Unable to customize UsernamePasswordCredential class in CAS 7.2.4

[Prakash Thapa]

I am trying to customize the UsernamePasswordCredential class by extending it from the CAS default class. However I am unable to proceed further as I am getting typecast issue in the doAuthentication() of AbstractUsernamePasswordAuthenticationHandler class. I have customized AbstractUsernamePasswordAuthenticationHandler to support the new Custom UsernamePasswordCredential class.

Block of Code:

public abstract class CustomAbstractUsernamePasswordAuthenticationHandler extends AbstractUsernamePasswordAuthenticationHandler {

@Override
protected final AuthenticationHandlerExecutionResult doAuthentication(Credential credential, final Service service) throws Throwable {
final CustomUsernamePasswordCredential originalUserPass = (CustomUsernamePasswordCredential) credential;
......
......
}
}

Error Message: 

• Cannot cast 'org.apereo.cas.authentication.handler.support.CustomUsernamePasswordCredential' to 'org.apereo.cas.authentication.handler.support.CustomUsernamePasswordCredential'

[Prakash Thapa]

This is the code snippe

[Ray Bon]

Prakash,

This sounds more like a java problem.

You could check with instanceOf before casting.

Ray

---

From: cas-...@apereo.org <cas-...@apereo.org> on behalf of Prakash Thapa <thapaprak...@gmail.com>
Sent: September 1, 2025 22:14
To: CAS Community <cas-...@apereo.org>
Subject: [cas-user] Unable to customize UsernamePasswordCredential class in CAS 7.2.4

 

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[Prakash Thapa]

Hi Ray,

The credential instanceof CustomUsernamePasswordCredential returns false. But the credential.getClass() returns the same class i.e. CustomUsernamePasswordCredential, to which I am trying to typecast.

[Ray Bon]

Prakash,

Do the full path hierarchies match?

That is, is it possible there is another CustomUsernamePasswordCredential class?

This strange casting problem can occur with multiple class loaders (cast acting in only one loader). How are you running cas?

Ray

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From: Prakash Thapa <thapaprak...@gmail.com>
Sent: September 2, 2025 21:01
To: CAS Community <cas-...@apereo.org>
Cc: Ray Bon <rb...@uvic.ca>
Subject: Re: [cas-user] Unable to customize UsernamePasswordCredential class in CAS 7.2.4