Package com.vaadin.flow.internal.nodefeature

Class ElementListenerMap

java.lang.Object

com.vaadin.flow.internal.nodefeature.NodeFeature

com.vaadin.flow.internal.nodefeature.NodeMap

com.vaadin.flow.internal.nodefeature.ElementListenerMap

All Implemented Interfaces:

Serializable

public class ElementListenerMap
extends NodeMap

Map of DOM events with server-side listeners. The key set of this map describes the event types for which listeners are present. The values associated with the keys are currently not used.

For internal use only. May be renamed or removed in a future release.

Since:

1.0

Author:

Vaadin Ltd

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static final String	ALWAYS_TRUE_FILTER	Dummy filter string that always passes.

Constructor Summary

Constructors

Constructor	Description
ElementListenerMap(StateNode node)	Creates a new element listener map for the given node.

Method Summary

Modifier and Type	Method	Description
DomListenerRegistration	add(String eventType, DomEventListener listener)	Add eventData for an event type.
void	fireEvent(DomEvent event)	Fires an event to all listeners registered for the given type.
Set<String>	getExpressions(String eventName)	Gets the event data expressions defined for the given event name.
DisabledUpdateMode	getPropertySynchronizationMode(String propertyName)	Gets the most permissive update mode for any event registration that is configured to synchronize the given property.

Methods inherited from class com.vaadin.flow.internal.nodefeature.NodeMap

clear, collectChanges, contains, forEachChild, generateChangesFromEmpty, get, getOrDefault, getOrDefault, getOrDefault, keySet, mayUpdateFromClient, producePutChange, put, put, remove, updateFromClient

Methods inherited from class com.vaadin.flow.internal.nodefeature.NodeFeature

allowsChanges, attachPotentialChild, detatchPotentialChild, getNode, onAttach, onDetach

Methods inherited from class java.lang.Object

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

Field Details

ALWAYS_TRUE_FILTER

public static final String ALWAYS_TRUE_FILTER

Dummy filter string that always passes.

See Also:

• Constant Field Values

Constructor Details

ElementListenerMap

public ElementListenerMap(StateNode node)

Creates a new element listener map for the given node.

Parameters:

node - the node that the map belongs to

Method Details

add

public DomListenerRegistration add(String eventType,
 DomEventListener listener)

Add eventData for an event type.

Parameters:

eventType - the event type

listener - the listener to add

Returns:

a handle for configuring and removing the listener

fireEvent

public void fireEvent(DomEvent event)

Fires an event to all listeners registered for the given type.

Parameters:

event - the event to fire

getExpressions

public Set<String> getExpressions(String eventName)

Gets the event data expressions defined for the given event name. This method is currently only provided to facilitate unit testing.

Parameters:

eventName - the name of the event, not null

Returns:

an unmodifiable set of event data expressions, not null

getPropertySynchronizationMode

public DisabledUpdateMode getPropertySynchronizationMode(String propertyName)

Gets the most permissive update mode for any event registration that is configured to synchronize the given property.

Parameters:

propertyName - the property name to check, not null

Returns:

the most permissive update mode, or null if synchronization is not configured for the given property