/// <summary>
/// Create ODataRequestMessage for the given entity.
/// </summary>
/// <param name="entityDescriptor">resource</param>
/// <returns>An instance of ODataRequestMessage for the given entity.</returns>
protected ODataRequestMessageWrapper CreateRequest(EntityDescriptor entityDescriptor)
{
Debug.Assert(null != entityDescriptor, "null entityDescriptor");
Debug.Assert(entityDescriptor.State == EntityStates.Added || entityDescriptor.State == EntityStates.Deleted || entityDescriptor.State == EntityStates.Modified, "the entity must be in one of the 3 possible states");
EntityStates state = entityDescriptor.State;
Uri requestUri = entityDescriptor.GetResourceUri(this.RequestInfo.BaseUriResolver, false /*queryLink*/);
Debug.Assert(null != requestUri, "request uri is null");
Debug.Assert(requestUri.IsAbsoluteUri, "request uri is not absolute uri");
ClientEdmModel model = this.RequestInfo.Model;
ClientTypeAnnotation clientType = model.GetClientTypeAnnotation(model.GetOrCreateEdmType(entityDescriptor.Entity.GetType()));
Version requestVersion = DetermineRequestVersion(clientType);
string httpMethod = this.GetHttpMethod(state, ref requestVersion);
HeaderCollection headers = new HeaderCollection();
// Set the content type
if (EntityStates.Deleted != entityDescriptor.State)
{
this.RequestInfo.Context.Format.SetRequestContentTypeForEntry(headers);
}
// Set IfMatch (etag) header for update and delete requests
if ((EntityStates.Deleted == state) || (EntityStates.Modified == state))
{
string etag = entityDescriptor.GetLatestETag();
if (etag != null)
{
headers.SetHeader(XmlConstants.HttpRequestIfMatch, etag);
}
}
// Set the prefer header if required
ApplyPreferences(headers, httpMethod, this.RequestInfo.AddAndUpdateResponsePreference, ref requestVersion);
// Set the request DSV and request MDSV headers
headers.SetRequestVersion(requestVersion, this.RequestInfo.MaxProtocolVersionAsVersion);
this.RequestInfo.Format.SetRequestAcceptHeader(headers);
return this.CreateRequestMessage(httpMethod, requestUri, headers, this.RequestInfo.HttpStack, entityDescriptor, this.IsBatchRequest ? entityDescriptor.ChangeOrder.ToString(CultureInfo.InvariantCulture) : null);
}
/// <summary>
/// Materialize the response payload.
/// </summary>
/// <param name="entityDescriptor">entity descriptor whose response is getting materialized.</param>
/// <param name="responseInfo">information about the response to be materialized.</param>
/// <param name="etag">etag value, if specified in the response header.</param>
private void MaterializeResponse(EntityDescriptor entityDescriptor, ResponseInfo responseInfo, string etag)
{
using (MaterializeAtom materializer = this.GetMaterializer(entityDescriptor, responseInfo))
{
materializer.SetInsertingObject(entityDescriptor.Entity);
object materializedEntity = null;
foreach (object x in materializer)
{
Debug.Assert(materializedEntity == null, "entity == null");
if (materializedEntity != null)
{
Error.ThrowInternalError(InternalError.MaterializerReturningMoreThanOneEntity);
}
materializedEntity = x;
}
Debug.Assert(null != entityDescriptor.GetLatestIdentity(), "updated inserted should always gain an identity");
Debug.Assert(materializedEntity == entityDescriptor.Entity, "x == entityDescriptor.Entity, should have same object generated by response");
Debug.Assert(EntityStates.Unchanged == entityDescriptor.State, "should have moved out of insert");
Debug.Assert(this.RequestInfo.EntityTracker.TryGetEntityDescriptor(entityDescriptor.GetLatestIdentity()) != null, "should have identity tracked");
// If there was no etag specified in the payload, then we need to set the etag from the header
if (entityDescriptor.GetLatestETag() == null)
{
entityDescriptor.ETag = etag;
}
}
}