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Gilles commented on MATH-439:
-----------------------------
{{UnivariateRealSolverImpl}} removed in revision 1041225.
> Refactoring of solvers (package "analysis.solvers")
> ---------------------------------------------------
>
> Key: MATH-439
> URL: https://issues.apache.org/jira/browse/MATH-439
> Project: Commons Math
> Issue Type: Improvement
> Reporter: Gilles
> Priority: Minor
> Fix For: 3.0
>
> Attachments: AbstractUnivariateRealSolver.java, NLCG.testCircleFitting.txt
>
>
> The classes in package "analysis.solvers" could be refactored similarly to what was done
for package {{optimization}}.
> * Replace {{MaxIterationsExceededException}} with {{TooManyEvaluationsException}}:
> Apart from the class {{MaxIterationsExceededException}} being deprecated, this approach
makes it difficult to compare different algorithms: While the concept of iteration is algorithm-dependent,
the user is probably mostly interested in the number of function evaluations.
> * Implement the method {{solve}} in the base class ({{UnivariateRealSolverImpl}}) and
define an abstract method {{doSolve}} to be implemented in derived classes. This method would
then use a new {{computeObjectiveFunction}} method that will take care of the counting of
the function evaluations.
> * Remove "protected" fields (the root is unnecessary since it is returned by {{solve}}).
Arguingly the function value is also not very useful (as we know what it should be), except
for debugging purposes (in which case, it might not be a problem to call the function's {{value}}
method once more).
> * Remove the tolerance setter (accuracy) and make the corresponding fields "final".
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