protected override Expression VisitMethodCall(MethodCallExpression node)
{
if (node.Method.DeclaringType == typeof(DbFragmentExtensions))
{
if (node.Method.Name == nameof(DbFragmentExtensions.Value))
{
return(ToObject(node, node.Method.GetGenericArguments()[0]));
}
else if (node.Method.Name == nameof(DbFragmentExtensions.NullValue))
{
return(ToObject(node, typeof(Nullable <>).MakeGenericType(node.Method.GetGenericArguments()[0])));
}
else if (node.Method.Name == nameof(DbFragmentExtensions.Server))
{
var dbFragment = FindDbFragment(node.Arguments[0].Type);
if (dbFragment != null)
{
var dbFragmentValue = Expression.Lambda <Func <IDbFragment> >(node.Arguments[0]).Compile().Invoke();
var fieldName = builder.NextFieldName();
columns.Add(fieldName, dbFragmentValue);
}
}
}
return(base.VisitMethodCall(node));
}