//internal void ReadRecord(GenericFormRecord record, bool lazyLoading)
//{
// ChangeState(States.Reading, s => s == States.Indexing);
// DoReadRecord(record, lazyLoading);
// ChangeState(States.Indexing);
//}
internal void ReadRecordAt(long position, GenericFormRecord record, bool lazyLoading)
{
ChangeState(States.Reading, s => s != States.Reading);
if (segmentStack.Count > 0)
{
Log.Warning("Cleared unfinished stack left from previous reading");
segmentStack.Clear();
}
BaseStream.Position = position;
RecordMetadata recordMetaData = context.CreateRecordMetaData();
NextSegment(recordMetaData);
record.RawFlags = recordMetaData.Flags;
record.Version = recordMetaData.Version;
DoReadRecord(record, lazyLoading);
// Prevent segment errors due no reading all record content
// during selective property reading
if (lazyLoading)
{
SeekEndOfSegment();
}
EndSegment();
ChangeState(States.Ready);
}
internal void WriteRecord(GenericFormRecord record, uint formId)
{
if (header == null)
{
throw new InvalidOperationException("Header not yet written");
}
FormKind formKind = (FormKind)InfoProvider.GetRecordInfo(record.GetType()).Signature;
if (formKind != currentGroupFormKind)
{
// End existing group if one has begun
if (currentGroupFormKind != FormKind.Any)
{
EndSegment();
}
currentGroupFormKind = formKind;
BeginGroupSegment(currentGroupFormKind);
numRecords++;
}
// Convert global context Form ID to local relative Form ID
uint localFormId = ReferenceMapper.ContexToLocal(formId);
DoWriteRecord(record, localFormId);
numRecords++;
}
private void DoReadRecord(GenericFormRecord record, bool lazyLoading)
{
RecordInfo recinf = InfoProvider.GetRecordInfo(record.GetType());
if (record.GetType() != typeof(DummyRecord) && recinf.Signature != CurrentSegment.Signature)
{
throw new InvalidOperationException("Record signature mismatch.");
}
if (record.IsRecordCompressed)
{
// TODO: Intermediate MomeryStream may not be needed here
long decompressedSize = ReadUInt32();
byte[] compressedData = ReadBytesToEnd();
Stream compressedStream = new MemoryStream(compressedData);
Stream deflateStream = new CustomDeflateStream(compressedStream, decompressedSize);
using (RecordReader deflateReader = context.CreateReader(deflateStream))
{
deflateReader.CurrentState = States.Reading;
// Copy flags etc to the deflate reader
deflateReader.PluginFlags = PluginFlags;
deflateReader.ReferenceMapper = ReferenceMapper;
deflateReader.StringLocator = StringLocator;
// Read record form the deflate reader
deflateReader.CurrentRecord = record;
record.ReadRecord(deflateReader, lazyLoading);
deflateReader.CurrentRecord = null;
}
}
else
{
// Read record form the current reader
CurrentRecord = record;
record.ReadRecord(this, lazyLoading);
CurrentRecord = null;
}
}