DatasetReference (Charba - J2CL and GWT charts library based on CHART.JS)

java.lang.Object
- org.pepstock.charba.client.commons.NativeObjectContainer
- - org.pepstock.charba.client.items.DatasetReference

```
public final class DatasetReference
extends NativeObjectContainer
```
Calling some methods on your chart instance passing an argument of an event, will return the elements at the event position.
The elements are mapped by this object.
This is the CHART.JS item with all needed info about a selected data set, providing the right indexes to get the data set.

Author:

Andrea "Stock" Stocchero

Constructor Summary

Constructors
Constructor	Description
`DatasetReference(AbstractDatasetContext context, ChartElement element)`	Creates the item reference using a a scriptale context and a data element
`DatasetReference(IsChart chart, ChartEnvelop<NativeObject> envelop)`	Creates the item using a chart instance and a native java script object which contains all properties.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`int`	`getDatasetIndex()`	Returns the data set item index.
`ChartElement`	`getElement()`	Returns the data set item element.
`int`	`getIndex()`	Returns the data set item data index.

Methods inherited from class org.pepstock.charba.client.commons.NativeObjectContainer
checkAndGetColor, checkDefaultValuesArgument, empty, getArrayValue, getElement, getIncrementalId, getNativeChart, getNativeEvent, getNativeObject, getValue, getValue, getValue, getValue, getValue, getValue, getValue, getValue, getValue, getValue, getValue, getValue, getValue, getValueForMultipleKeyTypes, getValueForMultipleKeyTypes, getValueForMultipleKeyTypes, getValueOrArray, getValueOrArray, getValueOrArray, getValueOrArray, getValueOrArray, getValueOrArray, getValueOrArray, getValueOrArray, getValueOrArray, has, has, isType, keys, loadNativeObject, remove, remove, setArrayValue, setArrayValue, setArrayValue, setElement, setEmptyValue, setNewIncrementalId, setNewIncrementalId, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValueOrArray, setValueOrArray, setValueOrArray, setValueOrArray, setValueOrArray, setValueOrArray, setValueOrArray, setValueOrArray, setValueOrArray, setValueOrArray, toJSON, type

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - DatasetReference
```
public DatasetReference(AbstractDatasetContext context,
                        ChartElement element)
```
    Creates the item reference using a a scriptale context and a data element
    
    Parameters:
    
    context - scriptable context instance
    
    element - chart element to add to the object
  - DatasetReference
```
public DatasetReference(IsChart chart,
                        ChartEnvelop<NativeObject> envelop)
```
    Creates the item using a chart instance and a native java script object which contains all properties.
    
    Parameters:
    
    chart - chart instance needed to create the dataset reference
    
    envelop - envelop from chart with native java script object which contains all properties
- Method Detail
  - getElement
```
public final ChartElement getElement()
```
    Returns the data set item element.
    
    Returns:
    
    the data set element
  - getDatasetIndex
```
public final int getDatasetIndex()
```
    Returns the data set item index.
    
    Returns:
    
    the data set item index.
  - getIndex
```
public final int getIndex()
```
    Returns the data set item data index.
    
    Returns:
    
    the data set item data index.