/// <summary>
/// Handler for fetching dynamic members. In this case, fetching elements.
/// No matter what, a <see cref="DynamicXElement"/> is returned.
/// </summary>
/// <param name="binder"></param>
/// <param name="result"></param>
/// <returns>DynamicXElement</returns>
public override bool TryGetMember(GetMemberBinder binder, out object result)
{
if (ActualElement == null)
{
result = new DynamicXElement();
return(true);
}
var elements = GetElements(ActualElement, binder.Name).ToArray();
var elementCount = elements.Count();
if (elementCount == 0)
{
result = new DynamicXElement();
return(true);
}
if (elementCount == 1)
{
var e = elements.First();
result = e.HasElements || e.HasAttributes
? new DynamicXElement(e)
: (object)e.Value;
return(true);
}
result = elements.Select(e => new DynamicXElement(e));
return(true);
}
/// <summary>
/// Handler for fetching indexes. This is implemented to fetch an element whose attribute
/// with name <see cref="IndexAttribute"/> matches this index value.
/// </summary>
/// <param name="binder"></param>
/// <param name="indexes"></param>
/// <param name="result"></param>
/// <returns>String</returns>
/// <example>A list of elements called "items" with each "item" attribute having an attribute "id"
/// could be fetched like: Items["email"] to fetch an item with @id="email"</example>
public override bool TryGetIndex(GetIndexBinder binder, object[] indexes, out object result)
{
if (ActualElement == null)
{
result = null;
return(true);
}
var requestedName = indexes[0] as string;
var element = ActualElement
.Elements()
.Where(n => n.HasAttributes)
.Where(n => n.Attribute(IndexAttribute) != null)
.Where(n => NameMatch(requestedName, n.Attribute(IndexAttribute).Value))
.ToArray();
if (element.Length == 0)
{
result = new DynamicXElement();
return(true);
}
if (element.Length == 1)
{
result = new DynamicXElement(element.First());
return(true);
}
result = null;
return(false);
}
