/// <summary>Initializes a projection-driven entry (with a specific type and specific properties).</summary>
/// <param name="materializer">Materializer under which projection is taking place.</param>
/// <param name="entry">Root entry for paths.</param>
/// <param name="expectedType">Expected type for <paramref name="entry"/>.</param>
/// <param name="resultType">Expected result type.</param>
/// <param name="properties">Properties to materialize.</param>
/// <param name="propertyValues">Functions to get values for functions.</param>
/// <returns>The initialized entry.</returns>
internal static object ProjectionInitializeEntity(
object materializer,
object entry,
Type expectedType,
Type resultType,
string[] properties,
Func <object, object, Type, object>[] propertyValues)
{
Debug.Assert(typeof(ODataEntityMaterializer).IsAssignableFrom(materializer.GetType()), "typeof(ODataEntityMaterializer).IsAssignableFrom(materializer.GetType())");
Debug.Assert(entry.GetType() == typeof(ODataResource), "entry.GetType() == typeof(ODataResource)");
return(ODataEntityMaterializer.ProjectionInitializeEntity((ODataEntityMaterializer)materializer, MaterializerEntry.GetEntry((ODataResource)entry), expectedType, resultType, properties, propertyValues));
}
/// <summary>Materializes an entry without including in-lined expanded links.</summary>
/// <param name="materializer">Materializer under which materialization should take place.</param>
/// <param name="entry">Entry with object to materialize.</param>
/// <param name="expectedEntryType">Expected type for the entry.</param>
/// <returns>The materialized instance.</returns>
internal static object ShallowMaterializePlan(object materializer, object entry, Type expectedEntryType)
{
Debug.Assert(typeof(ODataEntityMaterializer).IsAssignableFrom(materializer.GetType()), "typeof(ODataEntityMaterializer).IsAssignableFrom(materializer.GetType())");
Debug.Assert(entry.GetType() == typeof(ODataResource), "entry.GetType() == typeof(ODataResource)");
return(ODataEntityMaterializer.ShallowMaterializePlan((ODataEntityMaterializer)materializer, MaterializerEntry.GetEntry((ODataResource)entry), expectedEntryType));
}
/// <summary>Applies all accumulated changes to the associated data context.</summary>
/// <remarks>The log should be cleared after this method successfully executed.</remarks>
internal void ApplyToContext()
{
if (!this.Tracking)
{
return;
}
foreach (KeyValuePair <Uri, ODataResource> entity in this.identityStack)
{
// Try to attach the entity descriptor got from materializer, if one already exists, get the existing reference instead.
MaterializerEntry entry = MaterializerEntry.GetEntry(entity.Value);
bool mergeEntityDescriptorInfo = entry.CreatedByMaterializer ||
entry.ResolvedObject == this.insertRefreshObject ||
entry.ShouldUpdateFromPayload;
// Whenever we merge the data, only at those times will be merge the links also
EntityDescriptor descriptor = this.entityTracker.InternalAttachEntityDescriptor(entry.EntityDescriptor, false /*failIfDuplicated*/);
AtomMaterializerLog.MergeEntityDescriptorInfo(descriptor, entry.EntityDescriptor, mergeEntityDescriptorInfo, this.mergeOption);
if (mergeEntityDescriptorInfo)
{
// In AtomMaterializer.TryResolveFromContext, we set AtomEntry.ShouldUpdateFromPayload to true
// when even MergeOption is PreserveChanges and entityState is Deleted. But in that case, we cannot
// set the entity state to Unchanged, hence need to workaround that one scenario
if (this.mergeOption != MergeOption.PreserveChanges || descriptor.State != EntityStates.Deleted)
{
// we should always reset descriptor's state to Unchanged (old v1 behavior)
descriptor.State = EntityStates.Unchanged;
descriptor.PropertiesToSerialize.Clear();
}
}
}
foreach (LinkDescriptor link in this.links)
{
if (EntityStates.Added == link.State)
{
// Added implies collection
this.entityTracker.AttachLink(link.Source, link.SourceProperty, link.Target, this.mergeOption);
}
else if (EntityStates.Modified == link.State)
{
// Modified implies reference
object target = link.Target;
if (MergeOption.PreserveChanges == this.mergeOption)
{
// GetLinks looks up the existing link using just the SourceProperty, the declaring server type name is not significant here.
LinkDescriptor end = this.entityTracker.GetLinks(link.Source, link.SourceProperty).SingleOrDefault();
if (end != null && end.Target == null)
{
// leave the SetLink(link.Source, link.SourceProperty, null)
continue;
}
if ((target != null) && (this.entityTracker.GetEntityDescriptor(target).State == EntityStates.Deleted) ||
(EntityStates.Deleted == this.entityTracker.GetEntityDescriptor(link.Source).State))
{
target = null;
}
}
this.entityTracker.AttachLink(link.Source, link.SourceProperty, target, this.mergeOption);
}
else
{
// detach link
Debug.Assert(EntityStates.Detached == link.State, "not detached link");
this.entityTracker.DetachExistingLink(link, false);
}
}
}