org.jfree.data
Class DefaultKeyedValueDataset

java.lang.Object
  |
  +--org.jfree.data.AbstractDataset
        |
        +--org.jfree.data.DefaultKeyedValueDataset

All Implemented Interfaces:

Dataset, KeyedValue, KeyedValueDataset, java.io.Serializable, Value

public class DefaultKeyedValueDataset

extends AbstractDataset

implements KeyedValueDataset, java.io.Serializable

A default implementation of the KeyedValueDataset interface.

Author:

David Gilbert

See Also:

Serialized Form

Constructor Summary

DefaultKeyedValueDataset()
Constructs a new dataset, initially empty.

DefaultKeyedValueDataset(java.lang.Comparable key, java.lang.Number value)
Creates a new dataset with the specified initial value.

DefaultKeyedValueDataset(KeyedValue data)
Creates a new dataset that uses the data from a KeyedValue instance.

Method Summary

boolean	equals(java.lang.Object obj) Tests this dataset for equality with an arbitrary object.
java.lang.Comparable	getKey() Returns the key associated with the value.
java.lang.Number	getValue() Returns the value.
void	setValue(java.lang.Comparable key, java.lang.Number value) Sets the value for the dataset.
void	updateValue(java.lang.Number value) Updates the value.

Methods inherited from class org.jfree.data.AbstractDataset

addChangeListener, fireDatasetChanged, getGroup, notifyListeners, removeChangeListener, setGroup

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.jfree.data.Dataset

addChangeListener, getGroup, removeChangeListener, setGroup

Constructor Detail

DefaultKeyedValueDataset

public DefaultKeyedValueDataset()

Constructs a new dataset, initially empty.

DefaultKeyedValueDataset

public DefaultKeyedValueDataset(java.lang.Comparable key,
                                java.lang.Number value)

Creates a new dataset with the specified initial value.

Parameters:

key - the key.

value - the value.

DefaultKeyedValueDataset

public DefaultKeyedValueDataset(KeyedValue data)

Creates a new dataset that uses the data from a KeyedValue instance.

Parameters:

data - the data.

Method Detail

getKey

public java.lang.Comparable getKey()

Returns the key associated with the value.

Specified by:

getKey in interface KeyedValue

Returns:

the key.

getValue

public java.lang.Number getValue()

Returns the value.

Specified by:

getValue in interface Value

Returns:

the value.

updateValue

public void updateValue(java.lang.Number value)

Updates the value.

Parameters:

value - the new value (null permitted).

setValue

public void setValue(java.lang.Comparable key,
                     java.lang.Number value)

Sets the value for the dataset. After the change is made, a DatasetChangeEvent is sent to all registered listeners.

Parameters:

key - the key.

value - the value.

equals

public boolean equals(java.lang.Object obj)

Tests this dataset for equality with an arbitrary object.

Overrides:

equals in class java.lang.Object

Parameters:

obj - the object.

Returns:

A boolean.