/// <summary>
/// Generates invoker methods.
/// </summary>
/// <param name="grainType">The grain type.</param>
/// <param name="onEncounteredType">
/// The callback which is invoked when a type is encountered.
/// </param>
/// <returns>Invoker methods for the provided grain type.</returns>
private static MemberDeclarationSyntax[] GenerateInvokeMethods(Type grainType, Action <Type> onEncounteredType)
{
var baseReference = SF.BaseExpression();
var methods = GrainInterfaceUtils.GetMethods(grainType);
var members = new List <MemberDeclarationSyntax>();
foreach (var method in methods)
{
onEncounteredType(method.ReturnType);
var methodId = GrainInterfaceUtils.ComputeMethodId(method);
var methodIdArgument =
SF.Argument(SF.LiteralExpression(SyntaxKind.NumericLiteralExpression, SF.Literal(methodId)));
// Construct a new object array from all method arguments.
var parameters = method.GetParameters();
var body = new List <StatementSyntax>();
foreach (var parameter in parameters)
{
onEncounteredType(parameter.ParameterType);
if (typeof(IGrainObserver).IsAssignableFrom(parameter.ParameterType))
{
body.Add(
SF.ExpressionStatement(
CheckGrainObserverParamInternalExpression.Invoke()
.AddArgumentListArguments(SF.Argument(parameter.Name.ToIdentifierName()))));
}
}
// Get the parameters argument value.
ExpressionSyntax args;
if (parameters.Length == 0)
{
args = SF.LiteralExpression(SyntaxKind.NullLiteralExpression);
}
else
{
args =
SF.ArrayCreationExpression(typeof(object).GetArrayTypeSyntax())
.WithInitializer(
SF.InitializerExpression(SyntaxKind.ArrayInitializerExpression)
.AddExpressions(parameters.Select(GetParameterForInvocation).ToArray()));
}
var options = GetInvokeOptions(method);
// Construct the invocation call.
if (method.ReturnType == typeof(void))
{
var invocation = SF.InvocationExpression(baseReference.Member("InvokeOneWayMethod"))
.AddArgumentListArguments(methodIdArgument)
.AddArgumentListArguments(SF.Argument(args));
if (options != null)
{
invocation = invocation.AddArgumentListArguments(options);
}
body.Add(SF.ExpressionStatement(invocation));
}
//else if (GrainInterfaceUtils.IsReactiveComputationType(method.ReturnType))
//{
// var resultTypeArgument =
// SF.Argument(SF.LiteralExpression(SyntaxKind.NumericLiteralExpression, SF.Literal(methodId)));
// var returnType = method.ReturnType.GenericTypeArguments[0];
// args =
// SF.ArrayCreationExpression(typeof(object).GetArrayTypeSyntax())
// .WithInitializer(
// SF.InitializerExpression(SyntaxKind.ArrayInitializerExpression)
// .AddExpressions(parameters.Select(GetParameterForInvocation).ToArray()));
// var invocation =
// SF.InvocationExpression(baseReference.Member("CreateReactiveComputation", returnType.GenericTypeArguments[0]))
// .AddArgumentListArguments(methodIdArgument)
// .AddArgumentListArguments(SF.Argument(args));
// if (options != null)
// {
// invocation = invocation.AddArgumentListArguments(options);
// }
// body.Add(SF.ReturnStatement(invocation));
//}
//else if (grainType is IReactiveGrain)
//{
// var returnType = (method.ReturnType == typeof(Task))
// ? typeof(object)
// : method.ReturnType.GenericTypeArguments[0];
// var invocation =
// SF.InvocationExpression(baseReference.Member("InvokeMethodAsync", returnType))
// .AddArgumentListArguments(methodIdArgument)
// .AddArgumentListArguments(SF.Argument(args));
// if (options != null)
// {
// invocation = invocation.AddArgumentListArguments(options);
// }
// body.Add(SF.ReturnStatement(invocation));
//}
else if (GrainInterfaceUtils.IsTaskType(method.ReturnType))
{
var returnType = (method.ReturnType == typeof(Task))
? typeof(object)
: method.ReturnType.GenericTypeArguments[0];
var invocation =
SF.InvocationExpression(baseReference.Member("InvokeMethodAsync", returnType))
.AddArgumentListArguments(methodIdArgument)
.AddArgumentListArguments(SF.Argument(args));
if (options != null)
{
invocation = invocation.AddArgumentListArguments(options);
}
body.Add(SF.ReturnStatement(invocation));
}
members.Add(method.GetDeclarationSyntax().AddBodyStatements(body.ToArray()));
}
return(members.ToArray());
}
