//Get base class objects corresponding to a given IncludeBinding.
private Func <TableEntityRow, object[]> Get_GetBaseObjects_Computation(MaterializationData data,
Predicate <IRelatedBinding> comparer)
{
var fieldIndexes = new List <int>();
for (int i = 0; i < data.ProjectedType.RelatedBindings.Count; i++)
{
var b = data.ProjectedType.RelatedBindings[i];
if (b is InheritanceBinding && comparer(b))
{
fieldIndexes.Add(i + 1);
}
}
return(source => fieldIndexes.Select(idx => source.Values[idx]).ToArray());
}
private Func <object, TableEntityRow, object> Get_GetOrCreateEntityOrCollection_Computation(SimpleType trackedType, MaterializationData data)
{
if (trackedType is ProjectedType)
{
return(Get_HandleProjectedType_Computation(trackedType, data));
}
else if (trackedType.Constructor != null)
{
return(Get_CreateTypeWithConstructor_Computation(trackedType, data));
}
//When EnumerableItemType is not null... eg. Collections
else if (trackedType.NonPrimitiveEnumerableItemType != null)
{
return(Get_CreateCollection_Computation(trackedType, data));
}
//Simple Entities
else if (typeof(IEntity).IsAssignableFrom(trackedType.Type))
{
return(Get_GetOrCreateSimpleEntity_Computation(trackedType, data));
}
//Primitive types.. eg. int, long, string. Leave as is.
else
{
return(Get_CreatePrimitiveType_Computation());
}
}
//Get base class objects corresponding to a given TrackedType.
private Func <TableEntityRow, object[]> Get_GetBaseObjects_Computation(SimpleType trackedType, MaterializationData data)
{
return(Get_GetBaseObjects_Computation(data, b => b.MatchesTarget(trackedType)));
}
//Get base class objects corresponding to a given IncludeBinding.
private Func <TableEntityRow, object[]> Get_GetBaseObjects_Computation(IncludeBinding binding, MaterializationData data)
{
return(Get_GetBaseObjects_Computation(data, b => b.MatchesTarget(binding)));
}
private Action <object, TableEntityRow> Get_AttachIncludes_Computation(SimpleType trackedType, MaterializationData data)
{
var includeBindings = data.ProjectedType.RelatedBindings
.Where(b => b is IncludeBinding && (b.TargetBinding is QueryBinding) &&
(b.TargetBinding as QueryBinding).Value == trackedType).Cast <IncludeBinding>().ToList();
var attachIncludes = includeBindings.Select(b => Get_AttachIncludes_Computation(trackedType.Type, b, data)).ToList();
return((entity, source) =>
{
attachIncludes.ForEach(f => f(entity, source));
});
}
private Action <object, TableEntityRow> Get_AttachIncludes_Computation(Type entityType, IncludeBinding includeBinding
, MaterializationData data)
{
var includeBindings = data.ProjectedType.RelatedBindings
.Where(b => b is IncludeBinding && b.TargetBinding == includeBinding).Cast <IncludeBinding>().ToList();
var setIncludes = includeBindings.Select(b => Get_AttachIncludes_Computation(includeBinding.Type, b, data)).ToList();
//The fieldNo is 1 more than the related-binding index; since the first field [0] is the main entity itself.
var fieldNo = data.ProjectedType.RelatedBindings.IndexOf(includeBinding) + 1;
var getOrCreateEntityOrCollection = Get_GetOrCreateEntityOrCollection_Computation(includeBinding, data);
var memberInfo = (includeBinding.IncludeDirective.GetSelector().Body as MemberExpression).Member;
//Handling Many-to-Many Map type separately
if (entityContext._InternalServices.TypeTranslationUtil.GetMapping <IMapEntityMapping>(entityType) != null)
{
return((parent, source) =>
{
//Setting the include directive in the intermediate object
(parent as IEntity)._getIntermediateEntity().IncludeDirectives.Add(includeBinding.IncludeDirective);
var valueInProjection = source.Values[fieldNo];
var memberValue = getOrCreateEntityOrCollection(valueInProjection, source);
memberInfo.SetValue(parent, memberValue);
setIncludes.ForEach(f => f(memberValue, source));
});
}
//Not a Many-to-Many Collection
else
{
var backingContainerGetter = entityContext._InternalServices.TypeTranslationUtil
.MakeBackingContainerGetter(entityType, memberInfo);
return((parent, source) =>
{
//Setting the include directive in the intermediate object
(parent as IEntity)._getIntermediateEntity().IncludeDirectives.Add(includeBinding.IncludeDirective);
var valueInProjection = source.Values[fieldNo];
var intermediateContainerOnParent = backingContainerGetter((parent as IEntity)._getIntermediateEntity());
var memberValue = getOrCreateEntityOrCollection(valueInProjection, source);
if (null == memberValue)
{
return;
}
if (memberValue is IList)
{
foreach (var entity in (memberValue as IList))
{
intermediateContainerOnParent.MaterializationAddReference((entity as IEntity)._getIntermediateEntity());
}
}
else
{
intermediateContainerOnParent.MaterializationAddReference((memberValue as IEntity)._getIntermediateEntity());
}
var member = memberInfo.GetValue(parent);
setIncludes.ForEach(f => f(member, source));
});
}
}
Get_GetMembers_Computation(Dictionary <MemberInfo, SimpleType> memberQuerableTypes, SimpleType trackedType, MaterializationData data)
{
var members = new Dictionary <MemberInfo, KeyValuePair <Func <object, object>, Func <object, TableEntityRow, object> > >();
foreach (var memberInfo in memberQuerableTypes.Keys)
{
members.Add(memberInfo, new KeyValuePair <Func <object, object>, Func <object, TableEntityRow, object> >
(trackedType.GetTranslatedMemberValue(memberInfo, entityContext._InternalServices.TypeTranslationUtil),
Get_GetOrCreateEntityOrCollection_Computation(memberQuerableTypes[memberInfo], data)));
}
return(members);
}
private Func <object, TableEntityRow, object> Get_GetOrCreateEntity_Computation(IncludeBinding includeBinding, MaterializationData data)
{
var getbaseObjects = Get_GetBaseObjects_Computation(includeBinding, data);
var entityConstructor = new EntityConstructor(entityContext, includeBinding.Type);
return((projectedEntity, source) =>
{
if (projectedEntity == null)
{
return null;
}
var tableObjects = new List <object>();
tableObjects.Add(projectedEntity);
tableObjects.AddRange(getbaseObjects(source));
return entityConstructor.GetOrCreateEntity(tableObjects.ToArray());
});
}
private Func <object, TableEntityRow, object> Get_GetOrCreateEntityOrCollection_Computation(IncludeBinding includeBinding, MaterializationData data)
{
if (entityContext._InternalServices.TypeTranslationUtil.IsEntityCollection(includeBinding.Type))
{
var unprojectedBinding = data.ProjectedType.UnprojectedBindings
.Find(ub => (ub is UnprojectedCollectionBinding || ub is UnprojectedManyToManyBinding) && ub.TargetBinding == includeBinding);
if (unprojectedBinding != null)
{
if (unprojectedBinding is UnprojectedManyToManyBinding)
{
return(Get_GetUnprojectedCollections_Computation(unprojectedBinding, data.ManyToManyMaps));
}
else
{
return(Get_GetUnprojectedCollections_Computation(unprojectedBinding, data.InheritanceChains));
}
}
else
{
var collItemType = TypesUtil.GetGenericArgumentForBaseType(includeBinding.Type, typeof(ICollection <>));
var collectionEntityConstructor = new EntityConstructor(entityContext, collItemType);
return((tableEntity, source) =>
{
var list = new List <object>();
foreach (var item in (tableEntity as IEnumerable))
{
list.Add(collectionEntityConstructor.GetOrCreateEntity(new object[] { item }));
}
return list;
});
}
}
return(Get_GetOrCreateEntity_Computation(includeBinding, data));
}
//Simple Entities
private Func <object, TableEntityRow, object> Get_GetOrCreateSimpleEntity_Computation(SimpleType trackedType, MaterializationData data)
{
var getOrCreateEntity = Get_GetOrCreateEntity_Computation(trackedType, data);
var attachIncludes = Get_AttachIncludes_Computation(trackedType, data);
return((projectedEntity, source) =>
{
var newObj = getOrCreateEntity(projectedEntity, source);
attachIncludes(newObj, source);
return newObj;
});
}
//When EnumerableItemType is not null... eg. Collections
private Func <object, TableEntityRow, object> Get_CreateCollection_Computation(SimpleType trackedType, MaterializationData data)
{
var collectionType = typeof(List <>).MakeGenericType(trackedType.NonPrimitiveEnumerableItemType.Type);
if (entityContext._InternalServices.TypeTranslationUtil.IsEntityCollection(trackedType.Type))
{
var unprojectedBinding = data.ProjectedType.UnprojectedBindings
.Find(ub => (ub is UnprojectedCollectionBinding || ub is UnprojectedManyToManyBinding) &&
ub.TargetBinding is QueryBinding && (ub.TargetBinding as QueryBinding).Value == trackedType);
if (unprojectedBinding != null)
{
var getUnprojectedCollection = Get_GetUnprojectedCollections_Computation(unprojectedBinding,
(unprojectedBinding is UnprojectedManyToManyBinding) ? data.ManyToManyMaps : data.InheritanceChains);
if (unprojectedBinding is UnprojectedManyToManyBinding)
{
var mappingMember = (trackedType.NonPrimitiveEnumerableItemType as ManyToManyMapType).Mapping.Name;
return((projectedEntity, source) =>
{
var maps = getUnprojectedCollection(projectedEntity, source);
var list = Activator.CreateInstance(collectionType) as IList;
foreach (var map in (maps as IList))
{
list.Add(map.GetType().GetProperty(mappingMember).GetValue(map));
}
return list;
});
}
else
{
return(getUnprojectedCollection);
}
}
}
var getOrCreateEntity = Get_GetOrCreateEntityOrCollection_Computation(trackedType.NonPrimitiveEnumerableItemType, data);
var attachIncludes = Get_AttachIncludes_Computation(trackedType, data);
return((projectedEntity, source) =>
{
var list = Activator.CreateInstance(collectionType) as IList;
foreach (var collItem in (projectedEntity as IEnumerable))
{
list.Add(getOrCreateEntity(collItem, source));
}
attachIncludes(list, source);
return list;
});
}
//Where the user has mentioned a specific constructor in the query.
private Func <object, TableEntityRow, object> Get_CreateTypeWithConstructor_Computation(SimpleType trackedType, MaterializationData data)
{
var fields = new Dictionary <MemberInfo, KeyValuePair <Func <object, object>, Func <object, TableEntityRow, object> > >();
var constructorArgs = new Dictionary <MemberInfo, KeyValuePair <Func <object, object>, Func <object, TableEntityRow, object> > >();
if (TypesUtil.IsCompilerGeneratedAnonymousType(trackedType.Type))
{
constructorArgs = Get_GetMembers_Computation(trackedType.GetAllMembers(), trackedType, data);
}
else
{
fields = Get_GetMembers_Computation(trackedType.Fields, trackedType, data);
}
Action <object, object, TableEntityRow> setCollectionItems = (newObj, projectedEntity, source) => { };
if (trackedType.NonPrimitiveEnumerableItemType != null)
{
var getOrCreateCollectionItem = Get_GetOrCreateEntityOrCollection_Computation(trackedType.NonPrimitiveEnumerableItemType, data);
var addMethod = trackedType.Constructor.DeclaringType.GetMethod("Add", new Type[] { trackedType.NonPrimitiveEnumerableItemType.Type });
setCollectionItems = (newObj, projectedEntity, source) =>
{
foreach (var tableCollectionItem in (projectedEntity as IEnumerable))
{
var collItem = getOrCreateCollectionItem(tableCollectionItem, source);
addMethod.Invoke(newObj, new object[] { collItem });
}
};
}
Action <object, MemberInfo, object> setMemberValue = (obj, m, val) => trackedType.Constructor.DeclaringType.GetProperty(m.Name).SetValue(obj, val);
return((projectedEntity, source) =>
{
var args = constructorArgs.Select(kvp => kvp.Value.Value(kvp.Value.Key(projectedEntity), source)).ToArray();
var newObj = trackedType.Constructor.Invoke(args);
foreach (var fld in fields)
{
setMemberValue(newObj, fld.Key, fld.Value.Value(fld.Value.Key(projectedEntity), source));
}
setCollectionItems(newObj, projectedEntity, source);
return newObj;
});
}
//If the ProjectedType appears again in the Type-Tracking Tree, handle it.
private Func <object, TableEntityRow, object> Get_HandleProjectedType_Computation(SimpleType trackedType, MaterializationData data)
{
var valueGetter = Get_FindValueInTreeMatchingTrackedType_Computation(data.ProjectedType, trackedType);
var newResults = data.ResultSet.Select(result => valueGetter(result)).ToList();
var getProjectionValue = Get_GetProjection_Computation(trackedType as ProjectedType, newResults);
return((tableEntity, source) =>
{
var newRow = new TableEntityRow(tableEntity as AnonymousType);
return getProjectionValue(newRow.Values[0], newRow);
});
}
