Hello all...
I've been stuck for a good 2 hours trying to figure out why I'm getting
this exception on a very simple example:
ClassCastException clojure.lang.ArraySeq cannot be cast to [D
clojure.lang.Numbers.doubles (Numbers.java:1280)
I have 2 very simple functions:
---------------------------------------------------------------------------------------------------
(defn normalize
[data high-end low-end]
(let [norm (NormalizeArray.)]
(do (. norm setNormalizedHigh high-end)
(. norm setNormalizedLow low-end)
(. norm process data)))) ;;returns array of doubles
(fn [window-size prediction-size]
(let [twa (TemporalWindowArray. window-size prediction-size)]
(do (. twa analyze (normalize data)) ;;analyze expects array of doubles
(. twa process (normalize data))))) ;;same here
---------------------------------------------------------------------------------------------------
Now, I know for a fact that 'normalize' will return the last statement
in the 'do' block which is the call to the process method which in turn
will produce a double array. In theory all is well cos analyze and
process also expect double arrays for arguments. However, I am getting
the above exception even though the types are correctly passed in! I
used (class (normalize data 0.9 0.1)) and I do get back an array of
doubles!!!
What exactly is happening? Any Java interop gurus out there?
Thanks in advance...
Jim
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