public virtual DbTypeInfo GetDbTypeInfo(EntityMemberInfo forMember)
{
var colType = forMember.DataType.GetUnderlyingStorageClrType();
if (DbTypesByClrType.TryGetValue(colType, out var typeInfo))
{
return(typeInfo);
}
// direct mapping by col type (CLR type) not found.
DbTypeDef storageType = null;
// find by value kind
var mappedTo = GetDbSpecialType(colType, forMember);
if (mappedTo != DbSpecialType.None)
{
SpecialTypeDefs.TryGetValue(mappedTo, out storageType);
}
// if not found try by col type
if (storageType == null)
{
TypeDefsByColumnOutType.TryGetValue(colType, out storageType);
}
if (storageType == null)
{
return(null);
}
// found storage type; try default mapping
if (storageType.DefaultTypeInfo != null)
{
return(storageType.DefaultTypeInfo);
}
// create new mapping
return(CreateDbTypeInfo(colType, storageType, forMember.Size, forMember.Precision, forMember.Scale));
}
// this method is used at runtime in LINQ queries
public virtual DbTypeDef GetDbTypeDef(Type dataType)
{
var colType = dataType.GetUnderlyingStorageClrType();
if (DbTypesByClrType.TryGetValue(colType, out DbTypeInfo typeInfo))
{
return(typeInfo.TypeDef);
}
// for string make quick lookup
if (colType == typeof(string) && SpecialTypeDefs.TryGetValue(DbSpecialType.String, out var typeDef))
{
return(typeDef);
}
// make plain search for matching type
return(TypeDefsByName.Values.FirstOrDefault(td => td.ColumnOutType == colType && !td.Flags.IsSet(DbTypeFlags.Unlimited)));
}
