/**
* Da der Export eines einzelnen Events besondere Handlungen erfordert, gibt es diese Methode.
* Hinweis: zum Exportieren von Event-Listen ist diese Methode nicht geeignet, verwende exportTo()
* stattdessen.
*
* <p>Es muessen folgende Daten exportiert werden: - Name des Events - Daten des Betreuers - Daten
* jedes einzelnen Studenten (Teilnehmer) - Projekte - Termine
*
* @param fileName
* @param data
* @return
*/
public static boolean exportEventTo(String fileName, Event event) {
try {
Database db = Workspace.getInstance().getDatabase();
// Oeffne Datei zum Schreiben
PrintWriter out = new PrintWriter(new OutputStreamWriter(new FileOutputStream(fileName)));
// Allgemeine Infos des Events
out.println("Veranstaltung " + event.getName());
out.println(event.getDesc());
out.println(event.getID());
out.println();
// Daten des Eventbetreuers
out.println("Betreuer");
out.print(event.getTutor().getID() + ", ");
out.print(event.getTutor().getLastName() + ", ");
out.print(event.getTutor().getFirstName());
out.println();
out.println();
// Gruppen
out.println("Gruppen");
out.println("Gruppen-Nr., Beschreibung");
ArrayList<Group> groups = db.getGroupsInEvent(event.getID());
for (Group g : groups) {
out.print(g.getID() + ",");
out.print(g.getDesc().replace(",", "\\0x2C")); // Kommas ersetzen um csv zu sichern
out.println();
}
out.println();
// Teilnehmer
out.println("Studenten");
out.println("Matrikelnummer, Name, Vorname, Email, Gruppen-Nummer");
ArrayList<Student> stds = db.getStudentsInEvent(event.getID());
for (Student std : stds) {
out.print(std.getMatNr() + ", ");
out.print(std.getLastName() + ", ");
out.print(std.getFirstName() + ", ");
out.print(std.getEmail() + ",");
Group eventGroup = db.getEventGroup(std, event.getID());
out.print(eventGroup == null ? 0 : eventGroup.getID());
out.println();
}
out.println();
// Projekte der Veranstaltung
out.println("Projekte");
out.println("ID, Beschreibung, Start, Ende");
ArrayList<Integer> pids = db.getProjectsInEvent(event.getID());
for (int pid : pids) {
String desc = db.getProjectDesc(pid).replace(",", "\\0x2C");
Timestamp start = db.getProjectDate(pid);
Timestamp end = db.getProjectDeadline(pid);
if (end == null) end = new Timestamp(Long.MAX_VALUE);
out.print(pid + ",");
out.print(desc + ",");
out.print(start.getTime() + ",");
out.print(end.getTime());
out.println();
}
out.println();
// Noten fuer die Projekte
out.println("Benotung");
out.println("Projekt-ID, Matrikel-Nr., Note");
for (Student std : stds) {
ArrayList<ArrayList<Object>> notenInfo = db.getResults(std, "ProjectID");
for (ArrayList<Object> o : notenInfo) {
out.print(o.get(0) + ",");
out.print(std.getMatNr() + ",");
out.print(((String) o.get(2)).replace(",", "\\0x2C"));
out.println();
}
}
out.println();
// Termine der Veranstaltung
out.println("Termine");
out.println("ID, Datum");
ArrayList<Term> terms = db.getTermsInEvent(event.getID());
for (Term term : terms) {
out.print(term.getTermID() + ",");
out.print(term.getDate().getTime());
out.println();
}
out.println();
// Datei abschliessen
out.flush();
out.close();
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/**
* Importiert ein Event aus einer CSV-Datei.
*
* @param fileName
* @return
*/
public static Event importEventFrom(String fileName) {
try {
Database db = Workspace.getInstance().getDatabase();
Event event = new Event();
BufferedReader in = new BufferedReader(new InputStreamReader(new FileInputStream(fileName)));
String line = in.readLine();
if (!line.startsWith("Veranstaltung ")) return null;
// Lese Name der Veranstaltung
line = line.substring("Veranstaltung ".length());
event.setName(line);
// Lese Beschreibung
line = in.readLine();
event.setDesc(line);
// Lese Event ID
line = in.readLine();
event.setID(Integer.parseInt(line.trim()));
in.readLine(); // Ueberspringen
// Lese Betreuer
line = in.readLine();
if (!line.equals("Betreuer")) return null;
line = in.readLine();
String[] lines = line.split(",");
int id = Integer.parseInt(lines[0].trim());
String lastName = lines[1].trim();
String firstName = lines[2].trim();
Tutor tutor = new Tutor(id, lastName, firstName);
event.setTutor(tutor);
in.readLine();
// Event in die Datenbank schreiben.
// Dies ist hier schon notwendig, da Term darauf verweist.
Event oldEvent = Workspace.getInstance().getDatabase().getEvent(event.getID());
if (oldEvent != null) {
if (oldEvent.equals(event)) Workspace.getInstance().getDatabase().updateEvent(event);
else {
do event.setID(event.getID() + 1);
while (Workspace.getInstance().getDatabase().getEvent(event.getID()) != null);
Workspace.getInstance().getDatabase().addEvent(event);
}
} else Workspace.getInstance().getDatabase().addEvent(event);
// Gruppen
line = in.readLine();
if (!line.equals("Gruppen")) return null;
line = in.readLine(); // Spaltenueberschriften
ArrayList<Group> groups = new ArrayList<Group>();
for (; ; ) {
line = in.readLine();
if (line == null || line.equals("")) break;
lines = line.split(","); // Gruppen-ID, Beschreibung
groups.add(new Group(Integer.parseInt(lines[0]), lines[1].replace("\\0x2C", ",")));
}
// Teilnehmer
line = in.readLine();
if (!line.equals("Studenten")) return null;
line = in.readLine(); // Spaltenueberschriften
ArrayList<Student> students = new ArrayList<Student>();
ArrayList<ArrayList<Integer>> studToGroup = new ArrayList<ArrayList<Integer>>();
for (; ; ) {
line = in.readLine();
if (line == null || line.equals("")) break;
lines = line.split(","); // Matrikelnummer, Name, Vorname, Email
int matNr = Integer.parseInt(lines[0].trim());
String name = lines[1].trim();
String fname = lines[2].trim();
String email = lines[3].trim();
int gruppe = Integer.parseInt(lines[4].trim());
students.add(new Student(name, fname, matNr, email));
// Gruppenzuordnung
ArrayList<Integer> innerStudToGroup = new ArrayList<Integer>();
innerStudToGroup.add(matNr);
innerStudToGroup.add(gruppe);
studToGroup.add(innerStudToGroup);
}
// Projekte einlesen
line = in.readLine();
if (!line.equals("Projekte")) return null;
line = in.readLine(); // ID, Beschreibung, Start, Ende
ArrayList<Project> projects = new ArrayList<Project>();
for (; ; ) {
line = in.readLine();
if (line == null || line.equals("")) break;
lines = line.split(",");
int pid = Integer.parseInt(lines[0].trim());
String desc = lines[1].trim().replace("\\0x2C", ",");
Timestamp start = new Timestamp(Long.parseLong(lines[2].trim()));
Timestamp end = new Timestamp(Long.parseLong(lines[3].trim()));
// Projekte muessen gespeichert werden, da eventuell
// das Projekt noch nicht angelegt wurde
projects.add(new Project(pid, desc, start, end));
}
// Benotung einlesen
line = in.readLine();
if (!line.equals("Benotung")) return null;
line = in.readLine(); // Projekt-ID, Matrikel-Nr., Note
ArrayList<ArrayList<Object>> results = new ArrayList<ArrayList<Object>>();
for (; ; ) {
line = in.readLine();
if (line == null || line.equals("")) break;
lines = line.split(",");
ArrayList<Object> innerResults = new ArrayList<Object>();
innerResults.add(Integer.parseInt(lines[0].trim())); // ProjectID
innerResults.add(Integer.parseInt(lines[1].trim())); // Matr-Nr.
innerResults.add(lines[2].trim().replace("\\0x2C", ",")); // Result
results.add(innerResults);
}
// Termine einlesen
line = in.readLine();
if (!line.equals("Termine")) return null;
line = in.readLine(); // Datum
ArrayList<Term> terms = new ArrayList<Term>();
for (; ; ) {
line = in.readLine();
if (line == null || line.equals("")) break;
lines = line.split(",");
terms.add(
new Term(
Integer.parseInt(lines[0].trim()),
event.getID(),
new Timestamp(Long.parseLong(lines[1].trim()))));
}
// Aenderungen in die Datenbank uebernehmen
// Tutor
Tutor oldTutor = Workspace.getInstance().getDatabase().getTutor(event.getTutor().getID());
if (oldTutor != null) {
if (oldTutor.equals(event.getTutor()))
Workspace.getInstance().getDatabase().updateTutor(event.getTutor());
else {
do event.getTutor().setID(event.getTutor().getID() + 1);
while (Workspace.getInstance().getDatabase().getTutor(event.getTutor().getID()) != null);
}
} else Workspace.getInstance().getDatabase().addTutor(event.getTutor());
// Teilnehmer
for (Student std : students) {
try {
db.addStudent(std);
} catch (SQLException e) {
System.out.println("Student " + std + " schon vorhanden.");
}
db.addStudentToEvent(std, event);
}
// Gruppen
for (Group g : groups) {
g.insertInEvent(event.getID());
// Gruppenzuordnung
for (ArrayList<Integer> innerStudToGroup : studToGroup) {
int gNr = innerStudToGroup.get(1);
if (g.getID() == gNr) g.add(db.getStudent(innerStudToGroup.get(0)));
}
}
// Projekte
for (Project p : projects) {
try {
db.addProjectToEvent(p, event);
} catch (SQLException e) {
// e.printStackTrace();
e.printStackTrace();
System.out.println("Projekt " + p.getDescription() + " existiert schon!");
}
}
// Benotung
for (ArrayList<Object> res : results) {
try {
int mNr = (Integer) res.get(1);
int pID = (Integer) res.get(0);
Student stud = null;
for (Student st : students) {
if (st.getMatNr() == mNr) stud = st;
}
if (stud != null) {
db.addStudentToProject(stud, pID);
db.setMark(mNr, pID, (String) res.get(2));
}
stud = null;
} catch (SQLException e) {
// setMark macht ein automatisches Update, falls Insert fehlschlaegt
// Jegliche Exception muss also ein echter Datenbankfehler sein!
e.printStackTrace();
}
}
// Termine
for (Term term : terms) {
try {
db.addTermToEvent(term, event);
} catch (SQLException e) {
System.out.println("Termin existiert schon!");
}
}
// Workspace-Tree updaten
Workspace.getInstance().updateTree("");
return event;
} catch (Exception e) {
e.printStackTrace();
return null;
}
}