/// <summary>
/// Gets the URI for requery.
/// </summary>
/// <returns>Uri for requery.</returns>
public override Uri GetUriForRequery()
{
LinkDescriptorData linkData = this.DescriptorData;
Uri uri = null;
var linkInfo = linkData.SourceDescriptor.LinkInfos.SingleOrDefault(l => l.Name == linkData.SourcePropertyName);
if (linkInfo != null)
{
uri = linkInfo.NavigationLink;
}
if (uri == null)
{
uri = new Uri(linkData.SourceDescriptor.EditLink + "/" + linkData.SourcePropertyName);
}
if (!this.IsReference)
{
ExceptionUtilities.Assert(linkData.TargetDescriptor != null, "TargetDescriptor can not be null for the link descriptor representing collection.");
ExceptionUtilities.CheckObjectNotNull(linkData.TargetDescriptor.EditLink, "Target edit-link can not be null for the link descriptor representing collection.");
Regex keyRegex = new Regex(@".+(?<key>\(.+\))");
Match match = keyRegex.Match(linkData.TargetDescriptor.EditLink.OriginalString);
ExceptionUtilities.Assert(match.Success, "Unhandled entity edit-link format. Edit link: " + linkData.TargetDescriptor.EditLink);
string targetKey = match.Groups["key"].Value;
uri = new Uri(uri + targetKey);
}
return(uri);
}
private HttpRequestData CreateAddLinkRequest(LinkDescriptorData linkDescriptorData, LinkInfoData info)
{
return(new HttpRequestData()
{
Uri = this.GetLinkUri(linkDescriptorData, info), Verb = HttpVerb.Post
});
}
private HttpRequestData CreateDeleteLinkRequest(LinkDescriptorData linkDescriptorData, LinkInfoData info)
{
string keyString = this.EntityDescriptorValueCalculator.CalculateEntityKey(linkDescriptorData.TargetDescriptor.Entity);
return(new HttpRequestData()
{
Uri = new Uri(this.GetLinkUri(linkDescriptorData, info).OriginalString + keyString), Verb = HttpVerb.Delete
});
}
private void VerifyDescriptor(DescriptorData expected, Descriptor actual, int responseOrder)
{
EntityDescriptorData entityDescriptorData = expected as EntityDescriptorData;
LinkDescriptorData linkDescriptorData = expected as LinkDescriptorData;
StreamDescriptorData streamDescriptorData = expected as StreamDescriptorData;
if (entityDescriptorData != null)
{
EntityDescriptor entityDescriptor = actual as EntityDescriptor;
this.Assert.IsNotNull(entityDescriptor, GetVerificationFailureMessage(responseOrder, "Unexpected descriptor type:\r\nExpected: {0}\r\nActual: {1}\r\nExpected descriptor data: {2}.", typeof(EntityDescriptor).Name, actual.GetType().Name, entityDescriptorData));
this.Assert.AreSame(
entityDescriptorData.Entity,
entityDescriptor.Entity,
GetVerificationFailureMessage(responseOrder, "Entity verification failed for the entity descriptor data: {0}.", expected));
}
else if (linkDescriptorData != null)
{
LinkDescriptor linkDescriptor = actual as LinkDescriptor;
this.Assert.IsNotNull(linkDescriptor, GetVerificationFailureMessage(responseOrder, "Unexpected descriptor type:\r\nExpected: {0}\r\nActual: {1}\r\nExpected descriptor data: {2}.", typeof(LinkDescriptor).Name, actual.GetType().Name, linkDescriptorData));
bool notMatch = linkDescriptorData.SourceDescriptor.Entity != linkDescriptor.Source ||
(linkDescriptorData.TargetDescriptor == null && linkDescriptor.Target != null) ||
(linkDescriptorData.TargetDescriptor != null && linkDescriptorData.TargetDescriptor.Entity != linkDescriptor.Target) ||
linkDescriptorData.SourcePropertyName != linkDescriptor.SourceProperty;
this.Assert.IsFalse(notMatch, GetVerificationFailureMessage(responseOrder, "Link verification failed.\r\nExpected: {0}\r\nActual: {1}", linkDescriptorData, linkDescriptor.ToTraceString()));
}
else
{
#if WINDOWS_PHONE
throw new TaupoNotSupportedException("StreamDescriptors are not supported on Windows Phone");
#else
ExceptionUtilities.CheckObjectNotNull(streamDescriptorData, "Expected was not an entity, link, or stream descriptor: {0}", expected);
StreamDescriptor streamDescriptor = actual as StreamDescriptor;
this.Assert.IsNotNull(streamDescriptor, GetVerificationFailureMessage(responseOrder, "Unexpected descriptor type:\r\nExpected: {0}\r\nActual: {1}\r\nExpected descriptor data: {2}.", typeof(StreamDescriptor).Name, actual.GetType().Name, streamDescriptorData));
this.Assert.AreEqual(streamDescriptorData.State.ToProductEnum(), streamDescriptor.State, GetVerificationFailureMessage(responseOrder, "Stream descriptor state verification failed."));
this.Assert.AreEqual(streamDescriptorData.Name, streamDescriptor.StreamLink.Name, GetVerificationFailureMessage(responseOrder, "Stream descriptor name verification failed."));
this.Assert.AreEqual(streamDescriptorData.ETag, streamDescriptor.StreamLink.ETag, GetVerificationFailureMessage(responseOrder, "Stream descriptor etag verification failed."));
this.Assert.AreEqual(streamDescriptorData.ContentType, streamDescriptor.StreamLink.ContentType, GetVerificationFailureMessage(responseOrder, "Stream descriptor content type verification failed."));
this.Assert.AreEqual(streamDescriptorData.EditLink, streamDescriptor.StreamLink.EditLink, GetVerificationFailureMessage(responseOrder, "Stream descriptor edit link verification failed."));
this.Assert.AreEqual(streamDescriptorData.SelfLink, streamDescriptor.StreamLink.SelfLink, GetVerificationFailureMessage(responseOrder, "Stream descriptor self link verification failed."));
#endif
}
}
internal static Uri BuildLinkUri(LinkDescriptorData linkDescriptorData, LinkInfoData info)
{
Uri linkUri;
if (info != null && info.RelationshipLink != null)
{
linkUri = info.RelationshipLink;
}
else
{
ExceptionUtilities.CheckObjectNotNull(linkDescriptorData.SourceDescriptor.EditLink, "Edit link of source descriptor cannot be null");
linkUri = new Uri(UriHelpers.ConcatenateUriSegments(linkDescriptorData.SourceDescriptor.EditLink.OriginalString, Endpoints.Ref, linkDescriptorData.SourcePropertyName), UriKind.RelativeOrAbsolute);
}
return(linkUri);
}
private HttpRequestData CreateSetLinkRequest(LinkDescriptorData linkDescriptorData, LinkInfoData info)
{
HttpVerb verb;
if (linkDescriptorData.TargetDescriptor == null)
{
verb = HttpVerb.Delete;
}
else
{
verb = HttpVerb.Put;
}
return(new HttpRequestData()
{
Uri = this.GetLinkUri(linkDescriptorData, info), Verb = verb
});
}
private LinkDescriptor GetLinkDescriptor(LinkDescriptorData linkDescriptorData)
{
object sourceEntity = this.GetEntityDescriptor(linkDescriptorData.SourceDescriptor).Entity;
object targetEntity = linkDescriptorData.TargetDescriptor != null?
this.GetEntityDescriptor(linkDescriptorData.TargetDescriptor).Entity : null;
// Note: GetLinkDescriptor throws ArgumenNullException when target is null even so there is an existing link with null target.
var descriptor = targetEntity != null?
this.context.GetLinkDescriptor(sourceEntity, linkDescriptorData.SourcePropertyName, targetEntity)
: this.context.Links.Where(l => l.Source == sourceEntity && l.SourceProperty == linkDescriptorData.SourcePropertyName && l.Target == null).SingleOrDefault();
if (descriptor == null)
{
throw new AssertionFailedException(
string.Format(CultureInfo.InvariantCulture, "Link descriptor is missing from the data service context. Expected link descriptor data: {{{0}}}.", linkDescriptorData));
}
return(descriptor);
}
/// <summary>
/// Tracks the SetLink method.
/// </summary>
/// <param name="data">The data service context data on which to apply state transition.</param>
/// <param name="source">The source.</param>
/// <param name="sourcePropertyName">Name of the source property.</param>
/// <param name="target">The target.</param>
public static void TrackSetLink(this DataServiceContextData data, object source, string sourcePropertyName, object target)
{
ExceptionUtilities.CheckStringArgumentIsNotNullOrEmpty(sourcePropertyName, "sourcePropertyName");
EntityDescriptorData sourceDescriptorData = GetTrackedEntityDescriptorData(data, source, "Cannot set link:", "source");
CheckStateIsNot(EntityStates.Deleted, sourceDescriptorData, "Cannot set link:", "source");
EntityDescriptorData targetDescriptorData = null;
if (target != null)
{
targetDescriptorData = GetTrackedEntityDescriptorData(data, target, "Cannot set link:", "target");
CheckStateIsNot(EntityStates.Deleted, sourceDescriptorData, "Cannot set link:", "target");
}
var relatedToSource = data.LinkDescriptorsData.Where(e => e.SourceDescriptor.Entity == source && e.SourcePropertyName == sourcePropertyName).ToList();
if (relatedToSource.Count > 1)
{
throw new TaupoInvalidOperationException("Cannot set link: source contains multiple links for the property: " + sourcePropertyName);
}
LinkDescriptorData existingLinkDescriptorData = relatedToSource.FirstOrDefault();
if (existingLinkDescriptorData == null)
{
data.CreateLinkDescriptorData(EntityStates.Modified, data.GetNextChangeOrder(), sourceDescriptorData, sourcePropertyName, targetDescriptorData);
}
else
{
if (existingLinkDescriptorData.State != EntityStates.Modified || existingLinkDescriptorData.TargetDescriptor != targetDescriptorData)
{
data.ChangeStateAndChangeOrder(existingLinkDescriptorData, EntityStates.Modified, data.GetNextChangeOrder());
}
existingLinkDescriptorData.TargetDescriptor = targetDescriptorData;
}
}
/// <summary>
/// Creates LinkChangeData which captures the state of the specified link descriptor data.
/// </summary>
/// <param name="linkData">The link descriptor data.</param>
/// <returns>Link change data.</returns>
public static LinkChangeData Create(LinkDescriptorData linkData)
{
ExceptionUtilities.CheckArgumentNotNull(linkData, "linkData");
LinkChangeData changeData = new LinkChangeData(linkData);
var isEnumerable = linkData.SourceDescriptor.EntityClrType.GetProperty(linkData.SourcePropertyName).PropertyType.GetInterfaces().Any(t => t.Name == "IEnumerable");
changeData.IsReference = !isEnumerable;
if (linkData.TargetDescriptor != null)
{
changeData.ClrTypeForRequery = linkData.TargetDescriptor.EntityClrType;
}
else
{
ExceptionUtilities.Assert(changeData.IsReference, "TargetDescriptor can not be null for the link descriptor representing collection.");
changeData.ClrTypeForRequery = linkData.SourceDescriptor.EntityClrType.GetProperty(linkData.SourcePropertyName).PropertyType;
}
return(changeData);
}
private ExpectedClientRequest CreateLinkRequest(LinkDescriptorData linkDescriptorData, SaveChangesOptions options)
{
var info = linkDescriptorData.SourceDescriptor.LinkInfos.SingleOrDefault(l => l.Name == linkDescriptorData.SourcePropertyName);
ExpectedClientRequest request = new ExpectedClientRequest()
{
Uri = BuildLinkUri(linkDescriptorData, info)
};
if (linkDescriptorData.State == EntityStates.Added)
{
request.Verb = HttpVerb.Post;
// note: the edit-link is used rather than identity because the server needs to be able to query for the target entity
// and the identity may not be an actual uri
request.Body = new DeferredLink()
{
UriString = linkDescriptorData.TargetDescriptor.EditLink.OriginalString
};
}
else if (linkDescriptorData.State == EntityStates.Modified)
{
if (linkDescriptorData.TargetDescriptor == null)
{
request.Verb = HttpVerb.Delete;
}
else
{
request.Verb = HttpVerb.Put;
// note: the edit-link is used rather than identity because the server needs to be able to query for the target entity
// and the identity may not be an actual uri
request.Body = new DeferredLink()
{
UriString = linkDescriptorData.TargetDescriptor.EditLink.OriginalString
};
}
}
else
{
ExceptionUtilities.Assert(linkDescriptorData.State == EntityStates.Deleted, "Link descriptor was in unexpected state '{0}'", linkDescriptorData.State);
string keyString = this.EntityDescriptorValueCalculator.CalculateEntityKey(linkDescriptorData.TargetDescriptor.Entity);
request.Uri = new Uri(request.Uri.OriginalString + keyString);
request.Verb = HttpVerb.Delete;
}
request.Headers[HttpHeaders.IfMatch] = null;
request.Headers[HttpHeaders.Prefer] = null;
request.Headers[HttpHeaders.DataServiceVersion] = ToClientHeaderFormat(DataServiceProtocolVersion.V4);
this.SetDefaultAcceptHeader(request, options);
if (request.Verb != HttpVerb.Delete)
{
request.Headers[HttpHeaders.ContentType] = string.IsNullOrWhiteSpace(this.ClientRequestAcceptHeader) ? MimeTypes.ApplicationXml : this.ClientRequestAcceptHeader;
}
else
{
request.Headers[HttpHeaders.ContentType] = null;
}
string hintString = @"Link\r\n{{\r\n Descriptor = {0}\r\n Options = {1}\r\n}}";
request.DebugHintString = string.Format(CultureInfo.InvariantCulture, hintString, linkDescriptorData, options);
return(request);
}
/// <summary>
/// Tracks the SaveChanges method.
/// </summary>
/// <param name="data">The data service context data on which to apply state transition.</param>
/// <param name="options">The options.</param>
/// <param name="response">The response.</param>
/// <param name="cachedOperationsFromResponse">The individual operation respones, pre-enumerated and cached.</param>
/// <param name="tracker">The entity data change tracker to use</param>
public static void TrackSaveChanges(this DataServiceContextData data, SaveChangesOptions options, DSClient.DataServiceResponse response, IEnumerable <DSClient.OperationResponse> cachedOperationsFromResponse, IEntityDescriptorDataChangeTracker tracker)
{
ExceptionUtilities.CheckArgumentNotNull(data, "data");
ExceptionUtilities.CheckArgumentNotNull(response, "response");
ExceptionUtilities.CheckArgumentNotNull(cachedOperationsFromResponse, "cachedOperationsFromResponse");
ExceptionUtilities.CheckArgumentNotNull(tracker, "tracker");
// Check options and response consistency
if ((options & SaveChangesOptions.ContinueOnError) == 0)
{
ExceptionUtilities.Assert(response.Count(r => r.Error != null) == 0, "Check save changes options and response consistency: no errors in the response when ContinueOnError is off.");
}
// because some links will not have separate requests, we need to keep track of all link changes
var allPendingLinkChanges = data.GetOrderedChanges().OfType <LinkDescriptorData>().ToList();
// go through the pending changes and update the states based on whether the request succeeded
foreach (DSClient.ChangeOperationResponse changeResponse in cachedOperationsFromResponse)
{
DescriptorData descriptorData;
LinkDescriptorData linkDescriptorData = null;
StreamDescriptorData streamDescriptorData = null;
var entityDescriptor = changeResponse.Descriptor as DSClient.EntityDescriptor;
if (entityDescriptor != null)
{
descriptorData = data.GetEntityDescriptorData(entityDescriptor.Entity);
}
else
{
var linkDescriptor = changeResponse.Descriptor as DSClient.LinkDescriptor;
if (linkDescriptor != null)
{
linkDescriptorData = data.GetLinkDescriptorData(linkDescriptor.Source, linkDescriptor.SourceProperty, linkDescriptor.Target);
descriptorData = linkDescriptorData;
allPendingLinkChanges.Remove(linkDescriptorData);
}
else
{
// for stream descriptors, we need to find the parent descriptor, then get the stream descriptor data from it
var streamDescriptor = (DSClient.StreamDescriptor)changeResponse.Descriptor;
entityDescriptor = streamDescriptor.EntityDescriptor;
streamDescriptorData = data.GetStreamDescriptorData(entityDescriptor.Entity, streamDescriptor.StreamLink.Name);
descriptorData = streamDescriptorData;
}
}
// don't update states for responses that indicate failure
if (changeResponse.Error != null)
{
continue;
}
// because the request succeeded, make the corresponding updates to the states
if (descriptorData.State == EntityStates.Deleted ||
(linkDescriptorData != null &&
linkDescriptorData.State == EntityStates.Modified &&
linkDescriptorData.SourceDescriptor.State == EntityStates.Deleted))
{
data.RemoveDescriptorData(descriptorData);
}
else
{
// for non-deleted descriptors, we need to update states based on the headers
var entityDescriptorData = descriptorData as EntityDescriptorData;
if (entityDescriptorData != null)
{
if (entityDescriptorData.IsMediaLinkEntry && entityDescriptorData.DefaultStreamState == EntityStates.Modified)
{
entityDescriptorData.DefaultStreamDescriptor.UpdateFromHeaders(changeResponse.Headers);
entityDescriptorData.DefaultStreamState = EntityStates.Unchanged;
}
else
{
if (entityDescriptorData.IsMediaLinkEntry && entityDescriptorData.DefaultStreamState == EntityStates.Added)
{
entityDescriptorData.DefaultStreamState = EntityStates.Unchanged;
}
// because there might have been a reading-entity event for this entity, we need to apply the headers through the tracker
tracker.TrackUpdateFromHeaders(entityDescriptorData, changeResponse.Headers);
// ensure that all updates are applied before moving to the next response
tracker.ApplyPendingUpdates(entityDescriptorData);
entityDescriptorData.ParentForInsert = null;
entityDescriptorData.ParentPropertyForInsert = null;
entityDescriptorData.InsertLink = null;
}
}
else if (streamDescriptorData != null)
{
streamDescriptorData.UpdateFromHeaders(changeResponse.Headers);
}
descriptorData.State = EntityStates.Unchanged;
}
}
// go through each link change that did not have an assocatiated response and update its state
foreach (var linkDescriptorData in allPendingLinkChanges.OfType <LinkDescriptorData>())
{
if (linkDescriptorData.State == EntityStates.Added || linkDescriptorData.State == EntityStates.Modified)
{
linkDescriptorData.State = EntityStates.Unchanged;
}
}
}
/// <summary>
/// Initializes a new instance of the <see cref="LinkChangeData"/> class.
/// </summary>
/// <param name="linkDescriptorData">The link descriptor data.</param>
protected LinkChangeData(LinkDescriptorData linkDescriptorData)
: base(linkDescriptorData)
{
}