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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