I want to use a Java constructor as a first-class Clojure function. My use-case is to transform a sequence of strings into a sequence of Java objects that have a constructor with a single string:
Simple Java object:
public class Foo {
public Foo(String aString){
// initialize the Foo object from aString
}
}
And in Clojure I want to do this:
(defn make-foo (memfn Foo. a-string))
(apply make-foo '("one" "two" "shoe"))
The apply should return a list of Foo objects created from Strings, but I'm getting this:
IllegalArgumentException No matching method found: org.apache.hadoop.io.Text. for class java.lang.String clojure.lang.Reflector.invokeMatchingMethod (Reflector.java:53)
Don't bother. memfn
is practically deprecated in favor of the anonymous function literal, with which you can also invoke constructors, eg, #(Foo. %)
.
Also, your apply
call is going to try to invoke make-foo
once with three string args. You probably instead want:
(map #(Foo. %) ["one" "two" "three"])
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