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Posted to issues@commons.apache.org by "Gilles (JIRA)" <ji...@apache.org> on 2010/07/01 11:21:50 UTC
[jira] Reopened: (MATH-195) Inconsistencies in the Exception
hierarchy
[ https://issues.apache.org/jira/browse/MATH-195?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Gilles reopened MATH-195:
-------------------------
Assignee: Gilles (was: Brent Worden)
Focusing on the "Error handling" part of issue [MATH-361|https://issues.apache.org/jira/browse/MATH-361], I propose to take the summary of viewpoints (on the usage of checked vs unchecked exceptions) provided in this [article|http://www.ibm.com/developerworks/java/library/j-jtp05254.html], as a starting point for the discussion.
> Inconsistencies in the Exception hierarchy
> ------------------------------------------
>
> Key: MATH-195
> URL: https://issues.apache.org/jira/browse/MATH-195
> Project: Commons Math
> Issue Type: Improvement
> Affects Versions: 1.1, 1.2, 2.0, Nightly Builds
> Reporter: Thomas Chust
> Assignee: Gilles
> Priority: Minor
> Fix For: 2.1
>
> Original Estimate: 0.17h
> Remaining Estimate: 0.17h
>
> I think there are some inconsistencies in the hierarchy of exceptions used by the Commons Math library which could easily be fixed:
> - org.apache.commons.math.linear.MatrixIndexException should really be a subclass of
> java.lang.IndexOutOfBoundsException.
> - Either org.apache.commons.math.linear.InvalidMatrixException should be checked or
> org.apache.commons.math.random.NotPositiveDefiniteMatrixException and
> org.apache.commons.math.geometry.NotARotationMatrixException should be unchecked, but in any case the latter two
> should be subclasses of the former. An unchecked InvalidMatrixException should probably be a subclass of
> java.lang.ArithmeticException while a checked InvalidMatrixException should be a subclass of
> org.apache.commons.math.MathException.
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