/// <summary>
/// Applies the values of a nested <paramref name="feed"/> to the collection
/// <paramref name="property"/> of the specified <paramref name="entry"/>.
/// </summary>
/// <param name="entry">Entry with collection to be modified.</param>
/// <param name="property">Collection property on the entry.</param>
/// <param name="feed">Values to apply onto the collection.</param>
/// <param name="includeLinks">Whether links that are expanded should be materialized.</param>
private void ApplyFeedToCollection(
MaterializerEntry entry,
ClientPropertyAnnotation property,
ODataFeed feed,
bool includeLinks)
{
Debug.Assert(entry.Entry != null, "entry != null");
Debug.Assert(property != null, "property != null");
Debug.Assert(feed != null, "feed != null");
ClientEdmModel edmModel = this.MaterializerContext.Model;
ClientTypeAnnotation collectionType = edmModel.GetClientTypeAnnotation(edmModel.GetOrCreateEdmType(property.EntityCollectionItemType));
IEnumerable <ODataEntry> entries = MaterializerFeed.GetFeed(feed).Entries;
foreach (ODataEntry feedEntry in entries)
{
this.Materialize(MaterializerEntry.GetEntry(feedEntry), collectionType.ElementType, includeLinks);
}
ProjectionPlan continuationPlan = includeLinks ?
ODataEntityMaterializer.CreatePlanForDirectMaterialization(property.EntityCollectionItemType) :
ODataEntityMaterializer.CreatePlanForShallowMaterialization(property.EntityCollectionItemType);
this.ApplyItemsToCollection(
entry,
property,
entries.Select(e => MaterializerEntry.GetEntry(e).ResolvedObject),
feed.NextPageLink,
continuationPlan,
false);
}
private MaterializerEntry ReadEntryCore()
{
MaterializerEntry entry2;
this.ExpectState(ODataReaderState.EntryStart);
ODataEntry item = (ODataEntry)this.reader.Item;
if (item == null)
{
entry2 = MaterializerEntry.CreateEmpty();
this.ReadAndExpectState(ODataReaderState.EntryEnd);
return(entry2);
}
entry2 = MaterializerEntry.CreateEntry(item, this.responseInfo.MaxProtocolVersion);
do
{
this.AssertRead();
switch (this.reader.State)
{
case ODataReaderState.EntryEnd:
break;
case ODataReaderState.NavigationLinkStart:
entry2.AddNavigationLink(this.ReadNavigationLink());
break;
default:
throw System.Data.Services.Client.Error.InternalError(InternalError.UnexpectedReadState);
}
}while (this.reader.State != ODataReaderState.EntryEnd);
entry2.UpdateEntityDescriptor();
return(entry2);
}
internal static MaterializerEntry ParseSingleEntityPayload(IODataResponseMessage message, ResponseInfo responseInfo, Type expectedType)
{
ODataPayloadKind payloadKind = ODataPayloadKind.Entry;
using (ODataMessageReader reader = ODataMaterializer.CreateODataMessageReader(message, responseInfo, false, ref payloadKind))
{
IEdmType orCreateEdmType = ClientEdmModel.GetModel(responseInfo.MaxProtocolVersion).GetOrCreateEdmType(expectedType);
ODataReader reader2 = ODataMaterializer.CreateODataReader(reader, payloadKind, orCreateEdmType, responseInfo.MaxProtocolVersion);
ODataFeedOrEntryReader reader3 = new ODataFeedOrEntryReader(reader2, responseInfo);
ODataEntry currentEntry = null;
bool flag = false;
while (reader3.Read())
{
flag |= reader3.CurrentFeed != null;
if (reader3.CurrentEntry != null)
{
if (currentEntry != null)
{
throw new InvalidOperationException(System.Data.Services.Client.Strings.AtomParser_SingleEntry_MultipleFound);
}
currentEntry = reader3.CurrentEntry;
}
}
if (currentEntry == null)
{
if (flag)
{
throw new InvalidOperationException(System.Data.Services.Client.Strings.AtomParser_SingleEntry_NoneFound);
}
throw new InvalidOperationException(System.Data.Services.Client.Strings.AtomParser_SingleEntry_ExpectedFeedOrEntry);
}
return(MaterializerEntry.GetEntry(currentEntry));
}
}
/// <summary>Projects a simple value from the specified <paramref name="path"/>.</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="path">Path to pull value for.</param>
/// <returns>The value for the specified <paramref name="path"/>.</returns>
/// <remarks>
/// This method will not instantiate entity types, except to satisfy requests
/// for payload-driven feeds or leaf entities.
/// </remarks>
internal static object ProjectionValueForPath(object materializer, object entry, Type expectedType, object path)
{
Debug.Assert(typeof(ODataEntityMaterializer).IsAssignableFrom(materializer.GetType()), "typeof(ODataEntityMaterializer).IsAssignableFrom(materializer.GetType())");
Debug.Assert(entry.GetType() == typeof(ODataEntry), "entry.GetType() == typeof(ODataEntry)");
Debug.Assert(path.GetType() == typeof(ProjectionPath), "path.GetType() == typeof(ProjectionPath)");
return(((ODataEntityMaterializer)materializer).ProjectionValueForPath(MaterializerEntry.GetEntry((ODataEntry)entry), expectedType, (ProjectionPath)path));
}
private bool TryReadFeedOrEntry(bool lazy, out ODataFeed feed, out MaterializerEntry entry)
{
if (this.TryStartReadFeedOrEntry())
{
if (this.reader.State == ODataReaderState.EntryStart)
{
entry = this.ReadEntryCore();
feed = null;
}
else
{
entry = null;
feed = this.ReadFeedCore(lazy);
}
}
else
{
feed = null;
entry = null;
}
if (feed == null)
{
return(entry != null);
}
return(true);
}
/// <summary>Tries to resolve the object as one from the context (only if tracking is enabled).</summary>
/// <param name="entry">Entry to resolve.</param>
/// <param name="expectedEntryType">Expected entry type for the specified <paramref name="entry"/>.</param>
/// <returns>true if the entity was resolved; false otherwise.</returns>
private bool TryResolveFromContext(MaterializerEntry entry, Type expectedEntryType)
{
Debug.Assert(entry.IsAtomOrTracking, "Should not be trying to resolve the entry from the context if entry.IsAtomOrTracking is false.");
// We should either create a new instance or grab one from the context.
if (this.MergeOption != MergeOption.NoTracking)
{
EntityStates state;
entry.ResolvedObject = this.EntityTracker.TryGetEntity(entry.Id, out state);
if (entry.ResolvedObject != null)
{
if (!expectedEntryType.IsInstanceOfType(entry.ResolvedObject))
{
throw DSClient.Error.InvalidOperation(DSClient.Strings.Deserialize_Current(expectedEntryType, entry.ResolvedObject.GetType()));
}
ClientEdmModel edmModel = this.Model;
entry.ActualType = edmModel.GetClientTypeAnnotation(edmModel.GetOrCreateEdmType(entry.ResolvedObject.GetType()));
entry.EntityHasBeenResolved = true;
// Note that deleted items will have their properties overwritten even
// if PreserveChanges is used as a merge option.
entry.ShouldUpdateFromPayload =
this.MergeOption == MergeOption.OverwriteChanges ||
(this.MergeOption == MergeOption.PreserveChanges && state == EntityStates.Unchanged) ||
(this.MergeOption == MergeOption.PreserveChanges && state == EntityStates.Deleted);
this.MaterializationLog.FoundExistingInstance(entry);
return(true);
}
}
return(false);
}
private static void CheckEntryToAccessNotNull(MaterializerEntry entry, string name)
{
if (entry.Entry == null)
{
throw new NullReferenceException(System.Data.Services.Client.Strings.AtomMaterializer_EntryToAccessIsNull(name));
}
}
internal void AddedLink(MaterializerEntry source, string propertyName, object target)
{
if (this.Tracking && (ShouldTrackWithContext(source) && ShouldTrackWithContext(target, this.responseInfo.MaxProtocolVersion)))
{
LinkDescriptor item = new LinkDescriptor(source.ResolvedObject, propertyName, target, EntityStates.Added);
this.links.Add(item);
}
}
/// <summary>Checks whether the entity on the specified <paramref name="path"/> is null.</summary>
/// <param name="entry">Root entry for paths.</param>
/// <param name="expectedType">Expected type for <paramref name="entry"/>.</param>
/// <param name="path">Path to pull value for.</param>
/// <returns>Whether the specified <paramref name="path"/> is null.</returns>
/// <remarks>
/// This method will not instantiate entity types on the path.
/// </remarks>
internal static bool ProjectionCheckValueForPathIsNull(
object entry,
Type expectedType,
object path)
{
Debug.Assert(entry.GetType() == typeof(ODataEntry), "entry.GetType() == typeof(ODataEntry)");
Debug.Assert(path.GetType() == typeof(ProjectionPath), "path.GetType() == typeof(ProjectionPath)");
return(ODataEntityMaterializer.ProjectionCheckValueForPathIsNull(MaterializerEntry.GetEntry((ODataEntry)entry), expectedType, (ProjectionPath)path));
}
/// <summary>
/// Creates the materializer entry.
/// </summary>
/// <param name="entry">The entry.</param>
/// <param name="format">The format the entry was read in.</param>
/// <param name="isTracking">True if the contents of the entry will be tracked in the context, otherwise False.</param>
/// <param name="model">The client model.</param>
/// <returns>A new materializer entry.</returns>
public static MaterializerEntry CreateEntry(ODataEntry entry, ODataFormat format, bool isTracking, ClientEdmModel model)
{
Debug.Assert(entry.GetAnnotation <MaterializerEntry>() == null, "MaterializerEntry has already been created.");
MaterializerEntry materializerEntry = new MaterializerEntry(entry, format, isTracking, model);
entry.SetAnnotation <MaterializerEntry>(materializerEntry);
return(materializerEntry);
}
internal static ODataEntry ProjectionGetEntry(MaterializerEntry entry, string name)
{
MaterializerEntry entry2 = GetPropertyOrThrow(entry.NavigationLinks, name, entry.Id).Entry;
if (entry2 == null)
{
throw new InvalidOperationException(System.Data.Services.Client.Strings.AtomMaterializer_PropertyNotExpectedEntry(name, entry.Id));
}
CheckEntryToAccessNotNull(entry2, name);
return(entry2.Entry);
}
private void ResolveByCreatingWithType(MaterializerEntry entry, Type type)
{
ClientEdmModel model = ClientEdmModel.GetModel(base.ResponseInfo.MaxProtocolVersion);
entry.ActualType = model.GetClientTypeAnnotation(model.GetOrCreateEdmType(type));
entry.ResolvedObject = Activator.CreateInstance(type);
entry.CreatedByMaterializer = true;
entry.ShouldUpdateFromPayload = true;
entry.EntityHasBeenResolved = true;
this.log.CreatedInstance(entry);
}
private bool TryReadEntry(out MaterializerEntry entry)
{
if (this.TryStartReadFeedOrEntry())
{
this.ExpectState(ODataReaderState.EntryStart);
entry = this.ReadEntryCore();
return(true);
}
entry = null;
return(false);
}
/// <summary>
/// Reads the remainder of an entry.
/// </summary>
/// <returns>An entry.</returns>
private MaterializerEntry ReadEntryCore()
{
this.ExpectState(ODataReaderState.EntryStart);
ODataEntry result = (ODataEntry)this.reader.Item;
MaterializerEntry entry;
List <ODataNavigationLink> navigationLinks = new List <ODataNavigationLink>();
if (result != null)
{
entry = MaterializerEntry.CreateEntry(
result,
this.readODataFormat,
this.mergeOption != MergeOption.NoTracking,
this.clientEdmModel);
do
{
this.AssertRead();
switch (this.reader.State)
{
case ODataReaderState.NavigationLinkStart:
// Cache the list of navigation links here but don't add them to the entry because all of the key properties may not be available yet.
navigationLinks.Add(this.ReadNavigationLink());
break;
case ODataReaderState.EntryEnd:
break;
default:
throw DSClient.Error.InternalError(InternalError.UnexpectedReadState);
}
}while (this.reader.State != ODataReaderState.EntryEnd);
entry.UpdateEntityDescriptor();
}
else
{
entry = MaterializerEntry.CreateEmpty();
this.ReadAndExpectState(ODataReaderState.EntryEnd);
}
// Add the navigation links here now that all of the property values have been read and are available to build the links.
foreach (ODataNavigationLink navigationLink in navigationLinks)
{
entry.AddNavigationLink(navigationLink);
}
return(entry);
}
private void ApplyFeedToCollection(MaterializerEntry entry, ClientPropertyAnnotation property, ODataFeed feed, bool includeLinks)
{
ClientEdmModel model = ClientEdmModel.GetModel(base.ResponseInfo.MaxProtocolVersion);
ClientTypeAnnotation clientTypeAnnotation = model.GetClientTypeAnnotation(model.GetOrCreateEdmType(property.EntityCollectionItemType));
IEnumerable <ODataEntry> entries = MaterializerFeed.GetFeed(feed).Entries;
foreach (ODataEntry entry2 in entries)
{
this.Materialize(MaterializerEntry.GetEntry(entry2), clientTypeAnnotation.ElementType, includeLinks);
}
ProjectionPlan continuationPlan = includeLinks ? CreatePlanForDirectMaterialization(property.EntityCollectionItemType) : CreatePlanForShallowMaterialization(property.EntityCollectionItemType);
this.ApplyItemsToCollection(entry, property, from e in entries select MaterializerEntry.GetEntry(e).ResolvedObject, feed.NextPageLink, continuationPlan);
}
private void ResolveOrCreateInstance(MaterializerEntry entry, Type expectedEntryType)
{
if (!this.TryResolveAsTarget(entry))
{
if (entry.Id == null)
{
throw System.Data.Services.Client.Error.InvalidOperation(System.Data.Services.Client.Strings.Deserialize_MissingIdElement);
}
if (!this.TryResolveAsCreated(entry) && !this.TryResolveFromContext(entry, expectedEntryType))
{
this.ResolveByCreating(entry, expectedEntryType);
}
}
}
private bool TryResolveAsTarget(MaterializerEntry entry)
{
if (entry.ResolvedObject == null)
{
return(false);
}
ClientEdmModel model = ClientEdmModel.GetModel(base.ResponseInfo.MaxProtocolVersion);
entry.ActualType = model.GetClientTypeAnnotation(model.GetOrCreateEdmType(entry.ResolvedObject.GetType()));
this.log.FoundTargetInstance(entry);
entry.ShouldUpdateFromPayload = this.mergeOption != MergeOption.PreserveChanges;
entry.EntityHasBeenResolved = true;
return(true);
}
public static MaterializerEntry CreateEntry(ODataEntry entry, DataServiceProtocolVersion maxProtocolVersion)
{
MaterializerEntry annotation = new MaterializerEntry(entry, maxProtocolVersion);
entry.SetAnnotation<MaterializerEntry>(annotation);
if (entry.Id == null)
{
throw System.Data.Services.Client.Error.InvalidOperation(System.Data.Services.Client.Strings.Deserialize_MissingIdElement);
}
annotation.EntityDescriptor.Identity = entry.Id;
annotation.EntityDescriptor.EditLink = entry.EditLink;
annotation.EntityDescriptor.SelfLink = entry.ReadLink;
annotation.EntityDescriptor.ETag = entry.ETag;
return annotation;
}
private static void MaterializeToList(ODataEntityMaterializer materializer, IEnumerable list, Type nestedExpectedType, IEnumerable <ODataEntry> entries)
{
Action <object, object> addToCollectionDelegate = ODataMaterializer.GetAddToCollectionDelegate(list.GetType());
foreach (ODataEntry entry in entries)
{
MaterializerEntry entry2 = MaterializerEntry.GetEntry(entry);
if (!entry2.EntityHasBeenResolved)
{
materializer.Materialize(entry2, nestedExpectedType, false);
}
addToCollectionDelegate(list, entry2.ResolvedObject);
}
}
private void ApplyItemsToCollection(MaterializerEntry entry, ClientPropertyAnnotation property, IEnumerable items, Uri nextLink, ProjectionPlan continuationPlan)
{
Func <LinkDescriptor, bool> predicate = null;
object instance = entry.ShouldUpdateFromPayload ? GetOrCreateCollectionProperty(entry.ResolvedObject, property, null) : null;
ClientEdmModel model = ClientEdmModel.GetModel(base.ResponseInfo.MaxProtocolVersion);
ClientTypeAnnotation clientTypeAnnotation = model.GetClientTypeAnnotation(model.GetOrCreateEdmType(property.EntityCollectionItemType));
foreach (object obj3 in items)
{
if (!clientTypeAnnotation.ElementType.IsAssignableFrom(obj3.GetType()))
{
throw new InvalidOperationException(System.Data.Services.Client.Strings.AtomMaterializer_EntryIntoCollectionMismatch(obj3.GetType().FullName, clientTypeAnnotation.ElementType.FullName));
}
if (entry.ShouldUpdateFromPayload)
{
property.SetValue(instance, obj3, property.PropertyName, true);
this.log.AddedLink(entry, property.PropertyName, obj3);
}
}
if (entry.ShouldUpdateFromPayload)
{
this.FoundNextLinkForCollection(instance as IEnumerable, nextLink, continuationPlan);
}
else
{
this.FoundNextLinkForUnmodifiedCollection(property.GetValue(entry.ResolvedObject) as IEnumerable);
}
if ((this.mergeOption == MergeOption.OverwriteChanges) || (this.mergeOption == MergeOption.PreserveChanges))
{
if (predicate == null)
{
predicate = delegate(LinkDescriptor x) {
if (MergeOption.OverwriteChanges != this.mergeOption)
{
return(EntityStates.Added != x.State);
}
return(true);
};
}
foreach (object obj4 in (from x in base.ResponseInfo.EntityTracker.GetLinks(entry.ResolvedObject, property.PropertyName).Where <LinkDescriptor>(predicate) select x.Target).Except <object>(EnumerateAsElementType <object>(items)))
{
if (instance != null)
{
property.RemoveValue(instance, obj4);
}
this.log.RemovedLink(entry, property.PropertyName, obj4);
}
}
}
public static MaterializerEntry CreateEntry(ODataEntry entry, DataServiceProtocolVersion maxProtocolVersion)
{
MaterializerEntry annotation = new MaterializerEntry(entry, maxProtocolVersion);
entry.SetAnnotation <MaterializerEntry>(annotation);
if (entry.Id == null)
{
throw System.Data.Services.Client.Error.InvalidOperation(System.Data.Services.Client.Strings.Deserialize_MissingIdElement);
}
annotation.EntityDescriptor.Identity = entry.Id;
annotation.EntityDescriptor.EditLink = entry.EditLink;
annotation.EntityDescriptor.SelfLink = entry.ReadLink;
annotation.EntityDescriptor.ETag = entry.ETag;
return(annotation);
}
private bool TryResolveAsCreated(MaterializerEntry entry)
{
MaterializerEntry entry2;
if (!this.log.TryResolve(entry, out entry2))
{
return(false);
}
entry.ActualType = entry2.ActualType;
entry.ResolvedObject = entry2.ResolvedObject;
entry.CreatedByMaterializer = entry2.CreatedByMaterializer;
entry.ShouldUpdateFromPayload = entry2.ShouldUpdateFromPayload;
entry.EntityHasBeenResolved = true;
return(true);
}
protected sealed override bool ReadImplementation()
{
base.nextLinkTable.Clear();
if (!this.ReadNextFeedOrEntry())
{
return(false);
}
if (((this.CurrentEntry == null) && (this.CurrentFeed != null)) && !this.ReadNextFeedOrEntry())
{
return(false);
}
MaterializerEntry.GetEntry(this.CurrentEntry).ResolvedObject = this.TargetInstance;
this.currentValue = this.materializeEntryPlan.Run(this, this.CurrentEntry, base.ExpectedType);
return(true);
}
private void MergeLists(MaterializerEntry entry, ClientPropertyAnnotation property, IEnumerable list, Uri nextLink, ProjectionPlan plan)
{
if ((entry.ShouldUpdateFromPayload && (property.NullablePropertyType == list.GetType())) && (property.GetValue(entry.ResolvedObject) == null))
{
property.SetValue(entry.ResolvedObject, list, property.PropertyName, false);
this.FoundNextLinkForCollection(list, nextLink, plan);
foreach (object obj2 in list)
{
this.log.AddedLink(entry, property.PropertyName, obj2);
}
}
else
{
this.ApplyItemsToCollection(entry, property, list, nextLink, plan);
}
}
/// <summary>
/// Tries to resolve the specified entry as an entry that has already been created in this materialization session or is already in the context.
/// </summary>
/// <param name="entry">Entry to resolve.</param>
/// <param name="expectedEntryType">Expected type of the entry.</param>
/// <returns>True if the entry was resolved, otherwise False.</returns>
internal bool TryResolveAsExistingEntry(MaterializerEntry entry, Type expectedEntryType)
{
// Resolution is based on the entry Id, so if we can't use that property, we don't even need to try to resolve it.
if (entry.IsAtomOrTracking)
{
// The resolver methods below will both need access to Id, so first ensure it's not null
if (entry.Id == null)
{
throw DSClient.Error.InvalidOperation(DSClient.Strings.Deserialize_MissingIdElement);
}
return(this.TryResolveAsCreated(entry) || this.TryResolveFromContext(entry, expectedEntryType));
}
return(false);
}
/// <summary>
/// Populates the collection property on the entry's resolved object with the given items enumerator.
/// </summary>
/// <param name="entry">Entry with collection to be modified.</param>
/// <param name="property">Collection property on the entry.</param>
/// <param name="items">Values to apply onto the collection.</param>
/// <param name="nextLink">Next link for collection continuation.</param>
/// <param name="continuationPlan">Projection plan for collection continuation.</param>
/// <returns>Collection instance that was populated.</returns>
private object PopulateCollectionProperty(
MaterializerEntry entry,
ClientPropertyAnnotation property,
IEnumerable <object> items,
Uri nextLink,
ProjectionPlan continuationPlan)
{
Debug.Assert(entry.Entry != null || entry.ForLoadProperty, "ODataEntry should be non-null except for LoadProperty");
Debug.Assert(property != null, "property != null");
Debug.Assert(items != null, "items != null");
object collection = null;
ClientEdmModel edmModel = this.MaterializerContext.Model;
ClientTypeAnnotation collectionType = edmModel.GetClientTypeAnnotation(edmModel.GetOrCreateEdmType(property.EntityCollectionItemType));
if (entry.ShouldUpdateFromPayload)
{
collection = this.GetOrCreateCollectionProperty(entry.ResolvedObject, property, entry.ForLoadProperty);
foreach (object item in items)
{
// Validate that item can be inserted into collection.
ValidateCollectionElementTypeIsItemType(item.GetType(), collectionType.ElementType);
property.SetValue(collection, item, property.PropertyName, true /* allowAdd? */);
this.EntityTrackingAdapter.MaterializationLog.AddedLink(entry, property.PropertyName, item);
}
this.FoundNextLinkForCollection(collection as IEnumerable, nextLink, continuationPlan);
}
else
{
Debug.Assert(!entry.ForLoadProperty, "LoadProperty should always have ShouldUpateForPayload set to true.");
foreach (object item in items)
{
// Validate that item can be inserted into collection.
ValidateCollectionElementTypeIsItemType(item.GetType(), collectionType.ElementType);
}
this.FoundNextLinkForUnmodifiedCollection(property.GetValue(entry.ResolvedObject) as IEnumerable);
}
return(collection);
}
/// <summary>"Resolved" the entity in the <paramref name="entry"/> by instantiating it.</summary>
/// <param name="entry">Entry to resolve.</param>
/// <param name="type">Type to create.</param>
/// <remarks>
/// After invocation, entry.ResolvedObject is exactly of type <paramref name="type"/>.
/// </remarks>
internal void ResolveByCreatingWithType(MaterializerEntry entry, Type type)
{
// TODO: CreateNewInstance needs to do all of these operations otherwise an inadvertent call to CreateNewInstance
// will create a new entity instance that is not tracked in the context or materialization log. Will need to change this
// prior to shipping if public
Debug.Assert(
entry.ResolvedObject == null,
"entry.ResolvedObject == null -- otherwise we're about to overwrite - should never be called");
ClientEdmModel edmModel = this.MaterializerContext.Model;
entry.ActualType = edmModel.GetClientTypeAnnotation(edmModel.GetOrCreateEdmType(type));
entry.ResolvedObject = this.CreateNewInstance(entry.ActualType.EdmTypeReference, type);
entry.CreatedByMaterializer = true;
entry.ShouldUpdateFromPayload = true;
entry.EntityHasBeenResolved = true;
this.EntityTrackingAdapter.MaterializationLog.CreatedInstance(entry);
}
private static void ApplyLinkProperties(ClientTypeAnnotation actualType, MaterializerEntry entry)
{
if (entry.ShouldUpdateFromPayload)
{
foreach (ClientPropertyAnnotation annotation in from p in actualType.Properties()
where p.PropertyType == typeof(DataServiceStreamLink)
select p)
{
StreamDescriptor descriptor;
string propertyName = annotation.PropertyName;
if (entry.EntityDescriptor.TryGetNamedStreamInfo(propertyName, out descriptor))
{
annotation.SetValue(entry.ResolvedObject, descriptor.StreamLink, propertyName, true);
}
}
}
}
/// <summary>Resolved or creates an instance on the specified <paramref name="entry"/>.</summary>
/// <param name="entry">Entry on which to resolve or create an instance.</param>
/// <param name="expectedEntryType">Expected type for the <paramref name="entry"/>.</param>
/// <remarks>
/// After invocation, the ResolvedObject value of the <paramref name="entry"/>
/// will be assigned, along with the ActualType value.
/// </remarks>
/// <returns>True if an existing entity is found.</returns>
internal virtual bool TryResolveExistingEntity(MaterializerEntry entry, Type expectedEntryType)
{
Debug.Assert(entry.Entry != null, "entry != null");
Debug.Assert(expectedEntryType != null, "expectedEntryType != null");
Debug.Assert(entry.EntityHasBeenResolved == false, "entry.EntityHasBeenResolved == false");
// This will be the case when TargetInstance has been set.
if (this.TryResolveAsTarget(entry))
{
return(true);
}
if (this.TryResolveAsExistingEntry(entry, expectedEntryType))
{
return(true);
}
return(false);
}
/// <summary>
/// This method is for parsing CUD operation payloads which should contain
/// 1 a single entry
/// 2 An Error
/// </summary>
/// <param name="message">the message for the payload</param>
/// <param name="responseInfo">The current ResponseInfo object</param>
/// <param name="expectedType">The expected type</param>
/// <returns>the MaterializerEntry that was read</returns>
internal static MaterializerEntry ParseSingleEntityPayload(IODataResponseMessage message, ResponseInfo responseInfo, Type expectedType)
{
ODataPayloadKind messageType = ODataPayloadKind.Entry;
using (ODataMessageReader messageReader = CreateODataMessageReader(message, responseInfo, ref messageType))
{
IEdmType edmType = responseInfo.TypeResolver.ResolveExpectedTypeForReading(expectedType);
ODataReaderWrapper reader = ODataReaderWrapper.Create(messageReader, messageType, edmType, responseInfo.ResponsePipeline);
FeedAndEntryMaterializerAdapter parser = new FeedAndEntryMaterializerAdapter(messageReader, reader, responseInfo.Model, responseInfo.MergeOption);
ODataEntry entry = null;
bool readFeed = false;
while (parser.Read())
{
readFeed |= parser.CurrentFeed != null;
if (parser.CurrentEntry != null)
{
if (entry != null)
{
throw new InvalidOperationException(DSClient.Strings.AtomParser_SingleEntry_MultipleFound);
}
entry = parser.CurrentEntry;
}
}
if (entry == null)
{
if (readFeed)
{
throw new InvalidOperationException(DSClient.Strings.AtomParser_SingleEntry_NoneFound);
}
else
{
throw new InvalidOperationException(DSClient.Strings.AtomParser_SingleEntry_ExpectedFeedOrEntry);
}
}
return(MaterializerEntry.GetEntry(entry));
}
}
/// <summary>Tries to resolve the object from those created in this materialization session.</summary>
/// <param name="entry">Entry to resolve.</param>
/// <returns>true if the entity was resolved; false otherwise.</returns>
private bool TryResolveAsCreated(MaterializerEntry entry)
{
Debug.Assert(entry.IsAtomOrTracking, "Should not be trying to resolve the entry from the current materialization session if entry.IsAtomOrTracking is false.");
MaterializerEntry existingEntry;
if (!this.MaterializationLog.TryResolve(entry, out existingEntry))
{
return(false);
}
Debug.Assert(
existingEntry.ResolvedObject != null,
"existingEntry.ResolvedObject != null -- how did it get there otherwise?");
entry.ActualType = existingEntry.ActualType;
entry.ResolvedObject = existingEntry.ResolvedObject;
entry.CreatedByMaterializer = existingEntry.CreatedByMaterializer;
entry.ShouldUpdateFromPayload = existingEntry.ShouldUpdateFromPayload;
entry.EntityHasBeenResolved = true;
return(true);
}
private bool TryResolveFromContext(MaterializerEntry entry, Type expectedEntryType)
{
if (this.mergeOption != MergeOption.NoTracking)
{
EntityStates states;
entry.ResolvedObject = base.ResponseInfo.EntityTracker.TryGetEntity(entry.Id, out states);
if (entry.ResolvedObject != null)
{
if (!expectedEntryType.IsInstanceOfType(entry.ResolvedObject))
{
throw System.Data.Services.Client.Error.InvalidOperation(System.Data.Services.Client.Strings.Deserialize_Current(expectedEntryType, entry.ResolvedObject.GetType()));
}
ClientEdmModel model = ClientEdmModel.GetModel(base.ResponseInfo.MaxProtocolVersion);
entry.ActualType = model.GetClientTypeAnnotation(model.GetOrCreateEdmType(entry.ResolvedObject.GetType()));
entry.EntityHasBeenResolved = true;
entry.ShouldUpdateFromPayload = ((this.mergeOption == MergeOption.OverwriteChanges) || ((this.mergeOption == MergeOption.PreserveChanges) && (states == EntityStates.Unchanged))) || ((this.mergeOption == MergeOption.PreserveChanges) && (states == EntityStates.Deleted));
this.log.FoundExistingInstance(entry);
return(true);
}
}
return(false);
}
public static MaterializerNavigationLink CreateLink(ODataNavigationLink link, MaterializerEntry entry)
{
MaterializerNavigationLink annotation = new MaterializerNavigationLink(link, entry);
link.SetAnnotation<MaterializerNavigationLink>(annotation);
return annotation;
}
private static bool ShouldTrackWithContext(MaterializerEntry entry)
{
return entry.ActualType.IsEntityType;
}
internal bool TryResolve(MaterializerEntry entry, out MaterializerEntry existingEntry)
{
ODataEntry entry2;
if (this.identityStack.TryGetValue(entry.Id, out entry2))
{
existingEntry = MaterializerEntry.GetEntry(entry2);
return true;
}
if (this.appendOnlyEntries.TryGetValue(entry.Id, out entry2))
{
EntityStates states;
this.responseInfo.EntityTracker.TryGetEntity(entry.Id, out states);
if (states == EntityStates.Unchanged)
{
existingEntry = MaterializerEntry.GetEntry(entry2);
return true;
}
this.appendOnlyEntries.Remove(entry.Id);
}
existingEntry = null;
return false;
}
internal void FoundTargetInstance(MaterializerEntry entry)
{
if (ShouldTrackWithContext(entry))
{
this.responseInfo.EntityTracker.AttachIdentity(entry.EntityDescriptor, this.mergeOption);
this.identityStack.Add(entry.Id, entry.Entry);
this.insertRefreshObject = entry.ResolvedObject;
}
}
internal void FoundExistingInstance(MaterializerEntry entry)
{
this.identityStack[entry.Id] = entry.Entry;
}
internal void CreatedInstance(MaterializerEntry entry)
{
if (ShouldTrackWithContext(entry))
{
this.identityStack.Add(entry.Id, entry.Entry);
if (this.mergeOption == MergeOption.AppendOnly)
{
this.appendOnlyEntries.Add(entry.Id, entry.Entry);
}
}
}
private bool TryReadFeedOrEntry(bool lazy, out ODataFeed feed, out MaterializerEntry entry)
{
if (this.TryStartReadFeedOrEntry())
{
if (this.reader.State == ODataReaderState.EntryStart)
{
entry = this.ReadEntryCore();
feed = null;
}
else
{
entry = null;
feed = this.ReadFeedCore(lazy);
}
}
else
{
feed = null;
entry = null;
}
if (feed == null)
{
return (entry != null);
}
return true;
}
private bool TryReadEntry(out MaterializerEntry entry)
{
if (this.TryStartReadFeedOrEntry())
{
this.ExpectState(ODataReaderState.EntryStart);
entry = this.ReadEntryCore();
return true;
}
entry = null;
return false;
}
