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Posted to issues@commons.apache.org by "Peter Bloem (Created) (JIRA)" <ji...@apache.org> on 2011/12/06 18:07:48 UTC
[jira] [Created] (MATH-719) Strange deprecations in API
Strange deprecations in API
---------------------------
Key: MATH-719
URL: https://issues.apache.org/jira/browse/MATH-719
Project: Commons Math
Issue Type: Bug
Affects Versions: 2.2, 2.1, 2.0
Reporter: Peter Bloem
Priority: Minor
Sorry if this doesn't belong here. I couldn't find any sort of mailing list or other feedback mechanism on the website.
RealMatrix has some very odd deprecations. In particular inverse(), getDeterminant() and isSingular(). The last has the message:
bq. Deprecated. as of release 2.0, replaced by the boolean negation of new LUDecompositionImpl(m).getSolver().isNonSingular()
That's an implementation, not an interface. The whole point of having an interface is that
* I can query whether a matrix is singular withou having to know about LUDecompositions
* You guys can change the implementation of isSingular() if something better pops up without us guys having to change our code.
I'm not using these methods now, because they're deprecated, but I've basically recreated them in as static methods in a utility class. Wouldn't it be much better to just put code from the deprecation message into the method and remove the deprecation?
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[jira] [Resolved] (MATH-719) Strange deprecations in API
Posted by "Gilles (Resolved) (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/MATH-719?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Gilles resolved MATH-719.
-------------------------
Resolution: Later
It is unlikely that we can come up with a new design before the release of v3.0.
This must be thoroughly discussed first on the "dev" ML, together with other matrix interface issues.
> Strange deprecations in API
> ---------------------------
>
> Key: MATH-719
> URL: https://issues.apache.org/jira/browse/MATH-719
> Project: Commons Math
> Issue Type: Bug
> Affects Versions: 2.0, 2.1, 2.2
> Reporter: Peter Bloem
> Priority: Minor
> Labels: api-change, deprecated
>
> Sorry if this doesn't belong here. I couldn't find any sort of mailing list or other feedback mechanism on the website.
> RealMatrix has some very odd deprecations. In particular inverse(), getDeterminant() and isSingular(). The last has the message:
> bq. Deprecated. as of release 2.0, replaced by the boolean negation of new LUDecompositionImpl(m).getSolver().isNonSingular()
> That's an implementation, not an interface. The whole point of having an interface is that
> * I can query whether a matrix is singular withou having to know about LUDecompositions
> * You guys can change the implementation of isSingular() if something better pops up without us guys having to change our code.
> I'm not using these methods now, because they're deprecated, but I've basically recreated them in as static methods in a utility class. Wouldn't it be much better to just put code from the deprecation message into the method and remove the deprecation?
--
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[jira] [Commented] (MATH-719) Strange deprecations in API
Posted by "Gilles (Commented) (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/MATH-719?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13163737#comment-13163737 ]
Gilles commented on MATH-719:
-----------------------------
bq. Sorry if this doesn't belong here.
Indeed, you'd better bring this kind of issue to the "dev" ML. :)
The more so that there have been recent discussions about changing the matrix API and decisions ought to be made quite soon now.
> Strange deprecations in API
> ---------------------------
>
> Key: MATH-719
> URL: https://issues.apache.org/jira/browse/MATH-719
> Project: Commons Math
> Issue Type: Bug
> Affects Versions: 2.0, 2.1, 2.2
> Reporter: Peter Bloem
> Priority: Minor
> Labels: api-change, deprecated
>
> Sorry if this doesn't belong here. I couldn't find any sort of mailing list or other feedback mechanism on the website.
> RealMatrix has some very odd deprecations. In particular inverse(), getDeterminant() and isSingular(). The last has the message:
> bq. Deprecated. as of release 2.0, replaced by the boolean negation of new LUDecompositionImpl(m).getSolver().isNonSingular()
> That's an implementation, not an interface. The whole point of having an interface is that
> * I can query whether a matrix is singular withou having to know about LUDecompositions
> * You guys can change the implementation of isSingular() if something better pops up without us guys having to change our code.
> I'm not using these methods now, because they're deprecated, but I've basically recreated them in as static methods in a utility class. Wouldn't it be much better to just put code from the deprecation message into the method and remove the deprecation?
--
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[jira] [Commented] (MATH-719) Strange deprecations in API
Posted by "Peter Bloem (Commented) (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/MATH-719?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13163786#comment-13163786 ]
Peter Bloem commented on MATH-719:
----------------------------------
Ah, so there is a mailing list. I guess I should have looked a little harder. I'll bring it up there.
> Strange deprecations in API
> ---------------------------
>
> Key: MATH-719
> URL: https://issues.apache.org/jira/browse/MATH-719
> Project: Commons Math
> Issue Type: Bug
> Affects Versions: 2.0, 2.1, 2.2
> Reporter: Peter Bloem
> Priority: Minor
> Labels: api-change, deprecated
>
> Sorry if this doesn't belong here. I couldn't find any sort of mailing list or other feedback mechanism on the website.
> RealMatrix has some very odd deprecations. In particular inverse(), getDeterminant() and isSingular(). The last has the message:
> bq. Deprecated. as of release 2.0, replaced by the boolean negation of new LUDecompositionImpl(m).getSolver().isNonSingular()
> That's an implementation, not an interface. The whole point of having an interface is that
> * I can query whether a matrix is singular withou having to know about LUDecompositions
> * You guys can change the implementation of isSingular() if something better pops up without us guys having to change our code.
> I'm not using these methods now, because they're deprecated, but I've basically recreated them in as static methods in a utility class. Wouldn't it be much better to just put code from the deprecation message into the method and remove the deprecation?
--
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