this.lastRowIndex = -1;
	public RowSaveUtil( int rowCount, OutputStream rowExprsOs,			OutputStream rowLenOs, Set exprNameSet )	{		this.rowCount = rowCount;		this.exprNameSet = exprNameSet;				this.rowExprsDos = new DataOutputStream( rowExprsOs );		this.rowLenDos = new DataOutputStream( rowLenOs );	}