File	Doc	Category	Size	Date	Package
RootCache.java	API Doc	phoneME MR2 API (J2ME)	3602	Wed May 02 18:00:28 BST 2007	com.sun.midp.io.j2me.file

RootCache

• java.lang.Object

Fields Summary
private String[]	roots Current root paths.
private static RootCache	instance Reference to the root cache.

Constructors Summary
private RootCache() Constructs the root cache instance. // retrieve up-to-date mounted roots; array can not be null Vector v = Protocol.listRoots(); roots = new String[v.size()]; v.copyInto(roots);

Methods Summary
public synchronized void	addRoot(java.lang.String root) Adds a root to the cache. param root path to add to roots String[] a = new String[roots.length + 1]; System.arraycopy(roots, 0, a, 0, roots.length); a[roots.length] = root; roots = a;
public static synchronized com.sun.midp.io.j2me.file.RootCache	getInstance() Gets reference to the root cache. If an instance does not exist then creates it, otherwise returns existing one. return root cache reference if (instance == null) { instance = new RootCache(); } return instance;
public synchronized java.lang.String[]	getRoots() Gets the list of cached roots. return array of cached file system roots return roots;
public static synchronized void	initialize() Creates instance of root cache and fills it with current root paths. getInstance();
public synchronized boolean	isRoot(java.lang.String root) Checks if path is a root path. param root path to be checked return true if path is a root for (int i = 0; i < roots.length; i++) { if (root.equals(roots[i])) { return true; } } return false;
public synchronized void	removeRoot(java.lang.String root) Removes a root from the cache. param root path to be removed int index = -1; for (int i = 0; i < roots.length && index == -1; i++) { if (root.equals(roots[i])) { index = i; } } if (index != -1) { String[] a = new String[roots.length - 1]; System.arraycopy(roots, 0, a, 0, index); System.arraycopy(roots, index + 1, a, index, a.length - index); roots = a; }