DatedWordList

AddElementAt Clear RefreshDate RemoveAt

Attributes

AutoAdd Limit

Fields

instance DatedWordList tag;
          limit: 0;
          dates: nilObject;
        autoAdd: false;
end instance;

Define Class DatedWordList;
    inherits from ObjectList;
    
    field limit: Unsigned, getter;
        // maximum number of entries allowed in list
    field dates: IntegerList;
        // date/time each item was entered in list or last accessed
    field autoAdd: Boolean, getter, setter;
        // used by AutoAdd attribute
    
    attribute AutoAdd: Boolean;
        // called by structured field mechanism to determine whether new
        // entries typed by user are added to list automatically
    
    attribute Limit: Unsigned;
        // maximum number of entries allowed in list;
        // setter shrinks list by removing and destroying oldest entries if necessary;
        // override rarely
    
    operation RefreshDate(index: Unsigned), noFail;
        // call to set stored date/time of item at indexth position to current date/time;
        // override rarely
        
    overrides AddElementAt;
        // adds a corresponding date/time entry for new item;
        // if number of items overflows limit, removes oldest entry;
    overrides Clear;
        // clears dates list too
    overrides RemoveAt;
        // removes corresponding date/time entry
end class;