CollectionState IDataServiceCollection.SaveState(
DataServiceContext context, Dictionary <EntityDescriptor, Guid> entityDescriptorToId)
{
if (this.observer == null)
{
throw new InvalidOperationException(Strings.DataServiceCollection_OperationForTrackedOnly);
}
if (this.observer.Context != context)
{
throw new InvalidOperationException(Strings.DataServiceState_CollectionNotInContext);
}
var state = new CollectionState();
state.EntitySetName = this.entitySetName;
state.EntityTypeName = typeof(T).AssemblyQualifiedName;
state.RootCollection = this.rootCollection;
state.DescriptorIds = new List <Guid>(this.Count);
foreach (object entity in this)
{
EntityDescriptor entityDescriptor = context.GetEntityDescriptor(entity);
Guid id = entityDescriptorToId[entityDescriptor];
state.DescriptorIds.Add(id);
}
return(state);
}
/// <summary>
/// Creates the ResponseInfo object.
/// </summary>
/// <returns>ResponseInfo object.</returns>
protected override ResponseInfo CreateResponseInfo()
{
DataServiceContext context = (DataServiceContext)this.Source;
ClientEdmModel model = context.Model;
ClientTypeAnnotation type = model.GetClientTypeAnnotation(model.GetOrCreateEdmType(this.entity.GetType()));
Debug.Assert(type.IsEntityType, "Must be entity type to be contained.");
return(this.RequestInfo.GetDeserializationInfoForLoadProperty(
null,
context.GetEntityDescriptor(this.entity),
type.GetProperty(this.propertyName, false)));
}
/// <summary>
/// loading a property from a response
/// </summary>
/// <returns>QueryOperationResponse instance containing information about the response.</returns>
internal QueryOperationResponse LoadProperty()
{
MaterializeAtom results = null;
DataServiceContext context = (DataServiceContext)this.Source;
ClientEdmModel model = context.Model;
ClientTypeAnnotation type = model.GetClientTypeAnnotation(model.GetOrCreateEdmType(this.entity.GetType()));
Debug.Assert(type.IsEntityType, "must be entity type to be contained");
EntityDescriptor box = context.GetEntityDescriptor(this.entity);
if (EntityStates.Added == box.State)
{
throw Error.InvalidOperation(Strings.Context_NoLoadWithInsertEnd);
}
ClientPropertyAnnotation property = type.GetProperty(this.propertyName, false);
Type elementType = property.EntityCollectionItemType ?? property.NullablePropertyType;
try
{
if (type.MediaDataMember == property)
{
results = this.ReadPropertyFromRawData(property);
}
else
{
results = this.ReadPropertyFromAtom(property);
}
return(this.GetResponseWithType(results, elementType));
}
catch (InvalidOperationException ex)
{
QueryOperationResponse response = this.GetResponseWithType(results, elementType);
if (response != null)
{
response.Error = ex;
throw new DataServiceQueryException(Strings.DataServiceException_GeneralError, ex, response);
}
throw;
}
}
internal QueryOperationResponse LoadProperty()
{
MaterializeAtom results = null;
QueryOperationResponse responseWithType;
DataServiceContext source = (DataServiceContext)base.Source;
ClientEdmModel model = ClientEdmModel.GetModel(source.MaxProtocolVersion);
ClientTypeAnnotation clientTypeAnnotation = model.GetClientTypeAnnotation(model.GetOrCreateEdmType(this.entity.GetType()));
EntityDescriptor entityDescriptor = source.GetEntityDescriptor(this.entity);
if (EntityStates.Added == entityDescriptor.State)
{
throw System.Data.Services.Client.Error.InvalidOperation(System.Data.Services.Client.Strings.Context_NoLoadWithInsertEnd);
}
ClientPropertyAnnotation property = clientTypeAnnotation.GetProperty(this.propertyName, false);
Type elementType = property.EntityCollectionItemType ?? property.NullablePropertyType;
try
{
if (clientTypeAnnotation.MediaDataMember == property)
{
results = this.ReadPropertyFromRawData(property);
}
else
{
results = this.ReadPropertyFromAtom(entityDescriptor, property);
}
responseWithType = base.GetResponseWithType(results, elementType);
}
catch (InvalidOperationException exception)
{
QueryOperationResponse response = base.GetResponseWithType(results, elementType);
if (response != null)
{
response.Error = exception;
throw new DataServiceQueryException(System.Data.Services.Client.Strings.DataServiceException_GeneralError, exception, response);
}
throw;
}
return(responseWithType);
}
