public override BedTable GetPreviewRows(int count)
{
var props = new TablePageProperties {
Count = count
};
return(m_frame.TabularData.LoadTableData(props));
}
public BedTable LoadTableData(TablePageProperties props)
{
lock (m_directory)
{
BedTable table = new BedTable(m_table);
int start = 0;
int count = m_serializedRows;
if (props.Count != null)
{
count = props.Count.Value;
}
if (props.Start != null)
{
start = props.Start.Value;
}
if (start >= m_serializedRows)
{
return(table);
}
int curdic = start / BUFFER_SIZE, skiprec = start % BUFFER_SIZE;
Errors.Assert(curdic < m_directory.Count);
m_cache.Seek(m_directory[curdic], SeekOrigin.Begin);
int availtables = m_directory.Count - curdic;
BinaryReader br = new BinaryReader(m_cache);
while (table.Rows.Count < count && availtables >= 1)
{
ChunkInfo info = ChunkInfo.LoadInfo(br);
if (skiprec > 0)
{
int skipbytes = 0;
for (int i = 0; i < skiprec; i++)
{
skipbytes += info.Lengths[i];
}
m_cache.Seek(skipbytes, SeekOrigin.Current);
}
int rec = skiprec;
while (rec < info.Count)
{
table.AddRowInternal(BedTool.LoadRecord(br, m_table));
rec++;
}
availtables--;
skiprec = 0;
}
return(table);
}
}
public BedTable LoadTableData(TablePageProperties props)
{
WantTable();
return(m_table.ToBinaryTable());
}
public BedTable LoadTableData(TablePageProperties props)
{
DateTime start = DateTime.Now;
var per = props.Perspective;
try
{
BedAdapter adapter;
string cmdtext;
LoadTableDataProlog(props, out adapter, out cmdtext);
using (var canc = Connection.AddOnCancel(adapter.CancelLoading))
{
BedTable table = null;
try
{
table = adapter.LoadTableData(props.Start, props.Count, cmdtext);
}
catch (Exception err)
{
LoadTableDataPrologHandleError(props, err);
}
var slen = DateTime.Now - start;
double len = slen.TotalSeconds;
if (table != null)
{
ProgressInfo.Debug(Texts.Get("s_readed$rows$cols$len",
"rows", table.Rows.Count,
"cols", table.Structure.Columns.Count,
"len", len.ToString("0.00")));
}
m_adapterByTable[table] = adapter;
if (per != null)
{
table.ResultFields = per.Select.Columns;
}
if (LoadedDataInfo != null)
{
var ea = new LoadedTableInfoArgs();
ea.Duration = slen;
ea.Table = table;
LoadedDataInfo(this, ea);
}
return(table);
}
}
catch (Exception err)
{
// probably error in command, clear adapter so that it is recreated next time
m_adapters.Remove(per ?? nullPer);
if (LoadedDataInfo != null)
{
var ea = new LoadedTableInfoArgs();
ea.Duration = DateTime.Now - start;
ea.Error = err;
LoadedDataInfo(this, ea);
}
throw;
}
}
public BedTable LoadTableData(TablePageProperties props)
{
return(m_table);
}