Refactoring of solvers (package "analysis.solvers")
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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
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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