Java passing custom objects to Clojure

Question

I have a .java file that will be called for its public String solve() method to answer a problem. The method receives project-defined Java class RP, which contains a collection of RF, which each contain a collection of RO, which each contain several RA which, finally, boil down to String, String pairs (a name and a value). My question is, (how) can I have that solve() method pass its RP object to Clojure where I believe I can do all the work to generate a solution more effectively, and eventually return a String solution back?

EDIT: What I'm looking for is some way of saying, String answer = toClojure(RP); and in Clojure I'll be able to do the equivalent of RP.getRF().getRO().getRA().getName(), where each of these functions is defined in the Java classes.

@Jani we're talking about nested data structures here, so I'm not sure what code to give. There are four classes here which, along with some functions, basically boil down to: Collection[Collection[Collection[Collection <String, String>]]]. I need to pass the top-level one to Clojure and be able to get at the lower levels as needed. — WorldsEndless
– WorldsEndless, Commented Sep 16, 2014 at 11:28
Calling clojure from java stackoverflow.com/questions/2181774/… — edbond
– edbond, Commented Sep 16, 2014 at 11:48
I don't see the difference. You can import RP and call (.. rp .getRF .getRO .getRA .getName) — edbond
– edbond, Commented Sep 16, 2014 at 12:27
@edbond You want (-> rp .getRF .getRO .getRA .getName), or (.. rp getRF getRO getRA getName) if you insist on using ..: the . interop is added automatically by ... — amalloy
– amalloy, Commented Sep 17, 2014 at 1:21

amalloy · Accepted Answer · 2014-09-17 01:22:23Z

2

Just pass it the object reference, same as you would pass it to a java method. Clojure doesn't need any special magic to receive java objects.

answered Sep 17, 2014 at 1:22

amalloy

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