com.vaadin.flow.router

Class BeforeEvent

java.lang.Object

java.util.EventObject

com.vaadin.flow.router.BeforeEvent

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

BeforeEnterEvent, BeforeLeaveEvent

public abstract class BeforeEvent
extends EventObject

Abstract before event class that has the common functionalities for BeforeLeaveEvent and BeforeEnterEvent.

See Also:

Serialized Form

Field Summary

Fields inherited from class java.util.EventObject

source

Constructor Summary

Constructors

Constructor and Description
BeforeEvent(NavigationEvent event, Class<?> navigationTarget) Construct event from a NavigationEvent.
BeforeEvent(Router router, NavigationTrigger trigger, Location location, Class<?> navigationTarget, UI ui) Constructs a new BeforeNavigation Event.

Method Summary

Modifier and Type	Method and Description
ErrorParameter<?>	getErrorParameter() Get the set error parameter.
Location	getLocation() Gets the new location.
Class<?>	getNavigationTarget() Get the navigation target.
NavigationHandler	getRerouteTarget() Gets the reroute target to use if the user should be rerouted to some other view.
Class<?>	getRouteTargetType() Get the route target for rerouting.
Router	getSource()
NavigationTrigger	getTrigger() Gets the type of user action that triggered this location change.
UI	getUI() Gets the UI this navigation takes place inside.
boolean	hasErrorParameter() Check if we have an error parameter set for this navigation event.
boolean	hasRerouteTarget() Check if we have a reroute target.
void	rerouteTo(Class<? extends Component> routeTargetType) Reroutes the navigation to show the given component instead of the component that is currently about to be displayed.
void	rerouteTo(NavigationHandler rerouteTarget, NavigationState targetState) Reroutes the navigation to use the provided navigation handler instead of the currently used handler.
void	rerouteTo(NavigationState targetState) Reroutes the navigation to the given navigation state.
void	rerouteTo(String route) Reroute to navigation component registered for given location string instead of the component about to be displayed.
<T> void	rerouteTo(String route, List<T> routeParams) Reroute to navigation component registered for given location string with given route parameters instead of the component about to be displayed.
<T> void	rerouteTo(String route, T routeParam) Reroute to navigation component registered for given location string with given route parameter instead of the component about to be displayed.
void	rerouteToError(Class<? extends Exception> exception) Reroute to error target for given exception without custom message.
void	rerouteToError(Class<? extends Exception> exception, String customMessage) Reroute to error target for given exception with given custom message.
void	rerouteToError(Exception exception, String customMessage) Reroute to error target for given exception with given custom message.

Methods inherited from class java.util.EventObject

toString

Methods inherited from class java.lang.Object

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

Constructor Detail

BeforeEvent

public BeforeEvent(NavigationEvent event,
                   Class<?> navigationTarget)

Construct event from a NavigationEvent.

Parameters:

event - NavigationEvent that is on going

navigationTarget - Navigation target

BeforeEvent

public BeforeEvent(Router router,
                   NavigationTrigger trigger,
                   Location location,
                   Class<?> navigationTarget,
                   UI ui)

Constructs a new BeforeNavigation Event.

Parameters:

router - the router that triggered the change, not null

trigger - the type of user action that triggered this location change, not null

location - the new location, not null

navigationTarget - navigation target class

ui - the UI related to the navigation

Method Detail

getLocation

public Location getLocation()

Gets the new location.

Returns:

the new location, not null

getTrigger

public NavigationTrigger getTrigger()

Gets the type of user action that triggered this location change.

Returns:

the type of user action that triggered this location change, not null

getSource

public Router getSource()

Overrides:

getSource in class EventObject

hasRerouteTarget

public boolean hasRerouteTarget()

Check if we have a reroute target.

Returns:

reroute target exists

getRerouteTarget

public NavigationHandler getRerouteTarget()

Gets the reroute target to use if the user should be rerouted to some other view.

Returns:

an navigation handler

rerouteTo

public void rerouteTo(NavigationHandler rerouteTarget,
                      NavigationState targetState)

Reroutes the navigation to use the provided navigation handler instead of the currently used handler.

Parameters:

rerouteTarget - the navigation handler to use, or null to clear a previously set reroute target

targetState - the target navigation state of the rerouting

rerouteTo

public void rerouteTo(NavigationState targetState)

Reroutes the navigation to the given navigation state.

Parameters:

targetState - the target navigation state of the rerouting, not null

rerouteTo

public void rerouteTo(Class<? extends Component> routeTargetType)

Reroutes the navigation to show the given component instead of the component that is currently about to be displayed.

Parameters:

routeTargetType - the component type to display, not null

rerouteTo

public void rerouteTo(String route)

Reroute to navigation component registered for given location string instead of the component about to be displayed.

Parameters:

route - reroute target location string

rerouteTo

public <T> void rerouteTo(String route,
                          T routeParam)

Reroute to navigation component registered for given location string with given route parameter instead of the component about to be displayed.

Type Parameters:

T - route parameter type

Parameters:

route - reroute target location string

routeParam - route parameter

rerouteTo

public <T> void rerouteTo(String route,
                          List<T> routeParams)

Reroute to navigation component registered for given location string with given route parameters instead of the component about to be displayed.

Type Parameters:

T - route parameters type

Parameters:

route - reroute target location string

routeParams - route parameters

getRouteTargetType

public Class<?> getRouteTargetType()

Get the route target for rerouting.

Returns:

route target

getNavigationTarget

public Class<?> getNavigationTarget()

Get the navigation target.

Returns:

navigation target

rerouteToError

public void rerouteToError(Class<? extends Exception> exception)

Reroute to error target for given exception without custom message.

Exception class needs to have default no-arg constructor.

Parameters:

exception - exception to get error target for

See Also:

rerouteToError(Exception, String)

rerouteToError

public void rerouteToError(Class<? extends Exception> exception,
                           String customMessage)

Reroute to error target for given exception with given custom message.

Exception class needs to have default no-arg constructor.

Parameters:

exception - exception to get error target for

customMessage - custom message to send to error target

See Also:

rerouteToError(Exception, String)

rerouteToError

public void rerouteToError(Exception exception,
                           String customMessage)

Reroute to error target for given exception with given custom message.

Parameters:

exception - exception to get error target for

customMessage - custom message to send to error target

hasErrorParameter

public boolean hasErrorParameter()

Check if we have an error parameter set for this navigation event.

Returns:

true if error parameter is set

getErrorParameter

public ErrorParameter<?> getErrorParameter()

Get the set error parameter.

Returns:

error parameter

getUI

public UI getUI()

Gets the UI this navigation takes place inside.

Returns:

the related UI instance