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From "Gilles (JIRA)" <j...@apache.org>
Subject [jira] [Closed] (MATH-1003) Extensibility of CM classes: Please consider defaulting fields to protected instead of private.
Date Thu, 11 Jul 2013 20:39:48 GMT

     [ https://issues.apache.org/jira/browse/MATH-1003?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Gilles closed MATH-1003.
------------------------

    Resolution: Invalid

General discussions about design must take place on the "dev" ML.
This forum (JIRA) is a dedicated to specific issues.
Thanks.
                
> Extensibility of CM classes: Please consider defaulting fields to protected instead of
private.
> -----------------------------------------------------------------------------------------------
>
>                 Key: MATH-1003
>                 URL: https://issues.apache.org/jira/browse/MATH-1003
>             Project: Commons Math
>          Issue Type: Wish
>            Reporter: Ajo Fod
>
> Today I wanted to extend the DiagonalMatrix to use the inverse of a DiagonalMatrix in
matrix calculations. As you know the inverse of an n by n DiagonalMatrix takes only n steps.
So, I thought I'd extend the DiagonalMatrix ... it turns out that the data field is private.
Many other examples of private fields hindering extensibility exist in the Math code. 
> What is the recommended/easiest way to get around a problem like this? 

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