private void LoadRelatedPostProcess <T>(
IEnumerable <T> sourceEntities,
LoadRelatedOptions options, LoadRelatedPreProcessInfo preProcessInfo)
{
JToken[] rows = ClientAdaper.GetDocuments(preProcessInfo.EntityIdsToLoad);
EntitiesProcessResult processResult = Process(rows, new OdmViewProcessingOptions());
Dictionary <string, EntitiesProcessResult> viewsSelectResult = SelectToManyFromViews(preProcessInfo);
foreach (T sourceEntity in sourceEntities)
{
string entityId = GetEntityInstanceId(sourceEntity);
JToken document = DocumentManager.DocInfo(entityId).Document;
// ToOne
foreach (PropertyInfo toOneProp in options.ToOne)
{
string relatedEntityId = GetRelatedToOneEntityId(document, toOneProp);
object relatedToOneEntity = processResult.GetEntity(relatedEntityId);
// This line was comment out because it is possible to get null related entity
// when the property is optional. This check needs to be done only for required properties.
//if (relatedToOneEntity == null) throw new Exception("Fail to find ToOne related entity for property " + toOneProp);
toOneProp.SetValue(sourceEntity, relatedToOneEntity);
}
// ToOne already loaded
foreach (PropertyInfo toOneProp in options.ToOneExist)
{
string relatedEntityId = GetRelatedToOneEntityId(document, toOneProp);
object relatedToOneEntity = identityMap.GetEntityById(relatedEntityId);
if (relatedToOneEntity == null)
{
throw new Exception("Fail to find ToOneExist related entity for property " + toOneProp);
}
toOneProp.SetValue(sourceEntity, relatedToOneEntity);
}
// ToMany Direct
foreach (PropertyInfo toManyDirectProp in options.ToManyDirect)
{
string[] relatedEntitiesIds = GetRelatedToManyEntitiesIds(document, toManyDirectProp);
if (relatedEntitiesIds != null)
{
serializer.SetDirectAssoicationCollectionProperty(sourceEntity, toManyDirectProp, relatedEntitiesIds);
}
}
// ToMany Inverse
foreach (LoadRelatedWithViewInfo toManyViewInfo in options.ToManyView)
{
EntitiesProcessResult viewProcessResult = viewsSelectResult[toManyViewInfo.ViewName];
string[] relatedEntitiesIds = viewProcessResult.GetRelatedEntitiesIds(entityId);
AssociationAttribute associationAttr = AssociationAttribute.GetSingle(toManyViewInfo.PropertyInfo);
serializer.SetInverseAssociationCollectionInternal(
sourceEntity, toManyViewInfo.PropertyInfo, associationAttr, relatedEntitiesIds);
}
}
}
/// <summary>
/// Load specified related entities of the sourceEntities.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="sourceEntities"></param>
/// <param name="configOptions"></param>
public void LoadRelated <T>(IEnumerable <T> sourceEntities, Action <LoadRelatedOptionsBuilder <T> > configOptions)
{
var optionsBuilder = new LoadRelatedOptionsBuilder <T>();
configOptions(optionsBuilder);
LoadRelatedOptions options = optionsBuilder.Build();
// First pre-process all the source entities and find the relatd entities to load.
LoadRelatedPreProcessInfo preProcessInfo = LoadRelatedPreProcess(sourceEntities, options);
// Load the related entities and set the association properties.
LoadRelatedPostProcess(sourceEntities, options, preProcessInfo);
}
private LoadRelatedPreProcessInfo LoadRelatedPreProcess <T>(IEnumerable <T> sourceEntities, LoadRelatedOptions options)
{
var builder = new LoadRelatedPreProcessInfoBuilder();
foreach (T sourceEntity in sourceEntities)
{
string entityId = GetEntityInstanceId(sourceEntity);
JToken document = DocumentManager.DocInfo(entityId).Document;
Debug.Assert(document != null, "Fail to find the original document of the entity " + sourceEntity);
// Find all ToOne associations to load
foreach (PropertyInfo toOneProp in options.ToOne)
{
string relatedEntityId = GetRelatedToOneEntityId(document, toOneProp);
if (!string.IsNullOrEmpty(relatedEntityId))
{
builder.RelatedEntityIdsToLoad.Add(relatedEntityId);
}
}
// Find all ToMany associations to load
foreach (PropertyInfo toManyDirectProp in options.ToManyDirect)
{
string[] relatedEntitiesIds = GetRelatedToManyEntitiesIds(document, toManyDirectProp) ?? new string[0];
foreach (string relatedEntityId in relatedEntitiesIds)
{
builder.RelatedEntityIdsToLoad.Add(relatedEntityId);
}
}
// Prepare all Inverse-ToMany with views.
foreach (LoadRelatedWithViewInfo inverseToMany in options.ToManyView)
{
builder.AddViewSelection(inverseToMany.ViewName, GetEntityInstanceId(sourceEntity));
}
}
return(builder.Build());
}
