Class BlankColumn


  • public class BlankColumn
    extends ColumnData
    Represents a column with metadata but no data. Every cell returns null, and is not writable.
    Since:
    28 Oct 2004
    Author:
    Mark Taylor (Starlink)
    • Constructor Detail

      • BlankColumn

        public BlankColumn​(ColumnInfo colinfo)
        Constructs a new column based on a given column metadata object.
        Parameters:
        colinfo - metadata for column
    • Method Detail

      • readValue

        public java.lang.Object readValue​(long irow)
        Returns column value, which is always null.
        Specified by:
        readValue in class ColumnData
        Parameters:
        irow - row index
        Returns:
        null