Package uk.ac.starlink.table

Class EmptyRowSequence

  • All Implemented Interfaces:
    RowSequence
    public class EmptyRowSequence
extends java.lang.Object
implements RowSequence
    Row sequence implementation which has no rows. Singleton impelementation.
    Since:
    28 Oct 2004
    Author:
    Mark Taylor (Starlink)

    • Method Summary

      All Methods Static Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void close()
      Does nothing.
      java.lang.Object getCell​(int icol)
      Always throws IllegalStateException.
      static EmptyRowSequence getInstance()
      Returns singleton instance of this class.
      java.lang.Object[] getRow()
      Always throws IllegalStateException.
      boolean next()
      Always returns false.

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Method Detail

      • next

        public boolean next()
        Always returns false.
        Specified by:
        next in interface RowSequence
        Returns:
        true iff this sequence has been advanced to the next row

      • getCell

        public java.lang.Object getCell​(int icol)
        Always throws IllegalStateException.
        Specified by:
        getCell in interface RowSequence
        Returns:
        the contents of cell icol in the current row

      • getRow

        public java.lang.Object[] getRow()
        Always throws IllegalStateException.
        Specified by:
        getRow in interface RowSequence
        Returns:
        an array of the objects in each cell in row irow

      • close

        public void close()
        Does nothing.
        Specified by:
        close in interface RowSequence

      • getInstance

        public static EmptyRowSequence getInstance()
        Returns singleton instance of this class.
        Returns:
        instance