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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>,Serializablepublic 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 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 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.
CgetSource()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.component.HasValue.ValueChangeEvent
isFromClient
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Methods inherited from interface com.vaadin.flow.data.selection.SelectionEvent
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-trueif this event originates from the client,falseotherwise.
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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:
getSourcein interfaceSelectionEvent<C extends Component,T>Overrides:
getSourcein 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:
SelectionEventGet first selected data item.
This is the same as
getSelectedItem()in case of single selection.Specified by:
getFirstSelectedItemin interfaceSelectionEvent<C extends Component,T>Returns:
the first selected item.
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getAllSelectedItems
public Set<T> getAllSelectedItems()Description copied from interface:
SelectionEventGets 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:
getAllSelectedItemsin interfaceSelectionEvent<C extends Component,T>Returns:
return all the selected items, if any, never
null
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