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clojure 2026-05-02
I have a problem invoking dynamically a constructor of a java class which takes "variadic" String. The first syntax does work, while I want the second to work, as I want to create the class "reflective":
(org.renjin.sexp.StringArrayVector. (into-array String ["1"]))
;;=> #object[org.renjin.sexp.StringArrayVector 0x50f4d755 "1"]
(clojure.lang.Reflector/invokeConstructor
(Class/forName "org.renjin.sexp.StringArrayVector")
(into-array String ["1"]))
;;=> Execution error (IllegalArgumentException) at scicloj.metamorph.ml.r-model-matrix/eval54341 (r_model_matrix.clj:102).
;; No matching ctor found for class org.renjin.sexp.StringArrayVector
;;found it.... "array of array" was needed for invokeConstructore
(clojure.lang.Reflector/invokeConstructor
(Class/forName "org.renjin.sexp.StringArrayVector")
(object-array [(into-array String ["1"])])))
dpsutton 2026-05-02T14:28:27.621089Z
it needs an array of arguments? and you were just passing the arguments rather than a collection of them?
yes, indded.
dpsutton 2026-05-02T14:29:32.286009Z
ha. that stuff gets tricky sometimes and you just have to rubber duck it. basically apply
👍 1