private Expression GetItemNameExpression(ItemNode itemNode)
{
Expression nameExpression;
if (itemNode.HasFlag(NodeFlags.Source))
{
nameExpression = Expression.Property(Expression.Property(this.args.Source, nameof(IField.Identity)), nameof(FieldIdentity.Name));
}
else if (itemNode.List != null)
{
Expression enumerator = this.GetEnumeratorExpression(itemNode.List);
Expression list = this.GetFieldExpression(itemNode.List);
Expression listName = Expression.Property(Expression.Property(list, nameof(IField.Identity)), nameof(FieldIdentity.Name));
Expression itemName = Expression.Constant(itemNode.Metadata.Identity.Notation.Path(itemNode.List.Metadata.Identity.Name, itemNode.Metadata.Identity.Name));
Expression combined = this.GetNotationCombine(listName, itemName);
Expression index = Expression.Property(enumerator, nameof(IndexedEnumerator <object> .Index));
Expression indexed = this.GetNotationIndex(combined, index);
nameExpression = indexed;
}
else
{
throw new InvalidOperationException();
}
return(nameExpression);
}
