/// <summary>
/// MultipleDiscriminatorPolymorphicColumnMap
/// </summary>
internal override ColumnMap Visit(MultipleDiscriminatorPolymorphicColumnMap columnMap, ColumnMapTranslatorTranslationDelegate translationDelegate)
{
// At this time, we shouldn't ever see this type here; it's for SPROCS which don't use
// the plan compiler.
System.Data.Query.PlanCompiler.PlanCompiler.Assert(false, "unexpected MultipleDiscriminatorPolymorphicColumnMap in ColumnMapTranslator");
return(null);
}
internal override void Visit(MultipleDiscriminatorPolymorphicColumnMap columnMap, int dummy)
{
// MultipleDiscriminator maps contain an opaque discriminator delegate, so recompilation
// is always required. Generate a unique key for the discriminator.
// FUTURE: consider using either a separate cache for MultipleDiscriminator OR make the delegate transparent
Append(String.Format(CultureInfo.InvariantCulture, "MD-{0}", Guid.NewGuid()));
}
internal override void Visit(MultipleDiscriminatorPolymorphicColumnMap columnMap, int dummy)
{
// MultipleDiscriminator maps contain an opaque discriminator delegate, so recompilation
// is always required. Generate a unique key for the discriminator.
//
Append(String.Format(CultureInfo.InvariantCulture, "MD-{0}", Guid.NewGuid()));
}
internal override ColumnMap Visit(
MultipleDiscriminatorPolymorphicColumnMap columnMap,
ColumnMapTranslatorTranslationDelegate translationDelegate)
{
System.Data.Entity.Core.Query.PlanCompiler.PlanCompiler.Assert(false, "unexpected MultipleDiscriminatorPolymorphicColumnMap in ColumnMapTranslator");
return((ColumnMap)null);
}
/// <summary>
/// Creates a column map for the given reader and function mapping.
/// </summary>
internal virtual CollectionColumnMap CreateFunctionImportStructuralTypeColumnMap(
DbDataReader storeDataReader, FunctionImportMappingNonComposable mapping, int resultSetIndex, EntitySet entitySet,
StructuralType baseStructuralType)
{
var resultMapping = mapping.GetResultMapping(resultSetIndex);
Debug.Assert(resultMapping != null);
if (resultMapping.NormalizedEntityTypeMappings.Count == 0) // no explicit mapping; use default non-polymorphic reader
{
// if there is no mapping, create default mapping to root entity type or complex type
Debug.Assert(!baseStructuralType.Abstract, "mapping loader must verify abstract types have explicit mapping");
return CreateColumnMapFromReaderAndType(
storeDataReader, baseStructuralType, entitySet, resultMapping.ReturnTypeColumnsRenameMapping);
}
// the section below deals with the polymorphic entity type mapping for return type
var baseEntityType = baseStructuralType as EntityType;
Debug.Assert(null != baseEntityType, "We should have entity type here");
// Generate column maps for all discriminators
var discriminatorColumns = CreateDiscriminatorColumnMaps(storeDataReader, mapping, resultSetIndex);
// Generate default maps for all mapped entity types
var mappedEntityTypes = new HashSet<EntityType>(resultMapping.MappedEntityTypes);
mappedEntityTypes.Add(baseEntityType); // make sure the base type is represented
var typeChoices = new Dictionary<EntityType, TypedColumnMap>(mappedEntityTypes.Count);
ColumnMap[] baseTypeColumnMaps = null;
foreach (var entityType in mappedEntityTypes)
{
var propertyColumnMaps = GetColumnMapsForType(storeDataReader, entityType, resultMapping.ReturnTypeColumnsRenameMapping);
var entityColumnMap = CreateEntityTypeElementColumnMap(
storeDataReader, entityType, entitySet, propertyColumnMaps, resultMapping.ReturnTypeColumnsRenameMapping);
if (!entityType.Abstract)
{
typeChoices.Add(entityType, entityColumnMap);
}
if (entityType == baseStructuralType)
{
baseTypeColumnMaps = propertyColumnMaps;
}
}
// NOTE: We don't have a null sentinel here, because the stored proc won't
// return one anyway; we'll just presume the data's always there.
var polymorphicMap = new MultipleDiscriminatorPolymorphicColumnMap(
TypeUsage.Create(baseStructuralType), baseStructuralType.Name, baseTypeColumnMaps, discriminatorColumns, typeChoices,
(object[] discriminatorValues) => mapping.Discriminate(discriminatorValues, resultSetIndex));
CollectionColumnMap collection = new SimpleCollectionColumnMap(
baseStructuralType.GetCollectionType().TypeUsage, baseStructuralType.Name, polymorphicMap, null, null);
return collection;
}
internal virtual void Visit(MultipleDiscriminatorPolymorphicColumnMap columnMap, TArgType arg)
{
foreach (var typeDiscriminator in columnMap.TypeDiscriminators)
{
typeDiscriminator.Accept(this, arg);
}
foreach (var typeColumnMap in columnMap.TypeChoices.Values)
{
typeColumnMap.Accept(this, arg);
}
foreach (var property in columnMap.Properties)
{
property.Accept(this, arg);
}
}
public void TranslateColumnMap_with_MultipleDiscriminatorPolymorphicColumnMap_returns_a_ShaperFactory()
{
var polymorphicMap = new MultipleDiscriminatorPolymorphicColumnMap(
new Mock<TypeUsage>().Object, "MockType", new ColumnMap[0], new SimpleColumnMap[0],
new Dictionary<EntityType, TypedColumnMap>(),
discriminatorValues => new EntityType("E", "N", DataSpace.CSpace));
CollectionColumnMap collection = new SimpleCollectionColumnMap(
new Mock<TypeUsage>().Object, "MockCollectionType", polymorphicMap, null, null);
var metadataWorkspaceMock = new Mock<MetadataWorkspace>();
metadataWorkspaceMock.Setup(m => m.GetQueryCacheManager()).Returns(QueryCacheManager.Create());
Assert.NotNull(
new Translator().TranslateColumnMap<object>(
collection, metadataWorkspaceMock.Object, new SpanIndex(), MergeOption.NoTracking, streaming: true, valueLayer: false));
}
public void TranslateColumnMap_with_MultipleDiscriminatorPolymorphicColumnMap_returns_a_ShaperFactory()
{
var polymorphicMap = new MultipleDiscriminatorPolymorphicColumnMap(
new Mock <TypeUsage>().Object, "MockType", new ColumnMap[0], new SimpleColumnMap[0],
new Dictionary <EntityType, TypedColumnMap>(),
discriminatorValues => new EntityType("E", "N", DataSpace.CSpace));
CollectionColumnMap collection = new SimpleCollectionColumnMap(
new Mock <TypeUsage>().Object, "MockCollectionType", polymorphicMap, null, null);
var metadataWorkspaceMock = new Mock <MetadataWorkspace>();
metadataWorkspaceMock.Setup(m => m.GetQueryCacheManager()).Returns(QueryCacheManager.Create());
Assert.NotNull(
new Translator().TranslateColumnMap <object>(
collection, metadataWorkspaceMock.Object, new SpanIndex(), MergeOption.NoTracking, streaming: true, valueLayer: false));
}
internal abstract TResultType Visit(
MultipleDiscriminatorPolymorphicColumnMap columnMap,
TArgType arg);
internal override void Visit(
MultipleDiscriminatorPolymorphicColumnMap columnMap,
int dummy)
{
this.Append(string.Format((IFormatProvider)CultureInfo.InvariantCulture, "MD-{0}", (object)Guid.NewGuid()));
}
