/// <summary>
/// Merge the discriminatorMap info we just found with what we've already found.
/// In practice, if either the current or the new map is from an OfTypeOnly view, we
/// have to avoid the optimizations.
/// If we have a new map that is a superset of the current map, then we can just swap
/// the new map for the current one.
/// If the current map is tha super set of the new one ther's nothing to do.
/// (Of course, if neither has changed, then we really don't need to look)
/// </summary>
internal void Merge(EntityTypeBase neededRootEntityType, bool includesSubtypes, ExplicitDiscriminatorMap discriminatorMap)
{
// If what we've found doesn't exactly match what we are looking for we have more work to do
if (RootEntityType != neededRootEntityType
|| IncludesSubTypes != includesSubtypes)
{
if (!IncludesSubTypes
|| !includesSubtypes)
{
// If either the original or the new map is from an of-type-only view we can't
// merge, we just have to not optimize this case.
DiscriminatorMap = null;
}
if (TypeSemantics.IsSubTypeOf(RootEntityType, neededRootEntityType))
{
// we're asking for a super type of existing type, and what we had is a proper
// subset of it -we can replace the existing item.
RootEntityType = neededRootEntityType;
DiscriminatorMap = discriminatorMap;
}
if (!TypeSemantics.IsSubTypeOf(neededRootEntityType, RootEntityType))
{
// If either the original or the new map is from an of-type-only view we can't
// merge, we just have to not optimize this case.
DiscriminatorMap = null;
}
}
}
internal DiscriminatedNewEntityOp(
TypeUsage type, ExplicitDiscriminatorMap discriminatorMap,
EntitySet entitySet, List <RelProperty> relProperties)
: base(OpType.DiscriminatedNewEntity, type, true, entitySet, relProperties)
{
DebugCheck.NotNull(discriminatorMap);
m_discriminatorMap = discriminatorMap;
}
internal virtual DiscriminatedNewEntityOp CreateDiscriminatedNewEntityOp(
TypeUsage type,
ExplicitDiscriminatorMap discriminatorMap,
EntitySet entitySet,
List <RelProperty> relProperties)
{
return(new DiscriminatedNewEntityOp(type, discriminatorMap, entitySet, relProperties));
}
internal RootTypeInfo(TypeUsage type, ExplicitDiscriminatorMap discriminatorMap)
: base(type, null)
{
PlanCompiler.Assert(type.EdmType.BaseType == null, "only root types allowed here");
m_propertyMap = new Dictionary<PropertyRef, EdmProperty>();
m_propertyRefList = new List<PropertyRef>();
m_discriminatorMap = discriminatorMap;
TypeIdKind = TypeIdKind.Generated;
}
private readonly RootTypeInfo m_rootType; // the top-most type in this types type hierarchy
#endregion
#region Constructors and factory methods
/// <summary>
/// Creates type information for a type
/// </summary>
/// <param name="type"> </param>
/// <param name="superTypeInfo"> </param>
/// <returns> </returns>
internal static TypeInfo Create(md.TypeUsage type, TypeInfo superTypeInfo, ExplicitDiscriminatorMap discriminatorMap)
{
TypeInfo result;
if (superTypeInfo == null)
{
result = new RootTypeInfo(type, discriminatorMap);
}
else
{
result = new TypeInfo(type, superTypeInfo);
}
return result;
}
internal DiscriminatorMapInfo(EntityTypeBase rootEntityType, bool includesSubTypes, ExplicitDiscriminatorMap discriminatorMap)
{
RootEntityType = rootEntityType;
IncludesSubTypes = includesSubTypes;
DiscriminatorMap = discriminatorMap;
}
private TypeInfo CreateTypeInfoForStructuredType(md.TypeUsage type, ExplicitDiscriminatorMap discriminatorMap)
{
TypeInfo typeInfo;
PlanCompiler.Assert(TypeUtils.IsStructuredType(type), "expected structured type. Found " + type);
// Return existing entry, if one is available
typeInfo = GetTypeInfo(type);
if (typeInfo != null)
{
return typeInfo;
}
// Ensure that my supertype has been added to the map.
TypeInfo superTypeInfo = null;
md.RefType refType;
if (type.EdmType.BaseType != null)
{
superTypeInfo = CreateTypeInfoForStructuredType(md.TypeUsage.Create(type.EdmType.BaseType), discriminatorMap);
}
//
// Handle Ref types also in a similar fashion
//
else if (TypeHelpers.TryGetEdmType(type, out refType))
{
var entityType = refType.ElementType as md.EntityType;
if (entityType != null
&& entityType.BaseType != null)
{
var baseRefType = TypeHelpers.CreateReferenceTypeUsage(entityType.BaseType as md.EntityType);
superTypeInfo = CreateTypeInfoForStructuredType(baseRefType, discriminatorMap);
}
}
//
// Add the types of my properties to the TypeInfo map
//
foreach (md.EdmMember m in TypeHelpers.GetDeclaredStructuralMembers(type))
{
CreateTypeInfoForType(m.TypeUsage);
}
//
// Get the types of the rel properties also
//
{
md.EntityTypeBase entityType;
if (TypeHelpers.TryGetEdmType(type, out entityType))
{
foreach (var p in m_relPropertyHelper.GetDeclaredOnlyRelProperties(entityType))
{
CreateTypeInfoForType(p.ToEnd.TypeUsage);
}
}
}
// Now add myself to the map
typeInfo = TypeInfo.Create(type, superTypeInfo, discriminatorMap);
m_typeInfoMap.Add(type, typeInfo);
return typeInfo;
}
// <summary>
// Tries to lookup custom discriminator map for the given type (applies to EntitySets with
// TPH discrimination pattern)
// </summary>
private bool TryGetDiscriminatorMap(md.EdmType type, out ExplicitDiscriminatorMap discriminatorMap)
{
discriminatorMap = null;
// check that there are actually discriminator maps available
if (null == m_discriminatorMaps)
{
return false;
}
// must be an entity type...
if (type.BuiltInTypeKind
!= md.BuiltInTypeKind.EntityType)
{
return false;
}
// get root entity type (discriminator maps are mapped from the root)
var rootEntityType = GetRootType((md.EntityType)type);
// find entity set
md.EntitySet entitySet;
if (!m_entityTypeToEntitySetMap.TryGetValue(rootEntityType, out entitySet))
{
return false;
}
// free floating entity constructors are stored with a null EntitySet
if (entitySet == null)
{
return false;
}
// look for discriminator map
return m_discriminatorMaps.TryGetValue(entitySet, out discriminatorMap);
}
// <summary>
// Create a discriminated named type constructor
// </summary>
// <param name="type"> Type metadata that specifies the type of the instance to construct </param>
// <param name="discriminatorMap"> Mapping information including discriminator values </param>
// <param name="entitySet"> the entityset that this instance belongs to </param>
// <param name="relProperties"> list of rel properties that have corresponding values </param>
// <returns> A new DiscriminatedNewInstanceOp with the specified result type and discrimination behavior </returns>
internal virtual DiscriminatedNewEntityOp CreateDiscriminatedNewEntityOp(
TypeUsage type, ExplicitDiscriminatorMap discriminatorMap,
EntitySet entitySet, List<RelProperty> relProperties)
{
return new DiscriminatedNewEntityOp(type, discriminatorMap, entitySet, relProperties);
}
