/// <summary>Create instance of MetaTable rows class</summary>
/// <param name="table">Owner table</param>
/// <param name="rowIndex">Row index</param>
/// <param name="cells">Row cells array</param>
public MetaRow(MetaTable table, UInt32 rowIndex, MetaCell[] cells)
{
this._table = table;
this._rowIndex = rowIndex;
this._cells = cells;
}
/// <summary>Create instance of MetaTable cell class</summary>
/// <param name="table">Owner table</param>
/// <param name="column">Owner column</param>
/// <param name="rowIndex">Owner row index</param>
/// <param name="reader">Image reader pointed to cell value</param>
public MetaCell(MetaTable table, MetaColumn column, UInt32 rowIndex, BinaryReader reader)
{
if (table == null)
{
throw new ArgumentNullException("table");
}
if (column == null)
{
throw new ArgumentNullException("column");
}
if (reader == null)
{
throw new ArgumentNullException("reader");
}
this._table = table;
this._column = column;
this._rowIndex = rowIndex;
switch (this.Column.ColumnType)
{
case MetaColumnType.UInt16:
this._rawValue = reader.ReadUInt16();
this._value = (UInt16)this.RawValue;
break;
case MetaColumnType.UInt32:
this._rawValue = reader.ReadUInt32();
this._value = (UInt32)this.RawValue;
break;
case MetaColumnType.String:
this._rawValue = this.Table.Root.StreamTableHeader.StringIndexSize == 2 ? (UInt32)reader.ReadUInt16() : reader.ReadUInt32();
this._value = this.Table.Root.Parent.StringHeap[(Int32)this.RawValue];
break;
case MetaColumnType.Guid:
this._rawValue = this.Table.Root.StreamTableHeader.GuidIndexSize == 2 ? (UInt32)reader.ReadUInt16() : reader.ReadUInt32();
this._value = this.Table.Root.Parent.GuidHeap[(Int32)this.RawValue];
break;
case MetaColumnType.Blob:
this._rawValue = this.Table.Root.StreamTableHeader.BlobIndexSize == 2 ? (UInt32)reader.ReadUInt16() : reader.ReadUInt32();
this._value = this.Table.Root.Parent.BlobHeap[(Int32)this.RawValue];
break;
/*case MetaColumnType.UserString:
* this._value = this.Table.Root.MetaData.USHeap[(Int32)this.RawValue];
* break;*/
default:
if (this.Column.IsCellPointer) //Указатель на другую таблицу
{
MetaTable refTable = this.Table.Root[(Cor.MetaTableType) this.Column.ColumnType];
this._rawValue = ((refTable.RowsCount < 65536) ? reader.ReadUInt16() : reader.ReadUInt32());
this._value = new MetaCellPointer(this, this.RawValue);
//TODO: Не понял необходимость сдвига исходя из типа таблицы.
//this.RawValue = (((uint)this.Column.Type << 24) | ((refTable.RowsCount < 65536) ? reader.ReadUInt16() : reader.ReadUInt32()));
}
else if (this.Column.IsCodedToken) //Coded token
{ // Coded token (may need to be uncompressed from 2-byte form)
UInt32 codedToken = this.Table.SizeOfColumn(this.Column.ColumnType) == 2 ? reader.ReadUInt16() : reader.ReadUInt32();
MetaColumnType[] columns = MetaTable.GetCodedTokenTypes(this.Column.ColumnType);
Int32 tableIndex = ((Int32)codedToken) & ~(-1 << MetaCellCodedToken.CodedTokenBits[columns.Length]);
Int32 index = ((Int32)codedToken) >> MetaCellCodedToken.CodedTokenBits[columns.Length];
Int32 token = MetaCellCodedToken.ToToken(columns[tableIndex], index);
this._rawValue = (UInt32)token;
this._value = new MetaCellCodedToken(this, (UInt32)index, columns[tableIndex]);
//this._value = new MetaCellCodedToken(this, this.RawValue);
}
break;
}
}
