Package 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
- Author:
- Mark Taylor
-
-
Constructor Summary
Constructors Constructor Description ConstantColumn(ColumnInfo colinfo, java.lang.Object value)
Constructs a new column with a given metadata object and constant datum.
-
Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description 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
-
-
-
-
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 metadatavalue
- 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 classColumnData
- Parameters:
irow
- the row from which to retrieve the value- Returns:
- the value stored at irow
-
-