COS3711 Assignment 3 2025

COS3711
Assignment 3
Unique No:
Due 2025

,Part A — Client side: serializing pallets and sending over TCP (threaded)

Design overview

 Use QXmlStreamWriter to construct the XML document in a structured and
efficient manner.
 Perform both serialization and network transmission inside a worker object that is
executed on a QThread so the GUI remains responsive.
 The worker communicates with the UI through signals that report progress,
success, or error conditions.
 When the TCP connection to the server is established and the XML data has
been transmitted, the resulting XML string is displayed inside a QTextEdit widget
in the serialization tab.

Container code validation

The server uses this regular expression to check container identifiers:

^(20[0-9]{2})/(0[1-9]|1[0-2])/[BC](\d{1,4})$

 Year: 2000–2099
 Month: 01–12
 Category: B or C
 Serial number: 1–9999

Client: SerializationWorker (Header)
// SerializationWorker.h
#ifndef SERIALIZATIONWORKER_H
#define SERIALIZATIONWORKER_H


#include <QObject>
#include <QString>
#include <map>

, #include <memory>
#include <vector>


// Forward declarations
class Pallet;
class QTcpSocket;


/*
* SerializationWorker
*
* This worker is designed to run on a background thread.
* It handles XML construction from pallet data and
* transmits the result to a remote server.
*/
class SerializationWorker : public QObject {
Q_OBJECT
public:
explicit SerializationWorker(const std::map<int, Pallet*>& pallets);
~SerializationWorker();


public slots:
// Entry point for execution when moved to a thread
void process();


signals:
// Triggered when XML has been built and sent successfully
void finished(const QString& xml);


// Triggered when an error occurs
void error(const QString& message);