MyEventComparator

java.lang.Object
- MusicLandscape.util.comparators.MyEventComparator

Direct Known Subclasses:

MyEventAttendeesComparator, MyEventDateComparator
```
public abstract class MyEventComparator
extends java.lang.Object
```
This class represents the concept of comparison of two events. It has a single abstract method that is to be implemented by concrete subclasses which implement concrete modes of comparison, e.g. by attendees, by date or other.

Since:

ExerciseSheet04

Version:

1

Author:

Jonas Altrock (ew20b126@technikum-wien.at)

- Constructor Summary
  
  Constructors
  Constructor Description
  
  MyEventComparator()
- Method Summary
  
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  
  abstract int compare(Event e1, Event e2)
  Compares two events.
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - MyEventComparator
```
public MyEventComparator()
```
- Method Detail
  - compare
```
public abstract int compare(Event e1,
                            Event e2)
```
    Compares two events.
    The result of the comparison of two events is a measure of "distance" between the tow. Distance is not literal (spatial) distance but more generally the difference between the two measured in some unit. If the two events are equal in a certain sense their distance is zero, if the first argument is smaller than the second (again, in the sense of the (concrete) comparator) their distance is negative, positive otherwise.
    Example: compare two events by date
    Event 1 (e1): March 10, 1979
    Event 2 (e2): April 1, 2000
    Calling compare of a by-date-comparator: compare(e1,e2) would return a negative number (since e1 is before e2)
    Comparators may choose to handle comparison of null tracks but are not forced to.
    
    Parameters:
    
    e1 - the one event to compare
    
    e2 - the other event to compare
    
    Returns:
    
    a measure of the distance between e1 and e2 in the sense of the comparator