final ObjectId aSth = odi.insert(OBJ_BLOB, "a.sth".getBytes());
final ObjectId aTxt = odi.insert(OBJ_BLOB, "a.txt".getBytes());
final ObjectId bSth = odi.insert(OBJ_BLOB, "b.sth".getBytes());
final ObjectId bTxt = odi.insert(OBJ_BLOB, "b.txt".getBytes());
final DirCache dc = db.readDirCache();
final DirCacheBuilder builder = dc.builder();
final DirCacheEntry aSthEntry = new DirCacheEntry("a.sth");
aSthEntry.setFileMode(FileMode.REGULAR_FILE);
aSthEntry.setObjectId(aSth);
final DirCacheEntry aTxtEntry = new DirCacheEntry("a.txt");
aTxtEntry.setFileMode(FileMode.REGULAR_FILE);