SelectionEvent (Vaadin Platform (vaadin-platform-javadoc) 23.3.2 API)

Type Parameters:

T - the data type of the selection model

C - the component type

All Superinterfaces:

Serializable

All Known Implementing Classes:

MultiSelectionEvent, SingleSelectionEvent
```
public interface SelectionEvent<C extends Component,T>
extends Serializable
```
A selection event that unifies the way to access to selection event for multi selection and single selection components (in case when only one selected item is required).

Since:

1.0

Author:

Vaadin Ltd

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`Set<T>`	`getAllSelectedItems()`	Gets all the currently selected items.
`Optional<T>`	`getFirstSelectedItem()`	Get first selected data item.
`C`	`getSource()`	The component on which the Event initially occurred.
`boolean`	`isFromClient()`	Checks if this event originated from the client side.

- Method Detail
  - getFirstSelectedItem
```
Optional<T> getFirstSelectedItem()
```
    Get first selected data item.
    This is the same as SingleSelectionEvent.getSelectedItem() in case of single selection.
    
    Returns:
    
    the first selected item.
  - getAllSelectedItems
```
Set<T> getAllSelectedItems()
```
    Gets all the currently selected items.
    This method applies more to multiselection - for single select it returns either an empty set or a set containing the only selected item.
    
    Returns:
    
    return all the selected items, if any, never null
  - getSource
```
C getSource()
```
    The component on which the Event initially occurred.
    
    Returns:
    
    The component on which the Event initially occurred.
  - isFromClient
```
boolean isFromClient()
```
    Checks if this event originated from the client side.
    
    Returns:
    
    true if the event originated from the client side, false otherwise