{--
JVM-Bridge -- bridge from FP languages and others to the Java VM
Copyright (C) 2001 Ashley Yakeley <ashley@semantic.org>

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
--}

module Foreign.JavaVM.VM.Method(vmGetStaticMethod,vmGetMethod) where
{
	import Foreign.JavaVM.VM.Method.Call;
	import Foreign.JavaVM.VM.StringPtr;
	import Foreign.JavaVM.VM.Witness;
	import Foreign.JavaVM.VM.Ref;
	import Foreign.JavaVM.VM.Types;
	import Foreign.JavaVM.Raw;
	import Platform.JavaVM;
	import Data.Nothing;
	import Data.Witness;
	
	instance (Monad m) => MonadHasNothing m RawStaticMethodID where
	{
		getNothing = return nothing;
		getIsNothing a = return (isNothing a);
	};
	
	instance HasNothing RawStaticMethodID where
	{
		nothing = (MkRawStaticMethodID nothing);
		isNothing (MkRawStaticMethodID a) = isNothing a;
	};
	
	instance (Monad m) => MonadHasNothing m RawMethodID where
	{
		getNothing = return nothing;
		getIsNothing a = return (isNothing a);
	};
	
	instance HasNothing RawMethodID where
	{
		nothing = (MkRawMethodID nothing);
		isNothing (MkRawMethodID a) = isNothing a;
	};
	
	vmGetStaticMethodID :: VMClassRef -> MethodNameType -> VM RawStaticMethodID;
	vmGetStaticMethodID jClass (MkMemberNameType name ftype) =
		withJString name (\pname ->
			withJString (functionTypeSig ftype) (\psig ->
				withVMRefRawGlobal jClass (\rawClass ->
					rawGetStaticMethodID ?jvmenv rawClass pname psig)));

	vmGetMethodID :: VMClassRef -> MethodNameType -> VM RawMethodID;
	vmGetMethodID jClass (MkMemberNameType name ftype) =
		withJString name (\pname ->
			withJString (functionTypeSig ftype) (\psig ->
				withVMRefRawGlobal jClass (\rawClass ->
					rawGetMethodID ?jvmenv rawClass pname psig)));
	
	vmGetStaticMethod :: (Is VMReturnType t) => VMClassRef -> MethodNameType -> VM (VMClassRef -> [Any VMType] -> IO t);
	vmGetStaticMethod jClass nt = do
	{
		mid <- vmGetStaticMethodID jClass nt;
		if (isNothing mid)
		 then fail ("static method "++(show nt)++" not found")
		 else return (vmCallStaticMethod mid);
	};
	
	vmGetMethod :: (Is VMReturnType t) => VMClassRef -> MethodNameType -> VM (Maybe VMClassRef -> VMRef -> [Any VMType] -> IO t);
	vmGetMethod jClass nt = do
	{
		mid <- vmGetMethodID jClass nt;
		if (isNothing mid)
		 then fail ("method "++(show nt)++" not found")
		 else return (vmCallMethod mid);
	};
}