/// <summary> /// Creates descriptor instance. /// </summary> /// <param name="mappingSchema">Mapping schema, associated with descriptor.</param> /// <param name="columnAttribute">Column attribute, from which descriptor data should be extracted.</param> /// <param name="memberAccessor">Column mapping member accessor.</param> public ColumnDescriptor(MappingSchema mappingSchema, ColumnAttribute columnAttribute, MemberAccessor memberAccessor) { MemberAccessor = memberAccessor; MemberInfo = memberAccessor.MemberInfo; if (MemberInfo.IsFieldEx()) { var fieldInfo = (FieldInfo)MemberInfo; MemberType = fieldInfo.FieldType; } else if (MemberInfo.IsPropertyEx()) { var propertyInfo = (PropertyInfo)MemberInfo; MemberType = propertyInfo.PropertyType; } MemberName = columnAttribute.MemberName ?? MemberInfo.Name; ColumnName = columnAttribute.Name ?? MemberInfo.Name; Storage = columnAttribute.Storage; PrimaryKeyOrder = columnAttribute.PrimaryKeyOrder; IsDiscriminator = columnAttribute.IsDiscriminator; DataType = columnAttribute.DataType; DbType = columnAttribute.DbType; CreateFormat = columnAttribute.CreateFormat; if (columnAttribute.HasLength()) { Length = columnAttribute.Length; } if (columnAttribute.HasPrecision()) { Precision = columnAttribute.Precision; } if (columnAttribute.HasScale()) { Scale = columnAttribute.Scale; } if (Storage == null) { StorageType = MemberType; StorageInfo = MemberInfo; } else { var expr = Expression.PropertyOrField(Expression.Constant(null, MemberInfo.DeclaringType), Storage); StorageType = expr.Type; StorageInfo = expr.Member; } var defaultCanBeNull = false; if (columnAttribute.HasCanBeNull()) { CanBeNull = columnAttribute.CanBeNull; } else { var na = mappingSchema.GetAttribute <NullableAttribute>(MemberAccessor.TypeAccessor.Type, MemberInfo, attr => attr.Configuration); if (na != null) { CanBeNull = na.CanBeNull; } else { CanBeNull = mappingSchema.GetCanBeNull(MemberType); defaultCanBeNull = true; } } if (columnAttribute.HasIsIdentity()) { IsIdentity = columnAttribute.IsIdentity; } else if (MemberName.IndexOf(".") < 0) { var a = mappingSchema.GetAttribute <IdentityAttribute>(MemberAccessor.TypeAccessor.Type, MemberInfo, attr => attr.Configuration); if (a != null) { IsIdentity = true; } } SkipOnInsert = columnAttribute.HasSkipOnInsert() ? columnAttribute.SkipOnInsert : IsIdentity; SkipOnUpdate = columnAttribute.HasSkipOnUpdate() ? columnAttribute.SkipOnUpdate : IsIdentity; if (defaultCanBeNull && IsIdentity) { CanBeNull = false; } if (columnAttribute.HasIsPrimaryKey()) { IsPrimaryKey = columnAttribute.IsPrimaryKey; } else if (MemberName.IndexOf(".") < 0) { var a = mappingSchema.GetAttribute <PrimaryKeyAttribute>(MemberAccessor.TypeAccessor.Type, MemberInfo, attr => attr.Configuration); if (a != null) { IsPrimaryKey = true; PrimaryKeyOrder = a.Order; } } if (DbType == null || DataType == DataType.Undefined) { var a = mappingSchema.GetAttribute <DataTypeAttribute>(MemberAccessor.TypeAccessor.Type, MemberInfo, attr => attr.Configuration); if (a != null) { if (DbType == null) { DbType = a.DbType; } if (DataType == DataType.Undefined && a.DataType.HasValue) { DataType = a.DataType.Value; } } } }