protected override Expression VisitMemberAccess(MemberExpression node)
{
if (node.CheckNotNull(nameof(node)).Expression?.NodeType == ExpressionType.Constant)
{
var member = node.Member;
if (member.MemberType == MemberTypes.Property &&
member.DeclaringType?.IsGenericType == true &&
member.DeclaringType?.Type.GetGenericTypeDefinition() == typeof(VariableQueryArgument <>))
{
var instanceExpression = (ConstantExpression)(Visit(node.Expression) ?? throw new InvalidOperationException("Visit must not return null for non null value."));
PropertyInfo propertyInfo;
if (instanceExpression.Value is VariableQueryArgument)
{
propertyInfo = QueryArgumentValuePropertyInfo;
}
else if (instanceExpression.Value is VariableQueryArgumentList)
{
propertyInfo = QueryArgumentValueListPropertyInfo;
}
else
{
throw new RemoteLinqException($"Expected instance expression of type {nameof(VariableQueryArgument)} {nameof(VariableQueryArgumentList)} but got '{instanceExpression.Value?.GetType().FullName ?? "null"}'");
}
return(new MemberExpression(instanceExpression, propertyInfo));
}
}
return(base.VisitMemberAccess(node));
}
protected override Expression VisitMemberAccess(MemberExpression node)
{
var member = node.CheckNotNull(nameof(node)).Member;
if (member.MemberType == MemberTypes.Property &&
(string.Equals(member.DeclaringType?.FullName, typeof(VariableQueryArgument).FullName, StringComparison.Ordinal) ||
string.Equals(member.DeclaringType?.FullName, typeof(VariableQueryArgumentList).FullName, StringComparison.Ordinal)) &&
Visit(node.Expression) is ConstantExpression instanceExpression)
{
var instanceType = instanceExpression.Type;
if (instanceType.IsGenericType && instanceType.Type.GetGenericTypeDefinition() == typeof(VariableQueryArgument <>))
{
var valueType = instanceType.GenericArguments.Single();
var valuePropertyInfo = new PropertyInfo(nameof(VariableQueryArgument.Value), valueType, instanceType);
return(new MemberExpression(instanceExpression, valuePropertyInfo));
}
}
return(base.VisitMemberAccess(node));
}