public DeferredRelationshipMetadata(
Type clrObjectType,
CustomNavigationPropertyAttribute attribute,
CustomNavigationPropertyType navigationProperty
)
{
this.ClrObjectType = clrObjectType;
this.Attribute = attribute;
this.NavigationProperty = navigationProperty;
}
GetEntityNavigationProperties(
Type clrObjectType,
ICollection <EntityMemberCandidate> candidateList,
ICollection <DeferredRelationshipMetadata> deferredRelationships
)
{
var collectedNavidationProperties = new List <CustomNavigationPropertyType>();
var candidateArray = candidateList.ToArray();
foreach (var navigationPropertyCandidate in candidateArray)
{
var navigationPropertyAttribute =
TryGetAttribute <CustomNavigationPropertyAttribute>(
navigationPropertyCandidate.ClrProperty
);
if (null == navigationPropertyAttribute)
{
continue;
}
CustomRelationshipEndType from = new CustomRelationshipEndType();
CustomRelationshipEndType to = new CustomRelationshipEndType();
CustomNavigationPropertyType navigationProperty =
new CustomNavigationPropertyType(
navigationPropertyCandidate.NestedComplexTypePropertyPath,
navigationPropertyCandidate.ClrProperty,
navigationPropertyAttribute.IsNullable,
navigationPropertyAttribute.IsReadOnly,
from,
to
);
collectedNavidationProperties.Add(navigationProperty);
candidateList.Remove(navigationPropertyCandidate);
deferredRelationships.Add(
new DeferredRelationshipMetadata(
clrObjectType,
navigationPropertyAttribute,
navigationProperty
)
);
}
return(collectedNavidationProperties);
}
public void DefferedInitialization(
bool isPrimaryEnd,
CustomEntitySetType entitySetType,
CustomEntityType entityType,
CustomNavigationPropertyType relatedProperty,
CustomMultiplicity multiplicity
)
{
Debug.Assert(!_readonly);
_isPrimaryEnd = isPrimaryEnd;
_entitySetType = entitySetType;
_entityType = entityType;
_relatedProperty = relatedProperty;
_multiplicity = multiplicity;
_readonly = true;
}
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));;
}
}
}