public Cursor(TransposeLoader parent, Func <int, bool> pred)
: base(parent._host)
{
_parent = parent;
Ch.AssertValue(pred);
// We should only have instantiated this cursor if we have that
// col transposers array, and we don't have row data in the file.
Ch.AssertValue(_parent._colTransposers);
Ch.AssertValue(_parent._colTransposersLock);
Ch.Assert(!_parent.HasRowData);
Utils.BuildSubsetMaps(_parent._header.ColumnCount, pred, out _actives, out _colToActivesIndex);
_transCursors = new ICursor[_actives.Length];
_getters = new Delegate[_actives.Length];
// The following will fill in both the _transCursors and _getters arrays.
for (int i = 0; i < _actives.Length; ++i)
{
Init(_actives[i]);
}
}
public SchemaImpl(TransposeLoader parent)
{
Contracts.AssertValue(parent);
_parent = parent;
var view = parent._schemaEntry.GetView().Schema;
}
/// <summary>
/// Returns an empty sub-IDV entry for the no-file case.
/// </summary>
public TransposedSubIdv(TransposeLoader parent, int col)
: base(parent)
{
_col = col;
}
public SchemaSubIdv(TransposeLoader parent, IDataView view)
: base(parent)
{
_view = view;
}
/// <summary>
/// Constructs an empty table of contents entry, with no offset.
/// </summary>
private SubIdvEntry(TransposeLoader parent)
{
Contracts.AssertValue(parent);
_parent = parent;
}