Hello everyone, Looking at the present hierarchy of exceptions, I've had some further thoughts, actually supporting the use of context rather than property getters. Sticking with the same example, we have two exceptions - NonPositiveDefiniteMatrixException: already implemented - NonPositiveDefiniteLinearOperatorException: work in progress. These two exceptions refer to the same mathematical concept, and the former should probably extend the latter (just like AbstractRealMatrix extends RealLinearOperator). However, these two exceptions are thrown under quite different circumstances, with widely different parameters: - If I understood correctly, NonPositiveDefiniteMatrixException is thrown for example when a non-positive diagonal element is met, - NonPositiveDefiniteLinearOperator is to be thrown when a *vector* x is met, such as x'.a.x <= 0 (the entries of the operator as a matrix are not accessible). As you can see, the parameters of these exceptions will be different. We could have a getOffendingOperator() method, but probably not a getOffendingVector() method (since NonPositiveDefiniteMatrixException has no offending vector in its state).
Does that make sense? Best regards, Sébastien --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org For additional commands, e-mail: dev-h...@commons.apache.org
