public override BulkCopyRowsCopied BulkCopy <T>(DataConnection dataConnection, BulkCopyOptions options, IEnumerable <T> source)
{
if (_bulkCopy == null)
{
_bulkCopy = new OracleBulkCopy(this, GetConnectionType());
}
IList <T> sourceList = null;
if (options.RetrieveSequence)
{
var entityDescriptor = dataConnection.MappingSchema.GetEntityDescriptor(typeof(T));
bool foundIdentityColumn = false;
foreach (ColumnDescriptor column in entityDescriptor.Columns)
{
foundIdentityColumn = foundIdentityColumn || column.IsIdentity;
var sequenceName = column.MemberInfo
.GetCustomAttributesEx(typeof(SequenceNameAttribute), true)
.OfType <SequenceNameAttribute>()
.Select(a => a.SequenceName)
.FirstOrDefault(s => !string.IsNullOrEmpty(s));
if (!string.IsNullOrWhiteSpace(sequenceName))
{
sourceList = sourceList ?? source.ToList();
var sequences = ReserveSequenceValues(dataConnection, sourceList.Count, sequenceName);
for (var i = 0; i < sourceList.Count; i++)
{
var item = sourceList[i];
var value = Converter.ChangeType(sequences[i], column.MemberType);
column.MemberAccessor.SetValue(item, value);
}
}
}
options.KeepIdentity = foundIdentityColumn;
}
return(_bulkCopy.BulkCopy(
options.BulkCopyType == BulkCopyType.Default ? OracleTools.DefaultBulkCopyType : options.BulkCopyType,
dataConnection,
options,
sourceList ?? source));
}