+ /**
+ * Write the list of list of packet pairs {@code List<List<PcapPacket>>} into a file.
+ *
+ * After the DBSCAN algorithm derives the clusters from pairs, we save the signature in the form of list of
+ * packet pairs. We harvest the pairs and transform them back into a list of PcapPacket objects.
+ * We do not maintain the pairs in the form of {@code Cluster<PcapPacketPair>} objects because there might be
+ * a situation where we could combine multiple PcapPacketPair objects into a longer signature, i.e., a string of
+ * PcapPacket objects and not just a pair.
+ *
+ * @param fileName The path of the file in {@link String}. We could leave this one {@code null} if we wanted the
+ * default file name {@code SERIALIZABLE_FILE_PATH}.
+ * @param clusterPackets The {@link Cluster} objects in the form of list of {@code PcapPacket} objects.
+ */
+ public static void serializeClustersIntoFile(String fileName, List<List<PcapPacket>> clusterPackets) {
+ if (fileName == null)
+ fileName = SERIALIZABLE_FILE_PATH;
+ try (ObjectOutputStream oos =
+ new ObjectOutputStream(new FileOutputStream(fileName))) {
+ oos.writeObject(clusterPackets);
+ } catch (Exception ex) {
+ ex.printStackTrace();
+ }
+ }
+
+ /**
+ * Read the list of list of packet pairs {@code List<List<PcapPacket>>} from a file.
+ *
+ * After the DBSCAN algorithm derives the clusters from pairs, we save the signature in the form of list of
+ * packet pairs. We harvest the pairs and transform them back into a list of PcapPacket objects.
+ * We do not maintain the pairs in the form of {@code Cluster<PcapPacketPair>} objects because there might be
+ * a situation where we could combine multiple PcapPacketPair objects into a longer signature, i.e., a string of
+ * PcapPacket objects and not just a pair.
+ *
+ * @param fileName The path of the file in {@link String}. We could leave this one {@code null} if we wanted the
+ * default file name {@code SERIALIZABLE_FILE_PATH}.
+ * @return The list of list of {@link Cluster} objects ({@code List<List<PcapPacket>>}) that is read from file.
+ */
+ public static List<List<PcapPacket>> serializeClustersFromFile(String fileName) {
+ if (fileName == null)
+ fileName = SERIALIZABLE_FILE_PATH;
+ List<List<PcapPacket>> ppListOfList = null;
+ try (ObjectInputStream ois =
+ new ObjectInputStream(new FileInputStream(fileName))) {
+ ppListOfList = (List<List<PcapPacket>>) ois.readObject();
+ } catch (Exception ex) {
+ ex.printStackTrace();
+ }
+
+ return ppListOfList;
+ }