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|
(.using
[library
[lux (.except)
["@" target]
["[0]" ffi (.only import object do_to)]
[abstract
[monad (.only do)]]
[control
["[0]" try (.only Try)]
["[0]" exception (.only exception:)]
["[0]" io (.only IO)]
[concurrency
["[0]" atom (.only Atom)]]]
[data
["[0]" binary (.only Binary)]
["[0]" text (.only)
["%" \\format (.only format)]]
[collection
["[0]" array]
["[0]" dictionary (.only Dictionary)]]]]])
(type: .public Library
(Atom (Dictionary Text Binary)))
(exception: .public (already_stored [class Text])
(exception.report
"Class" class))
(exception: .public (unknown [class Text])
(exception.report
"Class" class))
(exception: .public (cannot_define [class Text
error Text])
(exception.report
"Class" class
"Error" error))
(import java/lang/Object
"[1]::[0]"
(getClass [] (java/lang/Class java/lang/Object)))
(import java/lang/String
"[1]::[0]")
(import java/lang/reflect/Method
"[1]::[0]"
(invoke [java/lang/Object [java/lang/Object]] "try" java/lang/Object))
(import (java/lang/Class a)
"[1]::[0]"
(getDeclaredMethod [java/lang/String [(java/lang/Class [? < java/lang/Object])]] java/lang/reflect/Method))
(import java/lang/Integer
"[1]::[0]"
("read_only" "static" TYPE (java/lang/Class java/lang/Integer)))
(import java/lang/reflect/AccessibleObject
"[1]::[0]"
(setAccessible [boolean] void))
(import java/lang/ClassLoader
"[1]::[0]"
(loadClass [java/lang/String]
"io" "try" (java/lang/Class java/lang/Object)))
(with_expansions [<elemT> (these (java/lang/Class java/lang/Object))]
(def: java/lang/ClassLoader::defineClass
java/lang/reflect/Method
(let [signature (|> (ffi.array <elemT> 4)
(ffi.write! 0 (as <elemT>
(ffi.class_for java/lang/String)))
(ffi.write! 1 (java/lang/Object::getClass (ffi.array byte 0)))
(ffi.write! 2 (as <elemT>
(java/lang/Integer::TYPE)))
(ffi.write! 3 (as <elemT>
(java/lang/Integer::TYPE))))]
(do_to (java/lang/Class::getDeclaredMethod (ffi.as_string "defineClass")
signature
(ffi.class_for java/lang/ClassLoader))
(java/lang/reflect/AccessibleObject::setAccessible true)))))
(def: .public (define class_name bytecode loader)
(-> Text Binary java/lang/ClassLoader (Try java/lang/Object))
(let [signature (array.of_list (list (as java/lang/Object
class_name)
(as java/lang/Object
bytecode)
(as java/lang/Object
(|> 0
(as (Primitive "java.lang.Long"))
ffi.long_to_int))
(as java/lang/Object
(|> bytecode
binary.size
(as (Primitive "java.lang.Long"))
ffi.long_to_int))))]
(java/lang/reflect/Method::invoke loader signature java/lang/ClassLoader::defineClass)))
(def: .public (new_library _)
(-> Any Library)
(atom.atom (dictionary.empty text.hash)))
(def: .public (memory library)
(-> Library java/lang/ClassLoader)
(with_expansions [<cast> (for @.old
(<|)
@.jvm
"jvm object cast")]
(<| <cast>
(object [] java/lang/ClassLoader []
[]
(java/lang/ClassLoader (findClass self [class_name java/lang/String])
(java/lang/Class [? < java/lang/Object])
"throws" [java/lang/ClassNotFoundException]
(let [class_name (as Text class_name)
classes (|> library atom.read! io.run!)]
(case (dictionary.value class_name classes)
{.#Some bytecode}
(case (..define class_name bytecode (<| <cast> self))
{try.#Success class}
(as_expected class)
{try.#Failure error}
(panic! (exception.error ..cannot_define [class_name error])))
{.#None}
(panic! (exception.error ..unknown [class_name])))))))))
(def: .public (store name bytecode library)
(-> Text Binary Library (IO (Try Any)))
(do [! io.monad]
[library' (atom.read! library)]
(if (dictionary.key? library' name)
(in (exception.except ..already_stored name))
(do !
[_ (atom.update! (dictionary.has name bytecode) library)]
(in {try.#Success []})))))
(def: .public (load name loader)
(-> Text java/lang/ClassLoader
(IO (Try (java/lang/Class java/lang/Object))))
(java/lang/ClassLoader::loadClass (ffi.as_string name) loader))
|
