/// <summary>
/// Reads a value from the message reader.
/// </summary>
/// <param name="expectedClientType">The expected client type being materialized into.</param>
/// <param name="expectedReaderType">The expected type for the underlying reader.</param>
protected override void ReadWithExpectedType(IEdmTypeReference expectedClientType, IEdmTypeReference expectedReaderType)
{
if (!expectedClientType.IsCollection())
{
throw new DataServiceClientException(DSClient.Strings.AtomMaterializer_TypeShouldBeCollectionError(expectedClientType.FullName()));
}
Type underlyingExpectedType = Nullable.GetUnderlyingType(this.ExpectedType) ?? this.ExpectedType;
Debug.Assert(WebUtil.IsCLRTypeCollection(underlyingExpectedType, this.MaterializerContext.Model) ||
(SingleResult.HasValue && !SingleResult.Value), "expected type must be collection or single result must be false");
// We are here for two cases:
// (1) Something like Execute<ICollection<T>>, in which case the underlyingExpectedType is ICollection<T>
// (2) Execute<T> with the bool singleValue = false, in which case underlyingExpectedType is T
Type collectionItemType = underlyingExpectedType;
Type collectionICollectionType = ClientTypeUtil.GetImplementationType(underlyingExpectedType, typeof(ICollection <>));
if (collectionICollectionType != null)
{
// Case 1 : Something like Execute<ICollection<T>>, in which case the underlyingExpectedType is ICollection<T>
collectionItemType = collectionICollectionType.GetGenericArguments()[0];
}
else
{
// Case 2 : Execute<T> with the bool singleValue = false, in which case underlyingExpectedType is T
collectionICollectionType = typeof(ICollection <>).MakeGenericType(new Type[] { collectionItemType });
}
Type clrCollectionType = WebUtil.GetBackingTypeForCollectionProperty(collectionICollectionType);
object collectionInstance = this.CollectionValueMaterializationPolicy.CreateCollectionInstance((IEdmCollectionTypeReference)expectedClientType, clrCollectionType);
// Enumerator over our collection reader was created, then ApplyDataCollections was refactored to
// take an enumerable instead of a ODataCollectionValue. Enumerator is being used as a bridge
ODataCollectionReader collectionReader = messageReader.CreateODataCollectionReader();
NonEntityItemsEnumerable collectionEnumerable = new NonEntityItemsEnumerable(collectionReader);
bool isElementNullable = expectedClientType.AsCollection().ElementType().IsNullable;
this.CollectionValueMaterializationPolicy.ApplyCollectionDataValues(
collectionEnumerable,
null /*wireTypeName*/,
collectionInstance,
collectionItemType,
ClientTypeUtil.GetAddToCollectionDelegate(collectionICollectionType),
isElementNullable);
this.currentValue = collectionInstance;
}
/// <summary>
/// Reads a value from the message reader.
/// </summary>
/// <param name="expectedClientType">The expected client type being materialized into.</param>
/// <param name="expectedReaderType">The expected type for the underlying reader.</param>
protected override void ReadWithExpectedType(IEdmTypeReference expectedClientType, IEdmTypeReference expectedReaderType)
{
if (!expectedClientType.IsCollection())
{
throw new DataServiceClientException(DSClient.Strings.AtomMaterializer_TypeShouldBeCollectionError(expectedClientType.FullName()));
}
Type underlyingExpectedType = Nullable.GetUnderlyingType(this.ExpectedType) ?? this.ExpectedType;
bool isClrCollection = WebUtil.IsCLRTypeCollection(underlyingExpectedType, this.MaterializerContext.Model);
Debug.Assert(isClrCollection || (SingleResult.HasValue && !SingleResult.Value), "expected type must be collection or single result must be false");
// We are here for two cases:
// (1) Something like Execute<ICollection<T>>, in which case the underlyingExpectedType is ICollection<T>
// (2) Execute<T> with the bool singleValue = false, in which case underlyingExpectedType is T
Type collectionItemType = underlyingExpectedType;
Type collectionICollectionType = ClientTypeUtil.GetImplementationType(underlyingExpectedType, typeof(ICollection<>));
if (collectionICollectionType != null)
{
// Case 1 : Something like Execute<ICollection<T>>, in which case the underlyingExpectedType is ICollection<T>
collectionItemType = collectionICollectionType.GetGenericArguments()[0];
}
else
{
// Case 2 : Execute<T> with the bool singleValue = false, in which case underlyingExpectedType is T
collectionICollectionType = typeof(ICollection<>).MakeGenericType(new Type[] { collectionItemType });
}
Type clrCollectionType = WebUtil.GetBackingTypeForCollectionProperty(collectionICollectionType, collectionItemType);
object collectionInstance = this.CollectionValueMaterializationPolicy.CreateCollectionInstance((IEdmCollectionTypeReference)expectedClientType, clrCollectionType);
// Enumerator over our collection reader was created, then ApplyDataCollections was refactored to
// take an enumerable instead of a ODataCollectionValue. Enumerator is being used as a bridge
ODataCollectionReader collectionReader = messageReader.CreateODataCollectionReader();
NonEntityItemsEnumerable collectionEnumerable = new NonEntityItemsEnumerable(collectionReader);
bool isElementNullable = expectedClientType.AsCollection().ElementType().IsNullable;
this.CollectionValueMaterializationPolicy.ApplyCollectionDataValues(
collectionEnumerable,
null /*wireTypeName*/,
collectionInstance,
collectionItemType,
ClientTypeUtil.GetAddToCollectionDelegate(collectionICollectionType),
isElementNullable);
this.currentValue = collectionInstance;
}
