@Override public int hashCode() { final int prime = 31; int result = 1; result = prime * (int) (xid ^ (xid >>> 32)); result = prime * result + ((tableId == null) ? 0 : tableId.hashCode()); result = prime * result + ((checksum == null) ? 0 : checksum.hashCode()); result = prime * result + ((key == null) ? 0 : key.hashCode()); result = prime * result + ((value == null) ? 0 : value.hashCode()); return result; }