org.jfree.data
Class DefaultPieDataset

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

All Implemented Interfaces:

Dataset, KeyedValues, PieDataset, java.io.Serializable, Values

Direct Known Subclasses:

DefaultKeyedValuesDataset, JDBCPieDataset

public class DefaultPieDataset

extends AbstractDataset

implements PieDataset, java.io.Serializable

A default implementation of the PieDataset interface.

Author:

David Gilbert

See Also:

Serialized Form

Constructor Summary

DefaultPieDataset()
Constructs a new dataset, initially empty.

DefaultPieDataset(KeyedValues data)
Creates a new dataset that uses the data from a KeyedValues instance.

Method Summary

boolean	equals(java.lang.Object o) Tests if this object is equal to another.
int	getIndex(java.lang.Comparable key) Returns the index for a key.
int	getItemCount() Returns the number of items in the dataset.
java.lang.Comparable	getKey(int item) Returns the key for an item.
java.util.List	getKeys() Returns the categories in the dataset.
java.lang.Number	getValue(java.lang.Comparable key) Returns the data value associated with a key.
java.lang.Number	getValue(int item) Returns a value.
void	setValue(java.lang.Comparable key, double value) Sets the data value for a key.
void	setValue(java.lang.Comparable key, java.lang.Number value) Sets the data value for a key.

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

DefaultPieDataset

public DefaultPieDataset()

Constructs a new dataset, initially empty.

DefaultPieDataset

public DefaultPieDataset(KeyedValues data)

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

Parameters:

data - the data.

Method Detail

getItemCount

public int getItemCount()

Returns the number of items in the dataset.

Specified by:

getItemCount in interface Values

Returns:

the item count.

getKeys

public java.util.List getKeys()

Returns the categories in the dataset.

Specified by:

getKeys in interface KeyedValues

Returns:

the categories in the dataset.

getKey

public java.lang.Comparable getKey(int item)

Returns the key for an item.

Specified by:

getKey in interface KeyedValues

Parameters:

item - the item index (zero-based).

Returns:

the category.

getIndex

public int getIndex(java.lang.Comparable key)

Returns the index for a key.

Specified by:

getIndex in interface KeyedValues

Parameters:

key - the key.

Returns:

the key index.

getValue

public java.lang.Number getValue(int item)

Returns a value.

Specified by:

getValue in interface Values

Parameters:

item - the value index.

Returns:

the value (possibly null).

getValue

public java.lang.Number getValue(java.lang.Comparable key)

Returns the data value associated with a key.

Specified by:

getValue in interface KeyedValues

Parameters:

key - the key.

Returns:

The value (possibly null).

setValue

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

Sets the data value for a key.

Parameters:

key - the key.

value - the value.

setValue

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

Sets the data value for a key.

Parameters:

key - the key.

value - the value.

equals

public boolean equals(java.lang.Object o)

Tests if this object is equal to another.

Overrides:

equals in class java.lang.Object

Parameters:

o - the other object.

Returns:

A boolean.