Support both IO and clean version of Generate monad.

[hs-java.git] / TestGen.hs

diff --git a/TestGen.hs b/TestGen.hs
index a42fa052c64ee8e058ad68b17c4707dc13eb3315..31e71c0676ae0255d345a46d8ac1d6a502dd1dd5 100644 (file)
--- a/TestGen.hs
+++ b/TestGen.hs
@@ -2,27 +2,36 @@
 
 import qualified Data.ByteString.Lazy as B
 
-import JVM.Types
 import JVM.ClassFile
 import JVM.Converter
 import JVM.Assembler
-import JVM.Generator
-import JVM.Generator.Instructions
+import JVM.Builder
+import Java.ClassPath
 
 import qualified Java.Lang
 import qualified Java.IO
 
-hello :: NameType Method
-hello = NameType "hello" $ MethodSignature [IntType] ReturnsVoid
-
-test :: Generate ()
+test :: GenerateIO ()
 test = do
+  withClassPath $ do
+      -- Add current directory (with Hello.class) to ClassPath
+      addDirectory "."
+
+  -- Load method signature: Hello.hello()
+  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
@@ -36,18 +45,24 @@ 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)