.write(0, buf);
file.getDirectory().initialize(file.getStartCluster(), parentCluster);
flush();
return entry;
}