{--
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.Field.ID where
{
	import Foreign.JavaVM.VM.StringPtr;
	import Foreign.JavaVM.VM.Ref;
	import Foreign.JavaVM.VM.Types;
	import Foreign.JavaVM.Raw;
	import Platform.JavaVM;
	import Data.Nothing;

	type VMStaticFieldID	= RawStaticFieldID;
	type VMFieldID			= RawFieldID;
	
	instance (Monad m) => MonadHasNothing m VMStaticFieldID where
	{
		getNothing = return nothing;
		getIsNothing a = return (isNothing a);
	};
	
	instance HasNothing VMStaticFieldID where
	{
		nothing = (MkRawStaticFieldID nothing);
		isNothing (MkRawStaticFieldID a) = isNothing a;
	};
	
	instance (Monad m) => MonadHasNothing m VMFieldID where
	{
		getNothing = return nothing;
		getIsNothing a = return (isNothing a);
	};
	
	instance HasNothing VMFieldID where
	{
		nothing = (MkRawFieldID nothing);
		isNothing (MkRawFieldID a) = isNothing a;
	};
	
	vmGetStaticFieldID :: VMClassRef -> FieldNameType -> VM VMStaticFieldID;
	vmGetStaticFieldID jClass (MkMemberNameType name vtype) =
		withJString name (\pname ->
			withJString (valueTypeSig vtype) (\psig ->
				withVMRefRawGlobal jClass (\rawClass ->
					rawGetStaticFieldID ?jvmenv rawClass pname psig)));

	vmGetFieldID :: VMClassRef -> FieldNameType -> VM VMFieldID;
	vmGetFieldID jClass (MkMemberNameType name vtype) =
		withJString name (\pname ->
			withJString (valueTypeSig vtype) (\psig ->
				withVMRefRawGlobal jClass (\rawClass ->
					rawGetFieldID ?jvmenv rawClass pname psig)));
}