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(;module:
lux
(lux (control monad)
(concurrency ["A" atom])
(data ["R" result]
[text]
text/format
(coll ["d" dict]
[array #+ Array]))
[macro #+ Monad<Lux>]
host
[io])
(luxc ["&" base]
(generator ["&&;" common])
))
(jvm-import java.lang.reflect.AccessibleObject
(setAccessible [boolean] void))
(jvm-import java.lang.reflect.Method
(invoke [Object (Array Object)] #try Object))
(jvm-import (java.lang.Class a)
(getDeclaredMethod [String (Array (Class Object))] #try Method))
(jvm-import java.lang.Object
(getClass [] (Class Object)))
(jvm-import java.lang.Integer
(#static TYPE (Class Integer)))
(jvm-import java.lang.ClassLoader)
(def: ClassLoader::defineClass
Method
(case (Class.getDeclaredMethod ["defineClass"
(|> (array (Class Object) +4)
(array-store +0 (:! (Class Object) (class-for String)))
(array-store +1 (Object.getClass [] (array byte +0)))
(array-store +2 (:! (Class Object) Integer.TYPE))
(array-store +3 (:! (Class Object) Integer.TYPE)))]
(class-for java.lang.ClassLoader))
(#R;Success method)
(do-to method
(AccessibleObject.setAccessible [true]))
(#R;Error error)
(error! error)))
(def: (define-class class-name byte-code loader)
(-> Text &&common;Bytecode ClassLoader (R;Result Object))
(Method.invoke [loader
(array;from-list (list (:! Object class-name)
(:! Object byte-code)
(:! Object (l2i 0))
(:! Object (l2i (nat-to-int (array-length byte-code))))))]
ClassLoader::defineClass))
(def: (fetch-byte-code class-name store)
(-> Text &&common;Class-Store (Maybe &&common;Bytecode))
(|> store A;get io;run (d;get class-name)))
(def: (memory-class-loader store)
(-> &&common;Class-Store ClassLoader)
(object ClassLoader []
[]
(ClassLoader (findClass [class-name String]) Class
(case (fetch-byte-code class-name store)
(#;Some bytecode)
(case (define-class class-name bytecode (:! ClassLoader _jvm_this))
(#R;Success class)
(:!! class)
(#R;Error error)
(error! (format "Class definiton error: " class-name "\n"
error)))
#;None
(error! (format "Class not found: " class-name))))))
(def: #export (init-host _)
(-> Top &&common;Host)
(let [store (: &&common;Class-Store
(A;atom (d;new text;Hash<Text>)))]
{#&&common;loader (memory-class-loader store)
#&&common;store store}))
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