Package com.vaadin.flow.component.combobox

Class ComboBoxDataCommunicator.SelectionPreservingKeyMapper<TItem>

java.lang.Object

com.vaadin.flow.data.provider.KeyMapper<TItem>

com.vaadin.flow.component.combobox.ComboBoxDataCommunicator.SelectionPreservingKeyMapper<TItem>

Type Parameters:

TItem - The type of the item selectable in the combo box

All Implemented Interfaces:

DataKeyMapper<TItem>, Serializable

Enclosing class:

ComboBoxDataCommunicator<TItem>

protected static class ComboBoxDataCommunicator.SelectionPreservingKeyMapper<TItem>
extends KeyMapper<TItem>

Customized key mapper that does not remove key for an item as long as it is selected.

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
SelectionPreservingKeyMapper(ComboBoxBase<?,TItem,?> comboBox)

Method Summary

Modifier and Type	Method	Description
String	key(TItem item)	Gets key for an object.
void	purgeItems()
void	remove(TItem item)	Removes object from the mapper.

Methods inherited from class com.vaadin.flow.data.provider.KeyMapper

containsKey, createKey, get, has, refresh, removeAll, setIdentifierGetter

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

SelectionPreservingKeyMapper

public SelectionPreservingKeyMapper(ComboBoxBase<?,TItem,?> comboBox)

Method Details

remove

public void remove(TItem item)

Description copied from class: KeyMapper

Removes object from the mapper.

Specified by:

remove in interface DataKeyMapper<TItem>

Overrides:

remove in class KeyMapper<TItem>

Parameters:

item - the object to be removed.

key

public String key(TItem item)

Description copied from class: KeyMapper

Gets key for an object.

Specified by:

key in interface DataKeyMapper<TItem>

Overrides:

key in class KeyMapper<TItem>

Parameters:

item - the object.

Returns:

key for given data object

purgeItems

public void purgeItems()