/// <summary>
/// Visits a collection start.
/// </summary>
/// <param name="collection">The collection start to visit.</param>
protected override ODataPayloadElement VisitCollectionStart(ODataCollectionStart collection)
{
ExceptionUtilities.CheckArgumentNotNull(collection, "collection");
// NOTE the Taupo OM does not currently support heterogenous collections; we determine the
// type of the collection by looking at the first non-null item
ODataCollectionItemsObjectModelAnnotation itemsAnnotation = collection.GetAnnotation <ODataCollectionItemsObjectModelAnnotation>();
ExceptionUtilities.Assert(itemsAnnotation != null, "itemsAnnotation != null");
// NOTE we assume that it is a primitive collection; if we find a collection of only null items we treat it as primitive
bool isComplexCollection = false;
foreach (object item in itemsAnnotation)
{
if (item != null)
{
isComplexCollection = item is ODataComplexValue;
break;
}
}
if (isComplexCollection)
{
ComplexInstanceCollection complexCollection = PayloadBuilder.ComplexCollection(collection.Name);
foreach (object item in itemsAnnotation)
{
ComplexInstance complexInstance = item == null
? new ComplexInstance(null, /*isNull*/ true)
: (ComplexInstance)this.Visit((ODataComplexValue)item);
complexCollection.Add(complexInstance);
}
return(complexCollection);
}
else
{
PrimitiveCollection primitiveCollection = PayloadBuilder.PrimitiveCollection(collection.Name);
foreach (object item in itemsAnnotation)
{
PrimitiveValue primitiveValue = (PrimitiveValue)this.Visit(item);
primitiveCollection.Add(primitiveValue);
}
return(primitiveCollection);
}
}
/// <summary>
/// Visits a collection start.
/// </summary>
/// <param name="collection">The collection start to visit.</param>
protected override ODataPayloadElement VisitCollectionStart(ODataCollectionStart collection)
{
ExceptionUtilities.CheckArgumentNotNull(collection, "collection");
// NOTE the Taupo OM does not currently support heterogenous collections; we determine the
// type of the collection by looking at the first non-null item
ODataCollectionItemsObjectModelAnnotation itemsAnnotation = collection.GetAnnotation <ODataCollectionItemsObjectModelAnnotation>();
ExceptionUtilities.Assert(itemsAnnotation != null, "itemsAnnotation != null");
PrimitiveCollection primitiveCollection = PayloadBuilder.PrimitiveCollection(collection.Name);
foreach (object item in itemsAnnotation)
{
PrimitiveValue primitiveValue = (PrimitiveValue)this.Visit(item);
primitiveCollection.Add(primitiveValue);
}
return(primitiveCollection);
}