public static Path fromString(String s) {
synchronized (Path.class) {
String[] segments = split(s);
Path current = sRoot;
for (int i = 0; i < segments.length; i++) {
current = current.getChild(segments[i]);
}
return current;
}
}
static void dumpAll(Path p, String prefix1, String prefix2) {
synchronized (Path.class) {
MediaObject obj = p.getObject();
Log.d(
TAG,
prefix1 + p.mSegment + ":" + (obj == null ? "null" : obj.getClass().getSimpleName()));
if (p.mChildren != null) {
ArrayList<String> childrenKeys = p.mChildren.keys();
int i = 0, n = childrenKeys.size();
for (String key : childrenKeys) {
Path child = p.mChildren.get(key);
if (child == null) {
++i;
continue;
}
Log.d(TAG, prefix2 + "|");
if (++i < n) {
dumpAll(child, prefix2 + "+-- ", prefix2 + "| ");
} else {
dumpAll(child, prefix2 + "+-- ", prefix2 + " ");
}
}
}
}
}
public static Uri getUriFor(Context context, Path path) {
if (sBaseUri == null) {
sBaseUri = Uri.parse("content://" + context.getPackageName() + ".provider");
}
return sBaseUri
.buildUpon()
.appendEncodedPath(path.toString().substring(1)) // ignore the leading '/'
.build();
}
// TODO: consider concurrent access
@Override
public String getType(Uri uri) {
long token = Binder.clearCallingIdentity();
try {
Path path = Path.fromString(uri.getPath());
MediaItem item = (MediaItem) mDataManager.getMediaObject(path);
return item != null ? item.getMimeType() : null;
} finally {
Binder.restoreCallingIdentity(token);
}
}
// TODO: consider concurrent access
@Override
public Cursor query(
Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder) {
long token = Binder.clearCallingIdentity();
try {
Path path = Path.fromString(uri.getPath());
MediaObject object = mDataManager.getMediaObject(path);
if (object == null) {
Log.w(TAG, "cannot find: " + uri);
return null;
}
return null;
} finally {
Binder.restoreCallingIdentity(token);
}
}
@Override
public ParcelFileDescriptor openFile(Uri uri, String mode) throws FileNotFoundException {
long token = Binder.clearCallingIdentity();
try {
if (mode.contains("w")) {
throw new FileNotFoundException("cannot open file for write");
}
Path path = Path.fromString(uri.getPath());
MediaObject object = mDataManager.getMediaObject(path);
if (object == null) {
throw new FileNotFoundException(uri.toString());
}
throw new FileNotFoundException("unspported type: " + object);
} finally {
Binder.restoreCallingIdentity(token);
}
}