EditableColumn (Starjava Table API)

java.lang.Object
- uk.ac.starlink.table.ColumnData
- - uk.ac.starlink.table.WrapperColumn
  - - uk.ac.starlink.table.EditableColumn

```
public class EditableColumn
extends WrapperColumn
```
A column which can be initialised from a given existing column, but whose cells can be written to. Whether the initialisation is done by copying the whole lot and creating a new column or by just keeping track of the changed elements is unspecified and down to the implementation. Modifications to the cell data or the metadata of this column will not affect the data/metadata of the base column.

Author:

Mark Taylor (Starlink)

Constructor Summary

Constructors
Constructor Description

EditableColumn(ColumnData base)
Constructs a new EditableColumn based on an existing column.

Constructors
Constructor	Description
`EditableColumn(ColumnData base)`	Constructs a new EditableColumn based on an existing column.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`boolean`	`isWritable()`	Returns `true`.
`java.lang.Object`	`readValue(long irow)`	Returns the value stored at a given row in this column.
`void`	`storeValue(long irow, java.lang.Object value)`	Stores a given value in a given row for this column.

Methods inherited from class uk.ac.starlink.table.ColumnData
getColumnInfo, setColumnInfo

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from class uk.ac.starlink.table.WrapperColumn
getBaseColumn

- Constructor Detail
  - EditableColumn
```
public EditableColumn(ColumnData base)
```
    Constructs a new EditableColumn based on an existing column.
- Method Detail
  - isWritable
```
public boolean isWritable()
```
    Returns true.
    
    Overrides:
    
    isWritable in class WrapperColumn
    
    Returns:
    
    whether cells can be edited. They can.
  - readValue
```
public java.lang.Object readValue(long irow)
                           throws java.io.IOException
```
    Description copied from class: ColumnData
    
    Returns the value stored at a given row in this column.
    
    Overrides:
    
    readValue in class WrapperColumn
    
    Parameters:
    
    irow - the row from which to retrieve the value
    
    Returns:
    
    the value stored at irow
    
    Throws:
    
    java.io.IOException - if there is some problem reading
  - storeValue
```
public void storeValue(long irow,
                       java.lang.Object value)
                throws java.io.IOException
```
    Description copied from class: ColumnData
    
    Stores a given value in a given row for this column. Will only work if the isWritable method returns true. The implementation in the ColumnData class throws an UnsupportedOperationException.
    
    Overrides:
    
    storeValue in class WrapperColumn
    
    Parameters:
    
    irow - the row to store it in
    
    value - the object to store
    
    Throws:
    
    java.io.IOException - if there is some problem writing

Class EditableColumn

Constructor Summary

Method Summary

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

Methods inherited from class java.lang.Object

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

Constructor Detail

EditableColumn

Method Detail

isWritable

readValue

storeValue