org.jfree.data

Class KeyedObjects2D

java.lang.Object

org.jfree.data.KeyedObjects2D

All Implemented Interfaces:

Serializable, Cloneable

public class KeyedObjects2D
extends Object
implements Cloneable, Serializable

A data structure that stores zero, one or many objects, where each object is associated with two keys (a 'row' key and a 'column' key).

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
KeyedObjects2D() Creates a new instance (initially empty).

Method Summary

Modifier and Type	Method and Description
void	addObject(Object object, Comparable rowKey, Comparable columnKey) Adds an object to the table.
void	clear() Clears all the data and associated keys.
Object	clone() Returns a clone.
boolean	equals(Object obj) Tests this object for equality with an arbitrary object.
int	getColumnCount() Returns the column count.
int	getColumnIndex(Comparable key) Returns the column index for a given key, or -1 if the key is not recognised.
Comparable	getColumnKey(int column) Returns the key for a given column.
List	getColumnKeys() Returns the column keys.
Object	getObject(Comparable rowKey, Comparable columnKey) Returns the object for the given row and column keys.
Object	getObject(int row, int column) Returns the object for a given row and column.
int	getRowCount() Returns the row count.
int	getRowIndex(Comparable key) Returns the row index for a given key, or -1 if the key is not recognised.
Comparable	getRowKey(int row) Returns the key for a given row.
List	getRowKeys() Returns the row keys.
int	hashCode() Returns a hashcode for this object.
void	removeColumn(Comparable columnKey) Removes an entire column from the table.
void	removeColumn(int columnIndex) Removes an entire column from the table.
void	removeObject(Comparable rowKey, Comparable columnKey) Removes an object from the table by setting it to null.
void	removeRow(Comparable rowKey) Removes an entire row from the table.
void	removeRow(int rowIndex) Removes an entire row from the table.
void	setObject(Object object, Comparable rowKey, Comparable columnKey) Adds or updates an object.

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

KeyedObjects2D

public KeyedObjects2D()

Creates a new instance (initially empty).

Method Detail

getRowCount

public int getRowCount()

Returns the row count.

Returns:

The row count.

See Also:

getColumnCount()

getColumnCount

public int getColumnCount()

Returns the column count.

Returns:

The column count.

See Also:

getRowCount()

getObject

public Object getObject(int row,
                        int column)

Returns the object for a given row and column.

Parameters:

row - the row index (in the range 0 to getRowCount() - 1).

column - the column index (in the range 0 to getColumnCount() - 1).

Returns:

The object (possibly null).

See Also:

getObject(Comparable, Comparable)

getRowKey

public Comparable getRowKey(int row)

Returns the key for a given row.

Parameters:

row - the row index (zero based).

Returns:

The row index.

See Also:

getRowIndex(Comparable)

getRowIndex

public int getRowIndex(Comparable key)

Returns the row index for a given key, or -1 if the key is not recognised.

Parameters:

key - the key (null not permitted).

Returns:

The row index.

See Also:

getRowKey(int)

getRowKeys

public List getRowKeys()

Returns the row keys.

Returns:

The row keys (never null).

See Also:

getRowKeys()

getColumnKey

public Comparable getColumnKey(int column)

Returns the key for a given column.

Parameters:

column - the column.

Returns:

The key.

See Also:

getColumnIndex(Comparable)

getColumnIndex

public int getColumnIndex(Comparable key)

Returns the column index for a given key, or -1 if the key is not recognised.

Parameters:

key - the key (null not permitted).

Returns:

The column index.

See Also:

getColumnKey(int)

getColumnKeys

public List getColumnKeys()

Returns the column keys.

Returns:

The column keys (never null).

See Also:

getRowKeys()

getObject

public Object getObject(Comparable rowKey,
                        Comparable columnKey)

Returns the object for the given row and column keys.

Parameters:

rowKey - the row key (null not permitted).

columnKey - the column key (null not permitted).

Returns:

The object (possibly null).

Throws:

IllegalArgumentException - if rowKey or columnKey is null.

UnknownKeyException - if rowKey or columnKey is not recognised.

addObject

public void addObject(Object object,
                      Comparable rowKey,
                      Comparable columnKey)

Adds an object to the table. Performs the same function as setObject().

Parameters:

object - the object.

rowKey - the row key (null not permitted).

columnKey - the column key (null not permitted).

setObject

public void setObject(Object object,
                      Comparable rowKey,
                      Comparable columnKey)

Adds or updates an object.

Parameters:

object - the object.

rowKey - the row key (null not permitted).

columnKey - the column key (null not permitted).

removeObject

public void removeObject(Comparable rowKey,
                         Comparable columnKey)

Removes an object from the table by setting it to null. If all the objects in the specified row and/or column are now null, the row and/or column is removed from the table.

Parameters:

rowKey - the row key (null not permitted).

columnKey - the column key (null not permitted).

See Also:

addObject(Object, Comparable, Comparable)

removeRow

public void removeRow(int rowIndex)

Removes an entire row from the table.

Parameters:

rowIndex - the row index.

See Also:

removeColumn(int)

removeRow

public void removeRow(Comparable rowKey)

Removes an entire row from the table.

Parameters:

rowKey - the row key (null not permitted).

Throws:

UnknownKeyException - if rowKey is not recognised.

See Also:

removeColumn(Comparable)

removeColumn

public void removeColumn(int columnIndex)

Removes an entire column from the table.

Parameters:

columnIndex - the column index.

See Also:

removeRow(int)

removeColumn

public void removeColumn(Comparable columnKey)

Removes an entire column from the table.

Parameters:

columnKey - the column key (null not permitted).

Throws:

UnknownKeyException - if rowKey is not recognised.

See Also:

removeRow(Comparable)

clear

public void clear()

Clears all the data and associated keys.

Since:

1.0.7

equals

public boolean equals(Object obj)

Tests this object for equality with an arbitrary object.

Overrides:

equals in class Object

Parameters:

obj - the object to test (null permitted).

Returns:

A boolean.

hashCode

public int hashCode()

Returns a hashcode for this object.

Overrides:

hashCode in class Object

Returns:

A hashcode.

clone

public Object clone()
             throws CloneNotSupportedException

Returns a clone.

Overrides:

clone in class Object

Returns:

A clone.

Throws:

CloneNotSupportedException - this class will not throw this exception, but subclasses (if any) might.