private void FixUpDeferredForeignKeyMetadata(
CustomMetadataWorkspace workspace,
IEnumerable <DeferredForeignKeyMetadata> deferredForeignKeys
)
{
foreach (DeferredForeignKeyMetadata metadata in deferredForeignKeys)
{
CustomEntityType targetEntity;
if (!workspace.TryGetEntityType(metadata.Attribute.TargetEntityType, out targetEntity))
{
ThrowUnableToFindPartOfForeignKey(
"entity type mapped to CLR object",
metadata.Attribute.TargetEntityType.Name,
metadata
);
}
var targetPrimaryKey = targetEntity.PrimaryKeyProperties
.Where(pk => pk.Name == metadata.Attribute.TargetKeyPropertyName)
.Select(pk => pk)
.SingleOrDefault();
if (null == targetPrimaryKey)
{
ThrowUnableToFindPartOfForeignKey(
"primary key",
metadata.Attribute.TargetKeyPropertyName,
metadata
);
}
metadata.Consraint.DefferedInitialization(targetEntity, targetPrimaryKey);
}
}
private CustomEntitySetType InferEntitySetFromEntityType(
CustomMetadataWorkspace metadata,
CustomEntityType entityType,
string context
)
{
var candidateEntitySets = metadata.EntitySets.Where(es => es.BaseElementType
.IsAssignableFrom(entityType))
.Select(es => es);
if (candidateEntitySets.Count() == 1)
{
return(candidateEntitySets.First());
}
throw new CustomMetadataException(String.Format(
"Cannot infer type of entity set from given entity type '{0}' " +
"in the context of '{1}' because there are either no or several " +
"entity sets with suitable base element type: [{2}]. Specify " +
"which entity set to use.",
entityType,
context,
CustomUtils.FormatCsvString(candidateEntitySets.Select(e => e.Name))
));
}
private void FixUpDeferredRelationshipMetadata(
CustomMetadataWorkspace workspace,
IEnumerable <DeferredRelationshipMetadata> deferredRelationships
)
{
foreach (DeferredRelationshipMetadata metadata in deferredRelationships)
{
CustomEntityType entityType;
if (!workspace.TryGetEntityType(metadata.ClrObjectType, out entityType))
{
ThrowUnableToFindPartOfRelationship("entity type mapped to CLR object", metadata.ClrObjectType.Name, metadata);
}
CustomEntitySetType entitySetType;
if (null == metadata.Attribute.EntitySetName)
{
entitySetType = InferEntitySetFromEntityType(workspace, entityType, metadata.ToString());
}
else
{
if (!workspace.TryGetEntitySet(metadata.Attribute.EntitySetName, out entitySetType))
{
ThrowUnableToFindPartOfRelationship("entity set", metadata.Attribute.EntitySetName, metadata);
}
Debug.Assert(entitySetType.BaseElementType.IsAssignableFrom(entityType));
}
var multiplicity = metadata.Attribute.Multiplicity;
var navProperty = metadata.NavigationProperty;
bool isPrimaryEnd = metadata.Attribute.IsPrimaryEnd;
var relatedEndMultiplicity = metadata.Attribute.RelatedEndMultiplicity;
CustomEntityType relatedEndEntityType;
if (null == metadata.Attribute.RelatedEndEntityType)
{
if (CustomMultiplicity.Many == relatedEndMultiplicity)
{
Debug.Assert(typeof(IEnumerable).IsAssignableFrom(navProperty.ClrType));
if ((typeof(ICollection <>).IsAssignableFrom(navProperty.ClrType.GetGenericTypeDefinition())))
{
relatedEndEntityType = workspace.GetEntityType(navProperty.ClrType.GetGenericArguments()[0]);
}
else
{
throw new CustomMetadataException(String.Format(
"Cannot infer type of collection returned by navigation " +
"property '{0}' because it is not generic collection. Use " +
"generic collection or specify the type of the related entity.",
navProperty
));
}
}
else
{
Debug.Assert(!typeof(IEnumerable).IsAssignableFrom(navProperty.ClrType));
relatedEndEntityType = workspace.GetEntityType(navProperty.ClrType);
}
}
else
{
if (!workspace.TryGetEntityType(metadata.Attribute.RelatedEndEntityType, out relatedEndEntityType))
{
ThrowUnableToFindPartOfRelationship("entity type mapped to CLR object",
metadata.Attribute.RelatedEndEntityType.Name, metadata);
}
}
CustomEntitySetType relatedEndEntitySetType;
if (null == metadata.Attribute.RelatedEndEntitySetName)
{
relatedEndEntitySetType = InferEntitySetFromEntityType(workspace, relatedEndEntityType, metadata.ToString());
}
else
{
if (!workspace.TryGetEntitySet(metadata.Attribute.RelatedEndEntitySetName, out relatedEndEntitySetType))
{
ThrowUnableToFindPartOfRelationship("entity set", metadata.Attribute.RelatedEndEntitySetName, metadata);
}
Debug.Assert(relatedEndEntitySetType.BaseElementType.IsAssignableFrom(relatedEndEntityType));
}
CustomNavigationPropertyType relatedEndProperty = null;
if (null != metadata.Attribute.RelatedEndPropertyName)
{
relatedEndProperty =
relatedEndEntityType.NavigationProperties
.Where(p => p.Name == metadata.Attribute.RelatedEndPropertyName)
.Select(p => p)
.SingleOrDefault();
if (null == relatedEndProperty)
{
ThrowUnableToFindPartOfRelationship("other end navigation property",
metadata.Attribute.RelatedEndPropertyName, metadata);
}
}
metadata.NavigationProperty.From.DefferedInitialization(
isPrimaryEnd,
entitySetType,
entityType,
navProperty,
multiplicity
);
metadata.NavigationProperty.To.DefferedInitialization(
!isPrimaryEnd,
relatedEndEntitySetType,
relatedEndEntityType,
relatedEndProperty,
relatedEndMultiplicity
);
if (null != metadata.NavigationProperty.To.RelatedProperty)
{
var fromMember = metadata.NavigationProperty.To;
if (fromMember.RelatedProperty.From.EntityType != null)
{
/*
* Debug.Assert(fromMember.RelatedProperty.To.RelatedProperty == metadata.NavigationProperty);
* Debug.Assert(fromMember.RelatedProperty.To.EntityType == metadata.NavigationProperty.From.EntityType);
* Debug.Assert(fromMember.RelatedProperty.To.Multiplicity == metadata.NavigationProperty.From.Multiplicity);
* Debug.Assert(fromMember.RelatedProperty.To.IsPrimaryEnd == metadata.NavigationProperty.From.IsPrimaryEnd);
*/
}
}
if (CustomMultiplicity.Many == navProperty.To.Multiplicity)
{
Debug.Assert(typeof(IEnumerable).IsAssignableFrom(navProperty.ClrType));;
}
}
}
private CustomMetadataWorkspace Build()
{
CustomMetadataWorkspace workspace = new CustomMetadataWorkspace();
ICollection <DeferredForeignKeyMetadata> deferredForeignKeys
= new List <DeferredForeignKeyMetadata>();
ICollection <DeferredRelationshipMetadata> deferredRelationships
= new List <DeferredRelationshipMetadata>();
ICollection <CustomEntitySetType> collectedEntitySets = new List <CustomEntitySetType>();
foreach (Type clrObjectType in _clrObjectTypeCollection)
{
ICollection <EntityMemberCandidate> memberCandidates = CollectFlatMemberCandidateList(clrObjectType);
ICollection <CustomPropertyType> properties = GetEntityProperties(
clrObjectType,
memberCandidates,
deferredForeignKeys
);
ICollection <CustomNavigationPropertyType> navigationProperties
= GetEntityNavigationProperties(
clrObjectType,
memberCandidates,
deferredRelationships
);
CustomEntityType entityType = new CustomEntityType(
clrObjectType,
properties,
navigationProperties
);
CollectEntitySets(clrObjectType, entityType, collectedEntitySets);
workspace.Add(entityType);
if (memberCandidates.Count > 0)
{
/*
* warn user about unmapped properties?
* Debug.Fail(String.Format(
* "Found unmapped properties [{0}] in CLR object '{1}'.",
* CustomUtils.FormatCsvString(memberCandidates.Select(m => m.ToString())), clrObjectType.Name
* ));
*/
}
}
foreach (CustomEntitySetType entitySet in collectedEntitySets)
{
workspace.Add(entitySet);
}
FixUpDeferredForeignKeyMetadata(workspace, deferredForeignKeys);
FixUpDeferredRelationshipMetadata(workspace, deferredRelationships);
workspace.ValidateAndLock();
return(workspace);
}