/// <summary>
/// Helper method for visiting null or empty properties
/// </summary>
/// <param name="payloadElement">The property to visit</param>
protected override void VisitEmptyOrNullProperty(PropertyInstance payloadElement)
{
base.VisitEmptyOrNullProperty(payloadElement);
var property = this.MetadataStack.Peek() as MemberProperty;
var navigation = this.MetadataStack.Peek() as NavigationProperty;
if (property != null)
{
ExceptionUtilities.Assert(payloadElement.Name == property.Name, "Property name mismatch");
payloadElement.AddAnnotationIfNotExist(new MemberPropertyAnnotation() { Property = property });
}
else
{
ExceptionUtilities.CheckObjectNotNull(navigation, "Expected property or navigation, got '{0}'", this.MetadataStack.Peek());
ExceptionUtilities.Assert(payloadElement.Name == navigation.Name, "Property name mismatch");
payloadElement.AddAnnotationIfNotExist(new NavigationPropertyAnnotation() { Property = navigation });
var emptyCollection = payloadElement as EmptyCollectionProperty;
if (emptyCollection != null && emptyCollection.Value != null)
{
emptyCollection.Value.AddAnnotationIfNotExist(new EntitySetAnnotation() { EntitySet = this.CurrentEntitySet.GetRelatedEntitySet(navigation) });
}
}
}
/// <summary>
/// Helper method for visiting properties
/// </summary>
/// <param name="payloadElement">The property to visit</param>
/// <param name="value">The value of the property</param>
protected override void VisitProperty(PropertyInstance payloadElement, ODataPayloadElement value)
{
ExceptionUtilities.CheckArgumentNotNull(payloadElement, "payloadElement");
var property = this.MetadataStack.Peek() as MemberProperty;
if (property != null)
{
ExceptionUtilities.Assert(payloadElement.Name == property.Name, "Property name mismatch");
payloadElement.AddAnnotationIfNotExist(new MemberPropertyAnnotation() { Property = property });
try
{
this.MetadataStack.Push(property.PropertyType);
base.VisitProperty(payloadElement, value);
}
finally
{
this.MetadataStack.Pop();
}
}
else
{
var navprop = this.MetadataStack.Peek() as NavigationProperty;
if (navprop != null)
{
ExceptionUtilities.Assert(payloadElement.Name == navprop.Name, "Property name mismatch");
try
{
this.MetadataStack.Push(this.CurrentEntitySet.GetRelatedEntitySet(navprop));
base.VisitProperty(payloadElement, value);
}
finally
{
this.MetadataStack.Pop();
}
}
else
{
var serviceOperation = this.MetadataStack.OfType<Function>().SingleOrDefault(f => f.Name.Equals(payloadElement.Name, StringComparison.Ordinal));
if (payloadElement.Name.Contains('.'))
{
// if the action has a name collision with a property in the entity, it will have the <container name>.<action name> in the payload
// split the payloadElement.Name and get the last token which will match the function name
string lastToken = payloadElement.Name.Split('.').Last();
serviceOperation = this.MetadataStack.OfType<Function>().SingleOrDefault(f => f.Name.Equals(lastToken, StringComparison.Ordinal));
}
ExceptionUtilities.CheckObjectNotNull(serviceOperation, "Expected property, got " + this.MetadataStack.Peek().ToString());
// Non-entity values returned from a service operation call appear identical to member properties,
// with the operation name as the property name
base.VisitProperty(payloadElement, value);
}
}
}
