public static List <Type> ExplodeSimpleMethodBase(SimpleMethodBase methodBase, out Type resType)
{
var method = methodBase as SimpleMethodInfo;
if (method != null)
{
return(ExplodeSimpleMethodInfo(method, out resType));
}
else
{
var ctor = methodBase as SimpleConstructorInfo;
if (ctor != null)
{
return(ExplodeSimpleConstructorInfo(ctor, out resType));
}
else
{
throw new InvalidOperationException("unrecognised method base");
}
}
}
// Called from body generated for an imported constructor to tie the managed and unmanaged objects together
public void CompleteConstruction(SimpleMethodBase methodBase, object obj, JSContext ctxt)
{
var type = methodBase.DeclaringType;
var ops = FindInteropOps(type);
ops.BindUnmanagedAndManagedInstances(obj, ctxt);
}
public static List<Type> ExplodeSimpleMethodBase(SimpleMethodBase methodBase, out Type resType)
{
var method = methodBase as SimpleMethodInfo;
if (method != null)
return ExplodeSimpleMethodInfo(method, out resType);
else
{
var ctor = methodBase as SimpleConstructorInfo;
if (ctor != null)
return ExplodeSimpleConstructorInfo(ctor, out resType);
else
throw new InvalidOperationException("unrecognised method base");
}
}
// ----------------------------------------------------------------------
// Imported and Exported methods
// ----------------------------------------------------------------------
// Called from body of imported method to redirect to imported method. Method is (possibly an instance
// of a polymorphic method) in (possibly an instance of a higher kinded) type.
// If method is a constructor:
// - the uninitialized managed object has already been created, but is NOT passed as first
// argument in args, and is not represented in argTypes.
// - function on unmanaged side does not expect any 'this' argument, but will instead create, initialize
// and return the new unmanaged object.
// - we return a JSContext for the newly created unamanged object
// - the calling ctor must then call the best-matching 'importing constructor' to initialize the
// managed object, then call CompleteConstruction to associate the managed and unmanaged objects.
public object CallImportedMethod(SimpleMethodBase methodBase, string script, params object[] args)
{
var resType = default(Type);
var argTypes = TypeInfo.ExplodeSimpleMethodBase(methodBase, out resType);
var argInteropOps = new InteropOps[argTypes.Count];
for (var i = 0; i < argTypes.Count; i++)
argInteropOps[i] = FindInteropOps(argTypes[i]);
var resInteropOps = resType == null ? null : FindInteropOps(resType);
if (args.Length != argInteropOps.Length)
throw new InvalidOperationException("mismatched method arity");
// First pass: check if we need to create any Proxied or Keyed counterparts for arguments, and/or
// bind any exported instance methods into unmanaged counterpart.
for (var i = 0; i < args.Length; i++)
{
if (argInteropOps[i].NeedsCreate(args[i]))
Eval(argInteropOps[i].AppendCreate, sp => argInteropOps[i].BindCreatedInstance(sp, args[i]));
if (argInteropOps[i].NeedsInstanceExportsBound(args[i]))
BindExportedMethodsOfType(args[i].GetType(), args[i]);
}
// Second pass: export args, make call, import result
Action<StringBuilder, Dictionary<Type, int>> makeCall = (sb, toBeLoaded) =>
{
sb.Append('(');
sb.Append(script);
sb.Append(")(");
for (var i = 0; i < args.Length; i++)
{
if (i > 0)
sb.Append(',');
argInteropOps[i].AppendExport
(sb, toBeLoaded, args[i]);
}
sb.Append(')');
if (resType == null)
sb.Append(';');
};
if (resType == null)
return Eval(makeCall, null);
else
return Eval
(resInteropOps.WrapImport(makeCall),
sp =>
{
sp.SkipWS();
if (methodBase is SimpleConstructorInfo)
return resInteropOps.ContextForUnmanagedInstance(sp);
else
return resInteropOps.Import(sp);
});
}
