com.vaadin.flow.internal.nodefeature

Class ComponentMapping

java.lang.Object

com.vaadin.flow.internal.nodefeature.NodeFeature

com.vaadin.flow.internal.nodefeature.ServerSideFeature

com.vaadin.flow.internal.nodefeature.ComponentMapping

All Implemented Interfaces:

Serializable

public class ComponentMapping
extends ServerSideFeature

A server side only node feature for mapping a node to a component.

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

Since:

1.0

Author:

Vaadin Ltd

See Also:

Serialized Form

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	ComponentMapping(StateNode node) Creates an instance of this node feature.

Method Summary

Modifier and Type	Method and Description
Optional<Component>	getComponent() Gets the component this node has been mapped to, if any.
static Optional<Component>	getComponent(StateNode node) Gets the component mapped to the given state node.
void	onAttach(boolean initialAttach) Called when the state node has been attached to the state tree.
void	onDetach() Called when the state node has been detached from the state tree.
void	setComponent(Component component) Assigns the given component to this node.

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

collectChanges, forEachChild, generateChangesFromEmpty

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

allowsChanges, attachPotentialChild, detatchPotentialChild, getNode

Methods inherited from class java.lang.Object

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

Constructor Detail

ComponentMapping

protected ComponentMapping(StateNode node)

Creates an instance of this node feature.

Parameters:

node - the node that the feature belongs to

Method Detail

setComponent

public void setComponent(Component component)

Assigns the given component to this node.

When assigning a component to the node, there must be no previously assigned component.

Parameters:

component - the component to assign to this node, not null

getComponent

public Optional<Component> getComponent()

Gets the component this node has been mapped to, if any.

Returns:

an optional component, or an empty optional if no component has been mapped to this node

getComponent

public static Optional<Component> getComponent(StateNode node)

Gets the component mapped to the given state node.

Parameters:

node - the state node for which to find a component, not null

Returns:

the mapped component, or an empty optional if no component is mapped

onAttach

public void onAttach(boolean initialAttach)

Description copied from class: NodeFeature

Called when the state node has been attached to the state tree.

Overrides:

onAttach in class NodeFeature

Parameters:

initialAttach - true if this is the first time the node is attached to a StateTree, false otherwise

onDetach

public void onDetach()

Description copied from class: NodeFeature

Called when the state node has been detached from the state tree.

Overrides:

onDetach in class NodeFeature