/**
* Konstruktor pro sestaveni cesty od korenoveho adresare k j*z existujici polozce
*
* @param fsi Polozka, jejiz cesta se ma sestavit
*/
public Path(FileSystemItem fsi) {
path = new Vector();
FileSystemItem akt = fsi;
if (fsi instanceof Directory) path.add(fsi);
while ((akt = akt.getParent()) != null) {
path.add(akt);
}
}
/**
* Prelozi adresar reprezentovany cestou na objekt typu Directory
*
* @param fs Souborovy system, ktery se ma pro preklad pouzit
* @param path Cesta pro preklad
* @return Vysledny adresar
* @throws FileSystemException Pokud neni adresar nalezen
*/
public static Directory parseDirectory(FileSystem fs, String path) throws FileSystemException {
Directory workDir;
if (path.charAt(0) == Path.PATH_SEPARATOR.charAt(0)) {
workDir = fs.getRootDirectory();
} else workDir = fs.getCurrentDirectory();
StringTokenizer st = new StringTokenizer(path, Path.PATH_SEPARATOR);
start:
while (st.hasMoreTokens()) {
String nextDir = st.nextToken();
if (nextDir.equals("..") && (workDir.getParent() != null)) {
workDir = workDir.getParent();
continue;
}
Iterator i = workDir.getIterator();
while (i.hasNext()) {
FileSystemItem fsi = (FileSystemItem) i.next();
if ((fsi.getName().equals(nextDir))) {
if (fsi instanceof Directory) {
workDir = (Directory) fsi;
continue start;
} else if (fsi instanceof Link && (((Link) fsi).getTarget() instanceof Directory)) {
workDir = (Directory) ((Link) fsi).getTarget();
continue start;
}
}
}
throw new FileSystemException("Directory not found");
}
return workDir;
}
