Package org.bedework.calfacade.base

Interface Differable<T>

Type Parameters:

T -

All Known Implementing Classes:

BwAlarm, BwAttendee, BwOrganizer

public interface Differable<T>

Interface which defines an implementing class as being differeable.

This is to distinguish it from Comparable. The issue here is that hibernate requires that equals return true for entities which refer to the same db object. Thus objects with the same key values will return equals == true even if other fields differ.

The Comparable interface declaration states

It is strongly recommended (though not required) that natural orderings
 be consistent with equals. 

This means we need some other way to determine that two entities, though equal are in fact different in some respect. For example, we may have two attendee objects for the same person but with a different partstat.

Version:

1.0

Author:

Mike Douglass

Method Summary

Modifier and Type	Method	Description
boolean	differsFrom(T val)	Return true if the entity differs in any way.

Method Details

differsFrom

boolean differsFrom(T val)

Return true if the entity differs in any way.

Parameters:

val -

Returns:

boolean