wood burning stoves 2.0*
The moose likes Java in General and the fly likes reflection and overloading, java.lang.IllegalArgumentException: wrong number of arguments Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login


Win a copy of Murach's Java Servlets and JSP this week in the Servlets forum!
JavaRanch » Java Forums » Java » Java in General
Bookmark "reflection and overloading, java.lang.IllegalArgumentException: wrong number of arguments" Watch "reflection and overloading, java.lang.IllegalArgumentException: wrong number of arguments" New topic
Author

reflection and overloading, java.lang.IllegalArgumentException: wrong number of arguments

Alessandro Ilardo
Ranch Hand

Joined: Dec 23, 2005
Posts: 218
I am testing an ejb with a client which uses the Junit framework.
On the ejb I have two public methods

public User getUser(final String email, final String domain)
public User getUser(final Long id)

the client code is something like this


called by a junit test


The test doesn't complete correctly and I get this exception
834 [main] FATAL eu.virtualLab.security.user.test.util.ServiceLocator - java.lang.IllegalArgumentException: wrong number of arguments
835 [main] FATAL eu.virtualLab.security.user.test.junit.JunitUserActions - [testGetUser] wrong number of arguments

Could you please give me some help about it?
Thanks in advance
Campbell Ritchie
Sheriff

Joined: Oct 13, 2005
Posts: 37884
    
  22
Don't know, sorry, but that looks too difficult for us beginners. Moving.
Steve Luke
Bartender

Joined: Jan 28, 2003
Posts: 4164
    
  21

It looks to me like you have to find a better way of caching methods. You have 2 methods with different numbers of parameters. Whichever is the first one that is searched for will be cached and returned for any time another method with the same method name is called. This will cause problems when you would have overloaded methods with different single parameters as well (for example a getUser(Long) and a getUser(Integer)).

I would suggest putting more information in the cache's key, for example the method name and the list of parameter types. For example this would be a utility method that could help you generate a more useful key:


You could call it in your getRemoteMethod() method like:


Steve
Alessandro Ilardo
Ranch Hand

Joined: Dec 23, 2005
Posts: 218
Thank you, you're right
 
I agree. Here's the link: http://aspose.com/file-tools
 
subject: reflection and overloading, java.lang.IllegalArgumentException: wrong number of arguments
 
Similar Threads
Multithreading in Quartz Scheduler
JUnit 4.6 (newbie) not assertion error displayed
Fake a post request from java class
client lookup java.lang.ClassCastException: $Proxy0
Reflection Problem - I feel like a Vampire... No reflection found...