com.vaadin.flow.data.selection.
Class SingleSelectionEvent<C extends Component,T>
- java.lang.Object
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- java.util.EventObject
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- com.vaadin.flow.component.ComponentEvent<C>
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- com.vaadin.flow.component.AbstractField.ComponentValueChangeEvent<C,T>
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- com.vaadin.flow.data.selection.SingleSelectionEvent<C,T>
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Type Parameters:
C
- the selection component typeT
- the type of the selected itemAll Implemented Interfaces:
HasValue.ValueChangeEvent<T>, SelectionEvent<C,T>, Serializable
public class SingleSelectionEvent<C extends Component,T> extends AbstractField.ComponentValueChangeEvent<C,T> implements SelectionEvent<C,T>
Fired when the selection changes in a listing component.
Since:
1.0.
Author:
Vaadin Ltd
See Also:
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Field Summary
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Fields inherited from class java.util.EventObject
source
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Constructor Summary
Constructors Constructor and Description SingleSelectionEvent(C listing, SingleSelect<C,T> source, T oldSelection, boolean userOriginated)
Creates a new selection change event in a component.
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Method Summary
All Methods Modifier and Type Method and Description Set<T>
getAllSelectedItems()
Gets all the currently selected items.
Optional<T>
getFirstSelectedItem()
Get first selected data item.
Optional<T>
getSelectedItem()
Returns an optional of the item that was selected, or an empty optional if a previously selected item was deselected.
C
getSource()
The listing component on which the Event initially occurred.
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Methods inherited from class com.vaadin.flow.component.AbstractField.ComponentValueChangeEvent
getHasValue, getOldValue, getValue, toString
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Methods inherited from class com.vaadin.flow.component.ComponentEvent
isFromClient, unregisterListener
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Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
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Methods inherited from interface com.vaadin.flow.data.selection.SelectionEvent
isFromClient
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Methods inherited from interface com.vaadin.flow.component.HasValue.ValueChangeEvent
isFromClient
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Constructor Detail
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SingleSelectionEvent
public SingleSelectionEvent(C listing, SingleSelect<C,T> source, T oldSelection, boolean userOriginated)
Creates a new selection change event in a component.
Parameters:
listing
- the listing component where the event originatedsource
- the single select sourceoldSelection
- the item that was previously selecteduserOriginated
-true
if this event originates from the client,false
otherwise.
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Method Detail
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getSelectedItem
public Optional<T> getSelectedItem()
Returns an optional of the item that was selected, or an empty optional if a previously selected item was deselected.
Returns:
the selected item or an empty optional if deselected
See Also:
AbstractField.ComponentValueChangeEvent.getValue()
,SelectionModel.Single.getSelectedItem()
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getSource
public C getSource()
The listing component on which the Event initially occurred.
Specified by:
getSource
in interfaceSelectionEvent<C extends Component,T>
Overrides:
getSource
in classComponentEvent<C extends Component>
Returns:
The listing component on which the Event initially occurred.
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getFirstSelectedItem
public Optional<T> getFirstSelectedItem()
Description copied from interface:
SelectionEvent
Get first selected data item.
This is the same as
getSelectedItem()
in case of single selection.Specified by:
getFirstSelectedItem
in interfaceSelectionEvent<C extends Component,T>
Returns:
the first selected item.
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getAllSelectedItems
public Set<T> getAllSelectedItems()
Description copied from interface:
SelectionEvent
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.
Specified by:
getAllSelectedItems
in interfaceSelectionEvent<C extends Component,T>
Returns:
return all the selected items, if any, never
null
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