public bool TryRead(LogLineIndex sourceStartIndex, int count, ILogBuffer destination, int destinationIndex, bool requiresValidityCheck)
{
++_numReads;
_lastAccessTime = DateTime.UtcNow;
var pageSourceIndex = sourceStartIndex - _section.Index;
var range = new Int32Range(pageSourceIndex, count);
foreach (var column in _buffer.Columns)
{
if (destination.Contains(column))
{
destination.CopyFrom(column, destinationIndex, _buffer, range);
}
}
if (requiresValidityCheck)
{
if (_buffer.ContainsAnyDefault(Columns.Index, range))
{
return(false);
}
}
return(true);
}
public bool ContainsAny(T value, Int32Range range)
{
for (int i = 0; i < range.Count; ++i)
{
// TODO: Boxing/Unboxing is going to kill us here, we need a generic equality comparer here
if (Equals(_data[range.Offset + i], value))
{
return(true);
}
}
return(false);
}
public bool ContainsAny <T>(IColumnDescriptor <T> column, T value, Int32Range range)
{
if (column == null)
{
throw new ArgumentNullException(nameof(column));
}
if (!_dataByColumn.TryGetValue(column, out var data))
{
throw new ArgumentException(string.Format("No such column: {0}", column));
}
return(((ColumnData <T>)data).ContainsAny(value, range));
}
public bool ContainsAnyDefault(IColumnDescriptor column, Int32Range range)
{
if (column == null)
{
throw new ArgumentNullException(nameof(column));
}
if (!_dataByColumn.TryGetValue(column, out var data))
{
throw new ArgumentException(string.Format("No such column: {0}", column));
}
return(data.ContainsAnyDefault(range));
}
public bool ContainsAnyDefault(Int32Range range)
{
return(ContainsAny(_column.DefaultValue, range));
}