public void clean(final boolean all) {
        for (OsmFile[] fileRow : fileRows) {
            if (fileRow == null) {
                continue;
            }
            for (OsmFile osmf : fileRow) {
                osmf.clean(all);
            }
        }
    }
Efficient cache or osmnodes

@author ab
main/src/main/java/cgeo/geocaching/brouter/mapaccess/NodesCache.java