Hi all, Continuing the work on the new differentiation framework, I am facing a silly naming problem. This problem is exactly the same I encountered while I updated the solvers: the Java language does not allow to inherit from the same parameterized interface with two different parameters.
So when I want to update class LevenbergMarquardtOptimizer which extends AbstractLeastSquaresOptimizer which itself extends BaseAbstractMultivariateVectorOptimizer<DifferentiableMultivariateVectorFunction>, I hit the problem. I cannot have BaseAbstractMultivariateVectorOptimizer<MultivariateDifferentiableVectorFunction> in the same hierarchy. For solvers, we decided to duplicate the hierarchy, and I ended up creating a new NewtonRaphsonSolver while deprecating the older NewtonSolver. I would like to do the same for the optimizers. As the intermediate class AbstractLeastSquaresOptimizer is not really something most users will use, a simple name change to AbstractLSOptimizer seems sufficient. Such simple name changes would not be good for end-users classes like LevenbergMarquardtOptimizer, NonLinearConjugateGradientOptimizer or GaussNewtonOptimizer. Note that the core algorithms do not change at all, only the signatures change as well as one line in AbstractLeastSquaresOptimizer (to be precise, the changed line is from: "jF = f.jacobian()" to "jf = jF = new JacobianFunction(f)"). Does someone has clever name changes to propose or should I simply keep only the existing classes, add the new signatures but do not declare them as implementing top level parameterized interfaces? I'm sorry to ask such silly questions, but I am stuck with this Java limitation. best regards, Luc --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org For additional commands, e-mail: dev-h...@commons.apache.org
