uk.ac.starlink.ttools.filter
Interface SupplementSequence

public interface SupplementSequence

Iterator over the data supplied by columns in an associated ColumnSupplement. An instance of this class is returned from ColumnSupplement.createSequence(uk.ac.starlink.table.RowSequence) method. Note that a RowSequence from a host table is associated with this object, and the cell/row data supplied by this object is in general generated by manipulating data orginally supplied by that underlying row sequence. In particular the data supplied by this object is always from the current row of the underlying RowSequence; the row index supplied to the getRow/getCell methods of this object is additional information, it is not to be used to request out of sequence values.

Since:

2 Apr 2012

Author:

Mark Taylor

See Also:

ColumnSupplement

Method Summary

Object	getCell(long irow, int icol) Returns a cell value from the current row of this sequence.
Object[]	getRow(long irow) Returns an array of cell values giving the current row of this sequence.

Method Detail

getCell

Object getCell(long irow,
               int icol)
               throws IOException

Returns a cell value from the current row of this sequence.

Parameters:

irow - current index of the sequence; supplied for information only, and not to be used for random access

icol - column index

Returns:

value of column icol at current sequence row

Throws:

IOException

getRow

Object[] getRow(long irow)
                throws IOException

Returns an array of cell values giving the current row of this sequence.

Parameters:

irow - current index of the sequence; supplied for information only, and not to be used for random access

Returns:

current sequence row

Throws:

IOException