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com.vaadin.flow.component.shared.
Package com.vaadin.flow.component.shared
Class SelectionPreservationHandler<T>
java.lang.Object
com.vaadin.flow.component.shared.SelectionPreservationHandler<T>
All Implemented Interfaces:
Abstract class that handles selection when DataProvider.refreshAll() is
called.
Uses SelectionPreservationMode to switch between the selection
preservation modes.
Author:
Vaadin Ltd.
See Also:
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Constructor Summary
ConstructorsConstructorDescriptionSelectionPreservationHandler(SelectionPreservationMode selectionPreservationMode) Constructor taking in the initial selection preservation mode.
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Method Summary
Modifier and TypeMethodDescriptionGets the selection preservation mode.
final voidhandleDataChange(DataChangeEvent<T> dataChangeEvent) Handles data change based on the current selection preservation mode.
abstract voidonDiscard(DataChangeEvent<T> dataChangeEvent) Clears selection when
DataProvider.refreshAll()is called.abstract voidonPreserveAll(DataChangeEvent<T> dataChangeEvent) Preserves all selected items when
DataProvider.refreshAll()is called.abstract voidonPreserveExisting(DataChangeEvent<T> dataChangeEvent) Preserves the selected items that still exist after
DataProvider.refreshAll()is called.final voidsetSelectionPreservationMode(SelectionPreservationMode selectionPreservationMode) Sets the selection preservation mode.
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Constructor Details
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Method Details
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getSelectionPreservationMode
Gets the selection preservation mode.
Returns:
the selection preservation mode
See Also:
-
handleDataChange
Handles data change based on the current selection preservation mode.
Parameters:
dataChangeEvent- the data change eventSee Also:
-
onPreserveAll
Preserves all selected items when
DataProvider.refreshAll()is called.Parameters:
dataChangeEvent- the data change event -
onPreserveExisting
Preserves the selected items that still exist after
DataProvider.refreshAll()is called.Parameters:
dataChangeEvent- the data change event -
onDiscard
Clears selection when
DataProvider.refreshAll()is called.Parameters:
dataChangeEvent- the data change event