[Hibernate-issues] [Hibernate-JIRA] Commented: (HB-424) Exception wrappers should not add a message

[<leg...@at...>]

The following comment has been added to this issue:

     Author: Max Rydahl Andersen
    Created: Sat, 25 Oct 2003 6:22 AM
       Body:
well - it's not an easy call ;)

I'm inclined to say that if you want to do automatically "unwrapping" then it is much safer and sound to only do it on specific exceptions instead of relying on some .equals() relation between two exceptions!

So, we'll keep it as it is (unless you got a better argument ;)
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View the issue:

  http://opensource.atlassian.com/projects/hibernate/secure/ViewIssue.jspa?key=HB-424


Here is an overview of the issue:
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        Key: HB-424
    Summary: Exception wrappers should not add a message
       Type: Patch

     Status: Unassigned
   Priority: Minor

    Project: Hibernate2
 Components: 
             core
   Versions:
             2.1 beta 4

   Assignee: 
   Reporter: John Kristian

    Created: Thu, 23 Oct 2003 7:39 PM
    Updated: Thu, 23 Oct 2003 7:40 PM

Description:
The attached patch would be an improvement, from my point of view.

Exception classes that merely wrap another exception should not add anything to the message.  One reason is to simplify the implementation of code like this, which aims to remove such wrappers:

if (t instanceof Nestable || t instanceof InvocationTargetException || t instanceof UndeclaredThrowableException) {
    cause = t.getCause();
    if (cause != null) {
        String message = t.getMessage();
        if (message != null && message.length() > 0
            && ! message.equals(cause.getMessage()))
        {
            return t;
        }
    }
} else if (t instanceof etc...

Such code need not require special cases for Hibernate exceptions, if they refrain from adding to the message (as in the attached patch).


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