[WICKET-1854] What's the point of requiring IConverters to be superclasses of the objects they convert?

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.4-M3
• Fix Version/s: 1.4-RC1
• Component/s: wicket
• Assignee: Johan Compagner
• Reporter: Maarten Billemont
• Created: 29/Sep/08 15:17
• Updated: 29/Sep/08 16:06
• Resolved: 29/Sep/08 16:06

Description

I'm trying to write a converter for my Entity classes; but am baffled by the seemingly useless requirement that the converter should extend the class of the object it's supposed to convert.

Why can't I just write a converter which is a plain class that implement IConverter? Why must this check exist?

The issue is about this code:

wicket/src/main/java/org/apache/wicket/markup/html/form/RadioChoice.java:437:

if (!converter.getClass().isAssignableFrom(objectClass))

{ throw new IllegalArgumentException("converter can not convert " + objectClass.getName() + " to string"); }