cabal: bump data-default dependency to 0.5.0.

[hs-java.git] / TestGen.hs

diff --git a/TestGen.hs b/TestGen.hs
index 5bb8daad810cd28c777405cfe49b83387f2ffc9b..9d1bcd8caa43ae249056e1978970aee27106c8eb 100644 (file)
--- a/TestGen.hs
+++ b/TestGen.hs
@@ -1,26 +1,39 @@
-{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE OverloadedStrings, FlexibleContexts #-}
 
+import Control.Monad.Exception
 import qualified Data.ByteString.Lazy as B
 
 import JVM.ClassFile
 import JVM.Converter
 import JVM.Assembler
 import JVM.Builder
+import JVM.Exceptions
+import Java.ClassPath
 
 import qualified Java.Lang
 import qualified Java.IO
 
-hello :: NameType Method
-hello = NameType "hello" $ MethodSignature [IntType] ReturnsVoid
-
-test :: Generate ()
+test :: (Throws ENotFound e, Throws ENotLoaded e, Throws UnexpectedEndMethod e) => GenerateIO e ()
 test = do
+  withClassPath $ do
+      -- Add current directory (with Hello.class) to ClassPath
+      addDirectory "."
+
+  -- Load method signature: Hello.hello() from Hello.class
+  helloJava <- getClassMethod "./Hello" "hello"
+
+  -- Initializer method. Just calls java.lang.Object.<init>
   newMethod [ACC_PUBLIC] "<init>" [] ReturnsVoid $ do
+      setStackSize 1
+
       aload_ I0
       invokeSpecial Java.Lang.object Java.Lang.objectInit
       i0 RETURN
 
+  -- Declare hello() method and bind it's signature to hello.
   hello <- newMethod [ACC_PUBLIC, ACC_STATIC] "hello" [IntType] ReturnsVoid $ do
+      setStackSize 8
+
       getStaticField Java.Lang.system Java.IO.out
       loadString "Здравствуй, мир!"
       invokeVirtual Java.IO.printStream Java.IO.println
@@ -34,18 +47,24 @@ test = do
       invokeStatic Java.Lang.integer Java.Lang.valueOfInteger
       aastore
       invokeVirtual Java.IO.printStream Java.IO.printf
+      -- Call Hello.hello()
+      invokeStatic "Hello" helloJava
       pop
       i0 RETURN
 
-  newMethod [ACC_PUBLIC, ACC_STATIC] "main" [Array Nothing Java.Lang.stringClass] ReturnsVoid $ do
+  -- Main class method. 
+  newMethod [ACC_PUBLIC, ACC_STATIC] "main" [arrayOf Java.Lang.stringClass] ReturnsVoid $ do
+      setStackSize 1
+
       iconst_5
+      -- Call previously declared method
       invokeStatic "Test" hello
       i0 RETURN
 
   return ()
 
-testClass = generate "Test" test
-
+main :: IO ()
 main = do
+  testClass <- generateIO [] "Test" test
   B.writeFile "Test.class" (encodeClass testClass)