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java.lang.Objectorg.jfree.data.general.AbstractDataset
org.jfree.data.category.CategoryToPieDataset
public class CategoryToPieDataset
A PieDataset implementation that obtains its data from one row or column of a
CategoryDataset.
| Constructor Summary | |
|---|---|
CategoryToPieDataset(CategoryDataset source,
org.jfree.util.TableOrder extract,
int index)
An adaptor class that converts any CategoryDataset into a PieDataset, by
taking the values from a single row or column. |
|
| Method Summary | |
|---|---|
void |
datasetChanged(DatasetChangeEvent event)
Passes the DatasetChangeEvent through. |
int |
getIndex(java.lang.Comparable key)
Returns the index for a given key. |
int |
getItemCount()
Returns the number of items (values) in the collection. |
java.lang.Comparable |
getKey(int index)
Returns a key. |
java.util.List |
getKeys()
Returns the keys. |
java.lang.Number |
getValue(java.lang.Comparable key)
Returns the value for a given key. |
java.lang.Number |
getValue(int item)
Returns a value. |
| Methods inherited from class org.jfree.data.general.AbstractDataset |
|---|
addChangeListener, clone, fireDatasetChanged, getGroup, notifyListeners, removeChangeListener, setGroup, validateObject |
| Methods inherited from class java.lang.Object |
|---|
equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Methods inherited from interface org.jfree.data.general.Dataset |
|---|
addChangeListener, getGroup, removeChangeListener, setGroup |
| Constructor Detail |
|---|
public CategoryToPieDataset(CategoryDataset source,
org.jfree.util.TableOrder extract,
int index)
CategoryDataset into a PieDataset, by
taking the values from a single row or column.
source - the source dataset (null permitted).extract - extract data from rows or columns? (null not permitted).index - the row or column index.| Method Detail |
|---|
public int getItemCount()
null, this method returns zero.
getItemCount in interface Valuespublic java.lang.Number getValue(int item)
getValue in interface Valuesitem - the item index (zero-based).
null).public java.lang.Comparable getKey(int index)
getKey in interface KeyedValuesindex - the item index (zero-based).
public int getIndex(java.lang.Comparable key)
getIndex in interface KeyedValueskey - the key.
public java.util.List getKeys()
getKeys in interface KeyedValuespublic java.lang.Number getValue(java.lang.Comparable key)
null (but note that null can be associated with a
valid key also).
getValue in interface KeyedValueskey - the key.
null).public void datasetChanged(DatasetChangeEvent event)
DatasetChangeEvent through.
datasetChanged in interface DatasetChangeListenerevent - the event.
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