/// <summary>
/// Visits the children of the given payload element and replaces it with a copy if any child changes
/// </summary>
/// <param name="payloadElement">The payload element to potentially replace</param>
/// <returns>The original element or a copy to replace it with</returns>
public virtual ODataPayloadElement Visit(PrimitiveProperty payloadElement)
{
ExceptionUtilities.CheckArgumentNotNull(payloadElement, "payloadElement");
var replacedValue = this.Recurse(payloadElement.Value) as PrimitiveValue;
ExceptionUtilities.CheckObjectNotNull(replacedValue, "Replaced value was null or wrong type");
if (!this.ShouldReplace(payloadElement.Value, replacedValue))
{
return(payloadElement);
}
return(payloadElement.ReplaceWith(new PrimitiveProperty(payloadElement.Name, replacedValue)));
}
/// <summary>
/// Normalizes primitive properties, potentially replacing them with collections if the metadata indicates the payload is from a service operation
/// </summary>
/// <param name="payloadElement">The payload element to potentially replace</param>
/// <returns>The original element or a copy to replace it with</returns>
public override ODataPayloadElement Visit(PrimitiveProperty payloadElement)
{
var replaced = base.Visit(payloadElement);
if (replaced.ElementType == ODataPayloadElementType.PrimitiveProperty)
{
payloadElement = (PrimitiveProperty)replaced;
// if the payload looks like
// <Foo />
// then it will be deserialized as a primitive property, when it could be an empty collection
//
if (this.ShouldReplaceWithCollection(payloadElement, payloadElement.Value.IsNull, payloadElement.Value.FullTypeName))
{
// if the value is an empty string
var stringValue = payloadElement.Value.ClrValue as string;
if (stringValue != null && stringValue.Length == 0)
{
// get the element data type. Note that this must succeed based on the checks performed earlier
var dataType = ((CollectionDataType)payloadElement.Annotations.OfType <DataTypeAnnotation>().Single().DataType).ElementDataType;
// determine whether to return a complex or primitive collection based on the data type
ODataPayloadElementCollection collection;
if (dataType is PrimitiveDataType)
{
collection = new PrimitiveCollection();
}
else
{
ExceptionUtilities.Assert(dataType is ComplexDataType, "Data type was neither primitive nor complex");
collection = new ComplexInstanceCollection();
}
// return the replacement
return(payloadElement
.ReplaceWith(collection)
.WithAnnotations(new CollectionNameAnnotation()
{
Name = payloadElement.Name
}));
}
}
}
return(replaced);
}
/// <summary>
/// Normalizes primitive properties, potentially replacing them with collections if the metadata indicates the payload is from a service operation
/// </summary>
/// <param name="payloadElement">The payload element to potentially replace</param>
/// <returns>The original element or a copy to replace it with</returns>
public override ODataPayloadElement Visit(PrimitiveProperty payloadElement)
{
var replaced = base.Visit(payloadElement);
if (replaced.ElementType == ODataPayloadElementType.PrimitiveProperty)
{
payloadElement = (PrimitiveProperty)replaced;
// if the payload looks like
// <Foo />
// then it will be deserialized as a primitive property, when it could be an empty collection
//
if (this.ShouldReplaceWithCollection(payloadElement, payloadElement.Value.IsNull, payloadElement.Value.FullTypeName))
{
// if the value is an empty string
var stringValue = payloadElement.Value.ClrValue as string;
if (stringValue != null && stringValue.Length == 0)
{
// get the element data type. Note that this must succeed based on the checks performed earlier
var dataType = ((CollectionDataType)payloadElement.Annotations.OfType<DataTypeAnnotation>().Single().DataType).ElementDataType;
// determine whether to return a complex or primitive collection based on the data type
ODataPayloadElementCollection collection;
if (dataType is PrimitiveDataType)
{
collection = new PrimitiveCollection();
}
else
{
ExceptionUtilities.Assert(dataType is ComplexDataType, "Data type was neither primitive nor complex");
collection = new ComplexInstanceCollection();
}
// return the replacement
return payloadElement
.ReplaceWith(collection)
.WithAnnotations(new CollectionNameAnnotation() { Name = payloadElement.Name });
}
}
}
return replaced;
}