/// <summary>
/// Returns a Model type usage for a provider type
/// </summary>
/// <returns>model (CSpace) type usage</returns>
internal TypeUsage GetModelTypeUsage()
{
if (_modelTypeUsage == null)
{
EdmType edmType = this.EdmType;
// If the edm type is already a cspace type, return the same type
if (edmType.DataSpace == DataSpace.CSpace || edmType.DataSpace == DataSpace.OSpace)
{
return(this);
}
TypeUsage result;
if (Helper.IsRowType(edmType))
{
RowType sspaceRowType = (RowType)edmType;
EdmProperty[] properties = new EdmProperty[sspaceRowType.Properties.Count];
for (int i = 0; i < properties.Length; i++)
{
EdmProperty sspaceProperty = sspaceRowType.Properties[i];
TypeUsage newTypeUsage = sspaceProperty.TypeUsage.GetModelTypeUsage();
properties[i] = new EdmProperty(sspaceProperty.Name, newTypeUsage);
}
RowType edmRowType = new RowType(properties, sspaceRowType.InitializerMetadata);
result = TypeUsage.Create(edmRowType, this.Facets);
}
else if (Helper.IsCollectionType(edmType))
{
CollectionType sspaceCollectionType = ((CollectionType)edmType);
TypeUsage newTypeUsage = sspaceCollectionType.TypeUsage.GetModelTypeUsage();
result = TypeUsage.Create(new CollectionType(newTypeUsage), this.Facets);
}
else if (Helper.IsRefType(edmType))
{
System.Diagnostics.Debug.Assert(((RefType)edmType).ElementType.DataSpace == DataSpace.CSpace);
result = this;
}
else if (Helper.IsPrimitiveType(edmType))
{
result = ((PrimitiveType)edmType).ProviderManifest.GetEdmType(this);
if (result == null)
{
throw EntityUtil.ProviderIncompatible(System.Data.Entity.Strings.Mapping_ProviderReturnsNullType(this.ToString()));
}
if (!TypeSemantics.IsNullable(this))
{
result = TypeUsage.Create(result.EdmType,
OverrideFacetValues(result.Facets,
new FacetValues {
Nullable = false
}));
}
}
else if (Helper.IsEntityTypeBase(edmType) || Helper.IsComplexType(edmType))
{
result = this;
}
else
{
System.Diagnostics.Debug.Assert(false, "Unexpected type found in entity data reader");
return(null);
}
System.Threading.Interlocked.CompareExchange(ref _modelTypeUsage, result, null);
}
return(_modelTypeUsage);
}