uk.ac.starlink.table
Class ConstantColumn

java.lang.Object
  uk.ac.starlink.table.ColumnData
      uk.ac.starlink.table.ConstantColumn

public class ConstantColumn
extends ColumnData

Represents a column which has the same value in every row.

Since:

19 Sep 2006

Constructor Summary

ConstantColumn(ColumnInfo colinfo, java.lang.Object value)
Constructs a new column with a given metadata object and constant datum.

Method Summary

java.lang.Object

readValue(long irow) Returns the value stored at a given row in this column.

Methods inherited from class uk.ac.starlink.table.ColumnData

getColumnInfo, isWritable, setColumnInfo, storeValue

Methods inherited from class java.lang.Object

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

Constructor Detail

ConstantColumn

public ConstantColumn(ColumnInfo colinfo,
                      java.lang.Object value)

Constructs a new column with a given metadata object and constant datum.

Parameters:

colinfo - column metadata

value - value to be found in every cell of this column

Method Detail

readValue

public java.lang.Object readValue(long irow)

Description copied from class: ColumnData

Returns the value stored at a given row in this column.

Specified by:

readValue in class ColumnData

Parameters:

irow - the row from which to retrieve the value

Returns:

the value stored at irow