public void addNewPastMeeting(Set<Contact> contacts, Calendar date, String text) {
Calendar now = new GregorianCalendar();
if (contacts.isEmpty() || !contactSet.containsAll(contacts)) {
throw new IllegalArgumentException("One or more Contacts do not exist OR set is empty");
} else if (contacts == null || date == null || text == null) {
throw new NullPointerException("One or more arguments are null");
} else if (date.after(now)) {
throw new IllegalArgumentException("Cannot create a past meeting with a future date!");
} else // an exception hasn't been thrown, so we can add the meeting
{
PastMeeting pastMeeting = new PastMeetingImpl(meetingIdAssigner(), contacts, date);
/**
* @see PastMeetingImpl#addNotes(String) use this method to add notes to avoid unnecessary
* code duplication
*/
((PastMeetingImpl) pastMeeting).addNotes(text);
meetingSet.add(pastMeeting); // add to main meeting set AFTER notes are added
pastMeetings.add(pastMeeting); // add to list of past meetings AFTER notes are added
}
}
/**
* This method is used EITHER: when a future meeting happens, and is then converted to a past
* meeting (with notes), OR: to add notes to a past meeting at a date after its creation.
*/
public void addMeetingNotes(int id, String text) {
Meeting meeting = getMeeting(id); // find meeting by id - will be null if doesn't exist
if (meeting == null) {
throw new IllegalArgumentException("Specified meeting does not exist!");
} else if (text == null) {
throw new NullPointerException("Cannot add null string of notes");
} else if (((MeetingImpl) meeting).inFuture() == true) {
throw new IllegalStateException(
"Meeting set for date in the future - not eligible for conversion!");
} else if (meeting instanceof FutureMeeting) // we know it's a future meeting needing conversion
{
/**
* @param convertedMeeting name to indicate the original FutureMeeting type is now a
* PastMeeting the 0 id field (an impossible id) is a flag to let us know whether or not
* it goes through the for loop if statement
*/
Set<Contact> set =
new HashSet<
Contact>(); // to use for our empty convertedMeeting, to avoid a NullPointerException
PastMeeting convertedMeeting = new PastMeetingImpl(0, set, null);
for (FutureMeeting fm : futureMeetings) {
if (fm.getId() == id) {
/**
* convertedMeeting is now re-constructed with proper values, which shows that we have an
* id match
*/
convertedMeeting = new PastMeetingImpl(fm.getId(), fm.getContacts(), fm.getDate());
}
}
if (convertedMeeting.getId()
== 0) // i.e. we haven't had an id match (got into the for loop if statement)
{
throw new IllegalArgumentException("Couldn't find meeting in list of meetings!");
} else // we know that convertedMeeting has been through the for loop if statement, so can add
// it to our sets/lists
{
meetingSet.remove(meeting); // remove the old FutureMeeting from main meeting set
futureMeetings.remove(meeting); // remove the old FutureMeeting from list of future meetings
pastMeetings.add(convertedMeeting); // add the new PastMeeting to list of past meetings
meetingSet.add(convertedMeeting); // add the new PastMeeting to main meeting set
/**
* here we call this method again to add the notes to our new PastMeeting object, knowing it
* will drop through to the else if below (as it is now an instanceof PastMeeting)
*/
addMeetingNotes(convertedMeeting.getId(), text);
}
} else if (meeting
instanceof
PastMeeting) // this will catch cases where we just want to add notes to a PastMeeting
// (including the convertedMeeting)
{
for (PastMeeting pm : pastMeetings) {
if (pm.getId() == id) {
meetingSet.remove(
meeting); // remove the old PastMeeting (without new note) from list of past meetings
pastMeetings.remove(
pm); // add the new PastMeeting (without new note) from list of past meetings
/**
* @see PastMeetingImpl#addNotes(String) use this method to actually add notes to avoid
* unnecessary code duplication
*/
((PastMeetingImpl) pm).addNotes(text);
pastMeetings.add(pm); // add the new PastMeeting (with new note) to list of past meetings
meetingSet.add(pm); // add the new PastMeeting (with new note) to main meeting set
} else {
throw new IllegalArgumentException("Couldn't find meeting in list of meetings!");
}
}
}
}