prefuse.data.column
Class ConstantColumn

java.lang.Object
  prefuse.data.column.AbstractColumn
      prefuse.data.column.ConstantColumn

All Implemented Interfaces:

Column

public class ConstantColumn
extends AbstractColumn

Column implementation holding a single, constant value for all rows.

Author:

jeffrey heer

Field Summary

Fields inherited from class prefuse.data.column.AbstractColumn

m_columnType, m_defaultValue, m_listeners, m_parser, m_readOnly

Constructor Summary

ConstantColumn(java.lang.Class type, java.lang.Object defaultValue)
Create a new ConstantColumn.

Method Summary

void	addColumnListener(ColumnListener listener) Does nothing.
boolean	canSet(java.lang.Class type) Returns false.
java.lang.Object	get(int row) Get the data value at the specified row
int	getRowCount() Returns the number of rows in this data column
void	removeColumnListener(ColumnListener listener) Does nothing.
void	set(java.lang.Object val, int row) Unsupported operation.
void	setMaximumRow(int nrows) Sets the number of rows in this data column

Methods inherited from class prefuse.data.column.AbstractColumn

canGet, canGetBoolean, canGetDate, canGetDouble, canGetFloat, canGetInt, canGetLong, canGetString, canSetBoolean, canSetDate, canSetDouble, canSetFloat, canSetInt, canSetLong, canSetString, fireColumnEvent, fireColumnEvent, fireColumnEvent, fireColumnEvent, fireColumnEvent, fireColumnEvent, fireColumnEvent, getBoolean, getColumnType, getDate, getDefaultValue, getDouble, getFloat, getInt, getLong, getParser, getString, isCellEditable, isReadOnly, revertToDefault, setBoolean, setDate, setDefaultValue, setDouble, setFloat, setInt, setLong, setParser, setReadOnly, setString

Methods inherited from class java.lang.Object

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

Constructor Detail

ConstantColumn

public ConstantColumn(java.lang.Class type,
                      java.lang.Object defaultValue)

Create a new ConstantColumn.

Parameters:

type - the data type of this column

defaultValue - the default value used for all rows

Method Detail

getRowCount

public int getRowCount()

Description copied from interface: Column

Returns the number of rows in this data column

Returns:

the number of rows

See Also:

Column.getRowCount()

setMaximumRow

public void setMaximumRow(int nrows)

Description copied from interface: Column

Sets the number of rows in this data column

Parameters:

nrows - the number of rows

See Also:

Column.setMaximumRow(int)

get

public java.lang.Object get(int row)

Description copied from interface: Column

Get the data value at the specified row

Parameters:

row - the row from which to retrieve the value

Returns:

the data value

See Also:

Column.get(int)

set

public void set(java.lang.Object val,
                int row)
         throws DataTypeException

Unsupported operation.

Parameters:

val - the value to set

row - the row at which to set the value

Throws:

DataTypeException

See Also:

Column.set(java.lang.Object, int)

canSet

public boolean canSet(java.lang.Class type)

Returns false.

Specified by:

canSet in interface Column

Overrides:

canSet in class AbstractColumn

Parameters:

type - the Class of the data type to check

Returns:

true if the type is supported by this column, false otherwise

See Also:

Column.canSet(java.lang.Class)

addColumnListener

public void addColumnListener(ColumnListener listener)

Does nothing.

Specified by:

addColumnListener in interface Column

Overrides:

addColumnListener in class AbstractColumn

Parameters:

listener - the ColumnListener to add

See Also:

Column.addColumnListener(prefuse.data.event.ColumnListener)

removeColumnListener

public void removeColumnListener(ColumnListener listener)

Does nothing.

Specified by:

removeColumnListener in interface Column

Overrides:

removeColumnListener in class AbstractColumn

Parameters:

listener - the ColumnListener to remove

See Also:

Column.removeColumnListener(prefuse.data.event.ColumnListener)