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https://issues.apache.org/jira/browse/MATH-361?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12883008#action_12883008
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Phil Steitz commented on MATH-361:
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Hopefully we can have it both ways here - improve the exception hierarchy and
maintain informative failure-capture information in exception messages. I
don't think it makes sense to argue about who the exception messages are for -
developers at all levels in the application hierarchy, end users (in some
cases) or production support people may all have occasion to look at stack
traces or exception error messages. We are all thankful to API developers who
provide good exception error messages. Currently, commons math provides pretty
good failure-capture information in exception messages and I would like to make
sure that we do not lose that. We can add more state and structure to the
exception hierarchy, but I would like to see us maintain informative exception
error messages including meaningful failure context information.
I understand and support the desire to reduce the number of distinct error
messages that we maintain in the enums, but I really think we need to balance
user (that means whoever is looking at stack traces or logs including our
exception messages) convenience with making things simpler for us. If I were
chasing down a bug in my upper level code that was trying to create a gamma
distribution with a negative shape parameter, I would find my problem quickly
if I saw an IllegalArgumentException thrown by setAlphaInternal with a message
telling me that alpha was negative. However we refactor things, I want it to
stay that easy - no needless forays into the javadoc (which may not always be
readily available) or having to insert instrumentation to recover
failure-capture information.
> Localization and Error Handling
> -------------------------------
>
> Key: MATH-361
> URL: https://issues.apache.org/jira/browse/MATH-361
> Project: Commons Math
> Issue Type: Improvement
> Affects Versions: 2.1
> Reporter: Gilles
> Priority: Minor
> Attachments: l10n.tar.gz, res.tar.gz
>
>
> This proposal aims at easing the handling of error during algorithms
> development, and also enhancing the flexibility of the error reporting
> (provide meaningful exception classes and run-time selection of the
> localization formatting).
> More details at
> [http://www.mail-archive.com/[email protected]/msg14570.html]
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