public FilterSource(GalleryApp application) {
   super("filter");
   mApplication = application;
   mMatcher = new PathMatcher();
   mMatcher.add("/filter/mediatype/*/*", FILTER_BY_MEDIATYPE);
 }
 static {
   mMatcher.add("/secure/all/*", SECURE_ALBUM);
   mMatcher.add("/secure/unlock", SECURE_UNLOCK);
 }