[jira] Resolved: (MATH-285) FieldElement *interface* method names clash with already used method names

["Luc Maisonobe (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/MATH-285?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Luc Maisonobe resolved MATH-285.
--------------------------------

    Resolution: Won't Fix

Changing this would introduce a major incompatibility since it would change method names for already widely used classes like Complex and Fraction.

> FieldElement *interface* method names clash with already used method names
> --------------------------------------------------------------------------
>
>                 Key: MATH-285
>                 URL: https://issues.apache.org/jira/browse/MATH-285
>             Project: Commons Math
>          Issue Type: Improvement
>    Affects Versions: 2.0
>            Reporter: Klaus Hartlage
>            Priority: Minor
>
> This is probably to late to change, because release 2.0 is available now.
> But it would be good if the FieldElement *interface* method names don't clash with already used method names (expecially with the java.util.List#add() method) if you would like to adopt the interface for already existing number type hierarchies.
> For my hierachy I refactored the methods like this and could adopt the interface very fast. Otherwise you have to write a lot of wrappers to adopt the FieldElement interface.
> public interface FieldElement<T> {
>     /** Compute this + a.
>      * @param a element to add
>      * @return a new element representing this + a
>      */
>     T plus(T a);
>     /** Compute this - a.
>      * @param a element to subtract
>      * @return a new element representing this - a
>      */
>     T minus(T a);
>     /** Compute this &times; a.
>      * @param a element to multiply
>      * @return a new element representing this &times; a
>      */
>     T times(T a);
>     /** Compute this &divide; a.
>      * @param a element to add
>      * @return a new element representing this &divide; a
>      * @exception ArithmeticException if a is the zero of the
>      * additive operation (i.e. additive identity)
>      */
>     T div(T a) throws ArithmeticException;
> .....
> }

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