tiennm99/lombok
1
0
Fork 0
mirror of https://github.com/tiennm99/lombok.git synced 2026-08-22 18:25:32 +00:00
Code Issues Packages Projects Releases Wiki Activity

Added link to SpoonVennersOdersky paper about equality.

Browse Source
This commit is contained in:
Reinier Zwitserloot
2010-11-18 14:04:32 +01:00
parent 5595943f06
commit c86d0fcc37
1 changed files with 3 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files
website/features/EqualsAndHashCode.html
+3 -3
View File
@@ -35,9 +35,9 @@
</p><p>
<em>NEW in Lombok 0.10: </em>Unless your class is <code>final</code> and extends <code>java.lang.Object</code>, lombok generates a <code>canEqual</code> method
which means JPA proxies can still be equal to their base class, but subclasses that add new state don't break the equals contract. The complicated reasons for
why such a method is necessary are explained in this paper: (TODO: Find link to Venners/Spoon/Odersky). If all classes in a hierarchy are a mix of scala case classes
and classes with lombok-generated equals methods, all equality will 'just work'. If you need to write your own equals methods, you should always override <code>canEqual</code>
if you change <code>equals</code> and <code>hashCode</code>.
why such a method is necessary are explained in this paper: <a href="http://www.artima.com/lejava/articles/equality.html">How to Write an Equality Method in Java</a>.
If all classes in a hierarchy are a mix of scala case classes and classes with lombok-generated equals methods, all equality will 'just work'.
If you need to write your own equals methods, you should always override <code>canEqual</code> if you change <code>equals</code> and <code>hashCode</code>.
</p>
</div>
<div class="snippets">