protected T GetEnumeratorHelper <T>(Func <T> getEnumerator) where T : IEnumerator
{
if (getEnumerator == null)
{
throw new ArgumentNullException("getEnumerator");
}
if (this.Results.Context != null)
{
bool?singleResult = this.Query.QueryComponents(this.Results.Context.MaxProtocolVersion).SingleResult;
if (singleResult.HasValue && !singleResult.Value)
{
IEnumerator enumerator = this.Results.GetEnumerator();
if (enumerator.MoveNext())
{
object current = enumerator.Current;
ICollection is2 = current as ICollection;
if (is2 == null)
{
throw new DataServiceClientException(Strings.AtomMaterializer_CollectionExpectedCollection(current.GetType().ToString()));
}
return((T)is2.GetEnumerator());
}
}
}
return(getEnumerator());
}
/// <summary>Gets the enumeration helper for the <see cref="T:System.Data.Services.Client.QueryOperationResponse" />.</summary>
/// <param name="getEnumerator">The enumerator.</param>
/// <typeparam name="T">The generic type.</typeparam>
/// <returns>An enumerator to enumerator through the results.</returns>
protected T GetEnumeratorHelper <T>(Func <T> getEnumerator) where T : IEnumerator
{
if (getEnumerator == null)
{
throw new ArgumentNullException("getEnumerator");
}
if (this.Results.Context != null)
{
bool?singleResult = this.Query.QueryComponents(this.Results.Context.Model).SingleResult;
if (singleResult.HasValue && !singleResult.Value)
{
// Case: collection of complex or primitive.
// We materialize the entire collection now, and give them the inner enumerator instead
IEnumerator enumerator = this.Results.GetEnumerator();
if (enumerator.MoveNext())
{
object innerObject = enumerator.Current;
ICollection materializedCollection = innerObject as ICollection;
if (materializedCollection == null)
{
throw new DataServiceClientException(Strings.AtomMaterializer_CollectionExpectedCollection(innerObject.GetType().ToString()));
}
Debug.Assert(!enumerator.MoveNext(), "MaterializationEvents of top level collection expected one result of ICollection<>, but found at least 2 results");
return((T)materializedCollection.GetEnumerator());
}
else
{
Debug.Assert(false, "MaterializationEvents of top level collection expected one result of ICollection<>, but found at least no results.");
}
}
}
return(getEnumerator());
}
