- (id) copyWithZone: (NSZone *) zone
{
    WWJournalPageMedia_Image *clone = [NSKeyedUnarchiver unarchiveObjectWithData:
                                       [NSKeyedArchiver archivedDataWithRootObject: self]];

    clone.imageResourceId = [[MediaResourceManger instance] copyDataWithID: self.imageResourceId];
    clone.resourceId      = generateNewResourceId();

    [clone save];

    return [clone retain];
}