-- high-level Java classes, methods etc representation
module JVM.Converter
(parseClass, parseClassFile,
- convertClass, classFile,
+ classFile2Direct, classDirect2File,
encodeClass,
methodByName,
attrByName,
import Data.Word
import Data.Bits
import Data.Binary
+import Data.Default () -- import instances only
import qualified Data.ByteString.Lazy as B
import qualified Data.Set as S
import qualified Data.Map as M
import JVM.ClassFile
-import JVM.Types
+import JVM.Common
import JVM.Exceptions
-- | Parse .class file data
-parseClass :: B.ByteString -> Class Resolved
-parseClass bstr = convertClass $ decode bstr
+parseClass :: B.ByteString -> Class Direct
+parseClass bstr = classFile2Direct $ decode bstr
-- | Parse class data from file
-parseClassFile :: FilePath -> IO (Class Resolved)
-parseClassFile path = convertClass `fmap` decodeFile path
+parseClassFile :: FilePath -> IO (Class Direct)
+parseClassFile path = classFile2Direct `fmap` decodeFile path
-encodeClass :: (Class Resolved) -> B.ByteString
-encodeClass cls = encode $ classFile cls
+encodeClass :: (Class Direct) -> B.ByteString
+encodeClass cls = encode $ classDirect2File cls
-convertClass :: Class Pointers -> Class Resolved
-convertClass (Class {..}) =
- let pool = constantPoolArray constsPool
+classFile2Direct :: Class File -> Class Direct
+classFile2Direct (Class {..}) =
+ let pool = poolFile2Direct constsPool
superName = className $ pool ! superClass
- in Class {
- magic = 0xCAFEBABE,
- minorVersion = 0,
- majorVersion = 50,
+ d = defaultClass :: Class Direct
+ in d {
constsPoolSize = fromIntegral (M.size pool),
constsPool = pool,
- accessFlags = convertAccess accessFlags,
+ accessFlags = accessFile2Direct accessFlags,
thisClass = className $ pool ! thisClass,
superClass = if superClass == 0 then "" else superName,
interfacesCount = interfacesCount,
interfaces = map (\i -> className $ pool ! i) interfaces,
classFieldsCount = classFieldsCount,
- classFields = map (convertField pool) classFields,
+ classFields = map (fieldFile2Direct pool) classFields,
classMethodsCount = classMethodsCount,
- classMethods = map (convertMethod pool) classMethods,
+ classMethods = map (methodFile2Direct pool) classMethods,
classAttributesCount = classAttributesCount,
- classAttributes = convertAttrs pool classAttributes }
+ classAttributes = attributesFile2Direct pool classAttributes }
-classFile :: Class Resolved -> Class Pointers
-classFile (Class {..}) = Class {
- magic = 0xCAFEBABE,
- minorVersion = 0,
- majorVersion = 50,
+classDirect2File :: Class Direct -> Class File
+classDirect2File (Class {..}) =
+ let d = defaultClass :: Class File
+ in d {
constsPoolSize = fromIntegral (M.size poolInfo + 1),
constsPool = poolInfo,
- accessFlags = access2word16 accessFlags,
+ accessFlags = accessDirect2File accessFlags,
thisClass = force "this" $ poolClassIndex poolInfo thisClass,
superClass = force "super" $ poolClassIndex poolInfo superClass,
interfacesCount = fromIntegral (length interfaces),
interfaces = map (force "ifaces" . poolIndex poolInfo) interfaces,
classFieldsCount = fromIntegral (length classFields),
- classFields = map (fieldInfo poolInfo) classFields,
+ classFields = map (fieldDirect2File poolInfo) classFields,
classMethodsCount = fromIntegral (length classMethods),
- classMethods = map (methodInfo poolInfo) classMethods,
- classAttributesCount = fromIntegral (M.size classAttributes),
- classAttributes = map (attrInfo poolInfo) (M.assocs classAttributes) }
+ classMethods = map (methodDirect2File poolInfo) classMethods,
+ classAttributesCount = fromIntegral $ arsize classAttributes,
+ classAttributes = to (arlist classAttributes) }
where
- poolInfo = toCPInfo constsPool
+ poolInfo = poolDirect2File constsPool
+ to :: [(B.ByteString, B.ByteString)] -> Attributes File
+ to pairs = AP (map (attrInfo poolInfo) pairs)
-toCPInfo :: Pool Resolved -> Pool Pointers
-toCPInfo pool = result
+poolDirect2File :: Pool Direct -> Pool File
+poolDirect2File pool = result
where
result = M.map cpInfo pool
- cpInfo :: Constant Resolved -> Constant Pointers
+ cpInfo :: Constant Direct -> Constant File
cpInfo (CClass name) = CClass (force "class" $ poolIndex result name)
cpInfo (CField cls name) =
CField (force "field a" $ poolClassIndex result cls) (force "field b" $ poolNTIndex result name)
cpInfo (CDouble x) = CDouble x
cpInfo (CNameType n t) =
CNameType (force "name" $ poolIndex result n) (force "type" $ poolIndex result t)
- cpInfo (CUTF8 s) = CUTF8 (fromIntegral $ B.length s) s
- cpInfo (CUnicode s) = CUnicode (fromIntegral $ B.length s) s
+ cpInfo (CUTF8 s) = CUTF8 s
+ cpInfo (CUnicode s) = CUnicode s
-- | Find index of given string in the list of constants
-poolIndex :: (Throws NoItemInPool e) => Pool Pointers -> B.ByteString -> EM e Word16
-poolIndex list name = case findIndex test list of
+poolIndex :: (Throws NoItemInPool e) => Pool File -> B.ByteString -> EM e Word16
+poolIndex list name = case findIndex test (M.elems list) of
Nothing -> throw (NoItemInPool name)
Just i -> return $ fromIntegral $ i+1
where
test _ = False
-- | Find index of given string in the list of constants
-poolClassIndex :: (Throws NoItemInPool e) => Pool Pointers -> B.ByteString -> EM e Word16
-poolClassIndex list name = case findIndex checkString list of
+poolClassIndex :: (Throws NoItemInPool e) => Pool File -> B.ByteString -> EM e Word16
+poolClassIndex list name = case findIndex checkString (M.elems list) of
Nothing -> throw (NoItemInPool name)
- Just i -> case findIndex (checkClass $ fromIntegral $ i+1) list of
+ Just i -> case findIndex (checkClass $ fromIntegral $ i+1) (M.elems list) of
Nothing -> throw (NoItemInPool $ i+1)
Just j -> return $ fromIntegral $ j+1
where
poolNTIndex list x@(NameType n t) = do
ni <- poolIndex list n
ti <- poolIndex list (byteString t)
- case findIndex (check ni ti) list of
+ case findIndex (check ni ti) (M.elems list) of
Nothing -> throw (NoItemInPool x)
Just i -> return $ fromIntegral (i+1)
where
| (ni == n') && (ti == t') = True
check _ _ _ = False
-fieldInfo :: Pool Pointers -> Field Resolved -> Field Pointers
-fieldInfo pool (Field {..}) = Field {
- fieldAccessFlags = access2word16 fieldAccessFlags,
- fieldName = force "field name" $ poolIndex pool fieldName,
- fieldSignature = force "signature" $ poolIndex pool (encode fieldSignature),
- fieldAttributesCount = fromIntegral (M.size fieldAttributes),
- fieldAttributes = map (attrInfo pool) (M.assocs fieldAttributes) }
-
-methodInfo :: Pool Pointers -> Method Resolved -> Method Pointers
-methodInfo pool (Method {..}) = Method {
- methodAccessFlags = access2word16 methodAccessFlags,
- methodName = force "method name" $ poolIndex pool methodName,
- methodSignature = force "method sig" $ poolIndex pool (encode methodSignature),
- methodAttributesCount = fromIntegral (M.size methodAttributes),
- methodAttributes = map (attrInfo pool) (M.assocs methodAttributes) }
-
-attrInfo :: Pool Pointers -> (B.ByteString, B.ByteString) -> Attributes Pointers
+fieldDirect2File :: Pool File -> Field Direct -> Field File
+fieldDirect2File pool (Field {..}) = Field {
+ fieldAccessFlags = accessDirect2File fieldAccessFlags,
+ fieldName = force "field name" $ poolIndex pool fieldName,
+ fieldSignature = force "signature" $ poolIndex pool (encode fieldSignature),
+ fieldAttributesCount = fromIntegral (arsize fieldAttributes),
+ fieldAttributes = to (arlist fieldAttributes) }
+ where
+ to :: [(B.ByteString, B.ByteString)] -> Attributes File
+ to pairs = AP (map (attrInfo pool) pairs)
+
+methodDirect2File :: Pool File -> Method Direct -> Method File
+methodDirect2File pool (Method {..}) = Method {
+ methodAccessFlags = accessDirect2File methodAccessFlags,
+ methodName = force "method name" $ poolIndex pool methodName,
+ methodSignature = force "method sig" $ poolIndex pool (encode methodSignature),
+ methodAttributesCount = fromIntegral (arsize methodAttributes),
+ methodAttributes = to (arlist methodAttributes) }
+ where
+ to :: [(B.ByteString, B.ByteString)] -> Attributes File
+ to pairs = AP (map (attrInfo pool) pairs)
+
+attrInfo :: Pool File -> (B.ByteString, B.ByteString) -> Attribute
attrInfo pool (name, value) = Attribute {
attributeName = force "attr name" $ poolIndex pool name,
attributeLength = fromIntegral (B.length value),
attributeValue = value }
-constantPoolArray :: Pool Pointers -> Pool Resolved
-constantPoolArray ps = pool
+poolFile2Direct :: Pool File -> Pool Direct
+poolFile2Direct ps = pool
where
- pool :: Pool
+ pool :: Pool Direct
pool = M.map convert ps
- n = fromIntegral $ length ps
+ n = fromIntegral $ M.size ps
- convertNameType :: (HasSignature a, Binary (Signature a)) => Word16 -> NameType a
+ convertNameType :: (HasSignature a) => Word16 -> NameType a
convertNameType i =
let (CNameType n s) = pool ! i
in NameType n (decode s)
convert (CLong x) = CLong (fromIntegral x)
convert (CDouble x) = CDouble x
convert (CNameType i j) = CNameType (getString $ pool ! i) (getString $ pool ! j)
- convert (CUTF8 _ bs) = CUTF8 bs
- convert (CUnicode _ bs) = CUnicode bs
+ convert (CUTF8 bs) = CUTF8 bs
+ convert (CUnicode bs) = CUnicode bs
-convertAccess :: AccessFlags Pointers -> AccessFlags Resolved
-convertAccess w = S.fromList $ concat $ zipWith (\i f -> if testBit w i then [f] else []) [0..] $ [
+accessFile2Direct :: AccessFlags File -> AccessFlags Direct
+accessFile2Direct w = S.fromList $ concat $ zipWith (\i f -> if testBit w i then [f] else []) [0..] $ [
ACC_PUBLIC,
ACC_PRIVATE,
ACC_PROTECTED,
ACC_INTERFACE,
ACC_ABSTRACT ]
-access2word16 :: AccessFlags Resolved -> AccessFlags Pointers
-access2word16 fs = bitsOr $ map toBit $ S.toList fs
+accessDirect2File :: AccessFlags Direct -> AccessFlags File
+accessDirect2File fs = bitsOr $ map toBit $ S.toList fs
where
bitsOr = foldl (.|.) 0
toBit f = 1 `shiftL` (fromIntegral $ fromEnum f)
-convertField :: Pool Resolved -> Field Pointers -> Field Resolved
-convertField pool (Field {..}) = Field {
- fieldAccessFlags = convertAccess fieldAccessFlags,
+fieldFile2Direct :: Pool Direct -> Field File -> Field Direct
+fieldFile2Direct pool (Field {..}) = Field {
+ fieldAccessFlags = accessFile2Direct fieldAccessFlags,
fieldName = getString $ pool ! fieldName,
fieldSignature = decode $ getString $ pool ! fieldSignature,
- fieldAttributes = convertAttrs pool fieldAttributes }
+ fieldAttributesCount = fromIntegral (apsize fieldAttributes),
+ fieldAttributes = attributesFile2Direct pool fieldAttributes }
-convertMethod :: Pool Resolved -> Method Pointers -> Method Resolved
-convertMethod pool (Method {..}) = Method {
- methodAccessFlags = convertAccess methodAccessFlags,
+methodFile2Direct :: Pool Direct -> Method File -> Method Direct
+methodFile2Direct pool (Method {..}) = Method {
+ methodAccessFlags = accessFile2Direct methodAccessFlags,
methodName = getString $ pool ! methodName,
methodSignature = decode $ getString $ pool ! methodSignature,
- methodAttributes = convertAttrs pool methodAttributes }
+ methodAttributesCount = fromIntegral (apsize methodAttributes),
+ methodAttributes = attributesFile2Direct pool methodAttributes }
-convertAttrs :: Pool Resolved -> Attributes Pointers -> Attributes Resolved
-convertAttrs pool attrs = M.fromList $ map go attrs
+attributesFile2Direct :: Pool Direct -> Attributes File -> Attributes Direct
+attributesFile2Direct pool (AP attrs) = AR (M.fromList $ map go attrs)
where
+ go :: Attribute -> (B.ByteString, B.ByteString)
go (Attribute {..}) = (getString $ pool ! attributeName,
attributeValue)
-- | Try to get class method by name
-methodByName :: Class Resolved -> B.ByteString -> Maybe (Method Resolved)
+methodByName :: Class Direct -> B.ByteString -> Maybe (Method Direct)
methodByName cls name =
find (\m -> methodName m == name) (classMethods cls)
-- | Try to get object attribute by name
-attrByName :: (HasAttributes a) => a Resolved -> B.ByteString -> Maybe B.ByteString
-attrByName x name = M.lookup name (attributes x)
+attrByName :: (HasAttributes a) => a Direct -> B.ByteString -> Maybe B.ByteString
+attrByName x name =
+ let (AR m) = attributes x
+ in M.lookup name m
-- | Try to get Code for class method (no Code for interface methods)
-methodCode :: Class Resolved
+methodCode :: Class Direct
-> B.ByteString -- ^ Method name
-> Maybe B.ByteString
methodCode cls name = do
projects / hs-java.git / blobdiff