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(.module:
[lux (#- Module Definition)
["." host (#+ import: do-to object)]
[abstract
[monad (#+ do)]]
[control
pipe
["." try (#+ Try)]
["." exception (#+ exception:)]
["." io (#+ IO io)]
[concurrency
["." atom (#+ Atom atom)]]]
[data
[binary (#+ Binary)]
["." product]
["." text ("#@." hash)
["%" format (#+ format)]]
[collection
["." array]
["." dictionary (#+ Dictionary)]]]
[target
[jvm
["." loader (#+ Library)]
["." type
["." descriptor]]]]
[tool
[compiler
[language
[lux
["." version]
["." generation]]]
[meta
[io (#+ lux-context)]
[archive
[descriptor (#+ Module)]
["." artifact]]]]]]
[///
[host
["." jvm (#+ Inst Definition Host State)
["." def]
["." inst]]]]
)
(import: #long java/lang/reflect/Field
(get [#? java/lang/Object] #try #? java/lang/Object))
(import: #long (java/lang/Class a)
(getField [java/lang/String] #try java/lang/reflect/Field))
(import: #long java/lang/Object
(getClass [] (java/lang/Class java/lang/Object)))
(import: #long java/lang/ClassLoader)
(type: #export ByteCode Binary)
(def: #export value-field Text "_value")
(def: #export $Value (type.class "java.lang.Object" (list)))
(exception: #export (cannot-load {class Text} {error Text})
(exception.report
["Class" class]
["Error" error]))
(exception: #export (invalid-field {class Text} {field Text} {error Text})
(exception.report
["Class" class]
["Field" field]
["Error" error]))
(exception: #export (invalid-value {class Text})
(exception.report
["Class" class]))
(def: (class-value class-name class)
(-> Text (java/lang/Class java/lang/Object) (Try Any))
(case (java/lang/Class::getField ..value-field class)
(#try.Success field)
(case (java/lang/reflect/Field::get #.None field)
(#try.Success ?value)
(case ?value
(#.Some value)
(#try.Success value)
#.None
(exception.throw ..invalid-value class-name))
(#try.Failure error)
(exception.throw ..cannot-load [class-name error]))
(#try.Failure error)
(exception.throw ..invalid-field [class-name ..value-field error])))
(def: class-path-separator ".")
(def: #export bytecode-name
(-> Text Text)
(text.replace-all ..class-path-separator .module-separator))
(def: #export (class-name [module-id artifact-id])
(-> generation.Context Text)
(format lux-context
..class-path-separator (%.nat version.version)
..class-path-separator (%.nat module-id)
..class-path-separator (%.nat artifact-id)))
(def: (evaluate! library loader context valueI)
(-> Library java/lang/ClassLoader generation.Context Inst (Try [Any Definition]))
(let [eval-class (..class-name context)
bytecode-name (..bytecode-name eval-class)
bytecode (def.class #jvm.V1_6
#jvm.Public jvm.noneC
bytecode-name
(list) $Value
(list)
(|>> (def.field #jvm.Public ($_ jvm.++F jvm.finalF jvm.staticF)
..value-field ..$Value)
(def.method #jvm.Public ($_ jvm.++M jvm.staticM jvm.strictM)
"<clinit>"
(type.method [(list) type.void (list)])
(|>> valueI
(inst.PUTSTATIC (type.class bytecode-name (list)) ..value-field ..$Value)
inst.RETURN))))]
(io.run (do (try.with io.monad)
[_ (loader.store eval-class bytecode library)
class (loader.load eval-class loader)
value (:: io.monad wrap (..class-value eval-class class))]
(wrap [value
[eval-class bytecode]])))))
(def: (execute! library loader [class-name class-bytecode])
(-> Library java/lang/ClassLoader Definition (Try Any))
(io.run (do (try.with io.monad)
[existing-class? (|> (atom.read library)
(:: io.monad map (dictionary.contains? class-name))
(try.lift io.monad)
(: (IO (Try Bit))))
_ (if existing-class?
(wrap [])
(loader.store class-name class-bytecode library))]
(loader.load class-name loader))))
(def: (define! library loader context valueI)
(-> Library java/lang/ClassLoader generation.Context Inst (Try [Text Any Definition]))
(do try.monad
[[value definition] (evaluate! library loader context valueI)]
(wrap [(..class-name context) value definition])))
(def: #export host
(IO Host)
(io (let [library (loader.new-library [])
loader (loader.memory library)]
(: Host
(structure
(def: (evaluate! context valueI)
(:: try.monad map product.left
(..evaluate! library loader context valueI)))
(def: execute!
(..execute! library loader))
(def: define!
(..define! library loader))
(def: (ingest context bytecode)
[(..class-name context) bytecode])
(def: (re-learn context [_ bytecode])
(io.run
(loader.store (..class-name context) bytecode library)))
(def: (re-load context [_ bytecode])
(io.run
(do (try.with io.monad)
[#let [class-name (..class-name context)]
_ (loader.store class-name bytecode library)
class (loader.load class-name loader)]
(:: io.monad wrap (..class-value class-name class))))))))))
(def: #export $Variant (type.array ..$Value))
(def: #export $Tuple (type.array ..$Value))
(def: #export $Runtime (type.class (..class-name [0 0]) (list)))
(def: #export $Function (type.class (..class-name [0 1]) (list)))
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