protected override void DoRead(IDataQueue queue)
{
try
{
using (CsvReader cr = CreateReader())
{
ITableStructure format = GetStructure(cr);
IEnumerable <string[]> reader = cr;
foreach (string[] row in reader)
{
queue.PutRecord(new ArrayDataRecord(format, row));
}
queue.PutEof();
}
}
catch (Exception e)
{
ProgressInfo.LogError(e);
queue.PutError(e);
}
finally
{
queue.CloseWriting();
}
FinalizeBulkCopy();
}
private void DoFillOnBackground(IDataQueue queue)
{
try
{
m_state = TabularDataViewState.Loading;
//DataTable curbuf = null;
Chunk curchunk = null;
try
{
while (!queue.IsEof)
{
if (curchunk == null)
{
curchunk = new Chunk();
}
IBedRecord rec = queue.GetRecord();
curchunk.SaveRecord(rec);
if (curchunk.Count >= BUFFER_SIZE)
{
FlushChunk(curchunk);
curchunk = null;
}
}
}
finally
{
queue.CloseReading();
}
if (curchunk != null)
{
FlushChunk(curchunk);
}
m_state = TabularDataViewState.Prepared;
}
catch (Exception e)
{
Errors.Report(e);
m_state = TabularDataViewState.Error;
queue.PutError(e);
}
finally
{
queue.CloseWriting();
}
if (LoadedNextData != null)
{
LoadedNextData(this, new LoadedNextDataArgs(m_serializedRows));
}
}
/// <summary>
/// reads content of input file into given data queue
/// </summary>
/// <param name="queue"></param>
protected override void DoRead(IDataQueue queue)
{
DbfFile dbf = null;
try
{
dbf = OpenReader();
ITableStructure format = GetStructure(dbf);
DbfRecord irec = new DbfRecord(dbf.Header);
// for each record in input DBF
while (dbf.ReadNext(irec))
{
if (irec.IsDeleted)
{
continue;
}
object[] vals = new object[format.Columns.Count];
for (int i = 0; i < format.Columns.Count; i++)
{
vals[i] = irec[i];
}
var orec = new ArrayDataRecord(format, vals);
queue.PutRecord(new ArrayDataRecord(format, vals));
}
queue.PutEof();
}
catch (Exception e)
{
ProgressInfo.LogError(e);
queue.PutError(e);
}
finally
{
if (dbf != null)
{
dbf.Close();
}
queue.CloseWriting();
}
FinalizeBulkCopy();
}
public static void LoadQueue(Stream fr, IDataQueue queue)
{
try
{
BinaryReader br = new BinaryReader(fr);
int sgn = br.ReadInt32();
if (sgn != SIGNATURE)
{
throw new InternalError("DAE-00021 Bad BED file");
}
int ver = br.ReadInt32();
if (ver != 1 && ver != 2)
{
throw new InternalError("DAE-00022 Bad BED file");
}
int colcnt = br.Read7BitEncodedInt();
TableStructure ts = new TableStructure();
PrimaryKey pk = new PrimaryKey();
for (int i = 0; i < colcnt; i++)
{
ColumnStructure col = new ColumnStructure();
col.ColumnName = br.ReadString();
if (ver >= 2)
{
var type = (TypeStorage)br.ReadByte();
col.DataType = type.GetDatAdminType();
var flags = (ColFlags)br.ReadByte();
if ((flags & ColFlags.ISPK) != 0)
{
pk.Columns.Add(new ColumnReference(col.ColumnName));
}
}
ts._Columns.Add(col);
}
if (pk.Columns.Count > 0)
{
ts._Constraints.Add(pk);
}
for (; ;)
{
int len = br.Read7BitEncodedInt();
if (len < 0)
{
break;
}
var rec = LoadRecord(br, ts);
queue.PutRecord(rec);
}
queue.PutEof();
}
catch (Exception e)
{
Errors.Report(e);
queue.PutError(e);
}
finally
{
queue.CloseWriting();
}
}
