public override SyntaxNode VisitInvocationExpression(InvocationExpressionSyntax node)
{
var expression = node.Expression.ToString();
if (expression.StartsWith("results.") == false || expression.EndsWith(".GroupBy") == false)
{
return(base.VisitInvocationExpression(node));
}
var groupByLambda = node.ArgumentList.DescendantNodes(x => true)
.FirstOrDefault(x => x.IsKind(SyntaxKind.SimpleLambdaExpression)) as SimpleLambdaExpressionSyntax;
if (groupByLambda == null)
{
throw new InvalidOperationException("Could not extract arguments from group by expression");
}
var argument = groupByLambda.Parent as ArgumentSyntax;
if (argument == null)
{
throw new InvalidOperationException("Could not extract arguments from group by expression");
}
var arguments = argument.Parent as ArgumentListSyntax;
if (arguments == null)
{
throw new InvalidOperationException("Could not extract arguments from group by expression");
}
if (arguments.Arguments.Count != 1)
{
throw new InvalidOperationException("Incorrect number of arguments in group by expression");
}
var singleGroupByField = groupByLambda.Body as MemberAccessExpressionSyntax;
var multipleGroupByFields = groupByLambda.Body as AnonymousObjectCreationExpressionSyntax;
var literalGroupByField = groupByLambda.Body as LiteralExpressionSyntax;
if (singleGroupByField != null)
{
GroupByFields = new[] { RewritersHelper.ExtractField(singleGroupByField) };
}
else if (multipleGroupByFields != null)
{
GroupByFields = RewritersHelper.ExtractFields(multipleGroupByFields, retrieveOriginal: true, nestFields: true).ToArray();
}
else if (literalGroupByField != null)
{
GroupByFields = new CompiledIndexField[0];
}
else
{
throw new InvalidOperationException("Could not extract group by fields");
}
return(node);
}
public IEnumerable <(string Key, object Value, CompiledIndexField GroupByField, bool IsGroupByField)> GetPropertiesInOrder(object target)
{
if (!(target is ObjectInstance oi))
{
throw new ArgumentException($"JintPropertyAccessor.GetPropertiesInOrder is expecting a target of type ObjectInstance but got one of type {target.GetType().Name}.");
}
foreach (var property in oi.GetOwnProperties())
{
CompiledIndexField field = null;
var isGroupByField = _groupByFields?.TryGetValue(new SimpleField(property.Key), out field) ?? false;
yield return(property.Key, GetValue(property.Value.Value), field, isGroupByField);
}
}