Package jakarta.faces.application

Class ConfigurableNavigationHandler

java.lang.Object

jakarta.faces.application.NavigationHandler

jakarta.faces.application.ConfigurableNavigationHandler

Direct Known Subclasses:

ConfigurableNavigationHandlerWrapper, NavigationHandlerImpl

public abstract class ConfigurableNavigationHandler
extends NavigationHandler

ConfigurableNavigationHandler extends the contract of NavigationHandler to allow runtime inspection of the NavigationCases that make up the rule-base for navigation. An implementation compliant with the version of the specification in which this class was introduced (or a later version) must make it so that its NavigationHandler is an extension of this class.

Since:

2.0

Constructor Summary

Constructors

Constructor	Description
ConfigurableNavigationHandler()

Method Summary

Modifier and Type	Method	Description
abstract NavigationCase	getNavigationCase(FacesContext context, String fromAction, String outcome)	Return the NavigationCase representing the navigation that would be taken had NavigationHandler.handleNavigation(jakarta.faces.context.FacesContext, java.lang.String, java.lang.String) been called with the same arguments or null if there is no such case.
NavigationCase	getNavigationCase(FacesContext context, String fromAction, String outcome, String toFlowDocumentId)	Return the NavigationCase representing the navigation that would be taken had NavigationHandler.handleNavigation(jakarta.faces.context.FacesContext, java.lang.String, java.lang.String) been called with the same arguments or null if there is no such case.
abstract Map<String,Set<NavigationCase>>	getNavigationCases()	Return a Map<String, Set<NavigationCase>> where the keys are <from-view-id> values and the values are Set<NavigationCase> where each element in the Set is a NavigationCase that applies to that <from-view-id>.
void	inspectFlow(FacesContext context, Flow flow)	Called by the flow system to cause the flow to be inspected for navigation rules.
void	performNavigation(String outcome)	A convenience method to signal the Jakarta Faces implementation to perform navigation with the provided outcome.

Methods inherited from class jakarta.faces.application.NavigationHandler

handleNavigation, handleNavigation

Methods inherited from class java.lang.Object

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

Constructor Details

ConfigurableNavigationHandler

public ConfigurableNavigationHandler()

Method Details

getNavigationCase

public abstract NavigationCase getNavigationCase(FacesContext context,
 String fromAction,
 String outcome)

Return the NavigationCase representing the navigation that would be taken had NavigationHandler.handleNavigation(jakarta.faces.context.FacesContext, java.lang.String, java.lang.String) been called with the same arguments or null if there is no such case.

Parameters:

context - The FacesContext for the current request

fromAction - The action binding expression that was evaluated to retrieve the specified outcome, or null if the outcome was acquired by some other means

outcome - The logical outcome returned by a previous invoked application action (which may be null)

Returns:

the navigation case, or null.

Throws:

NullPointerException - if context is null

Since:

2.0

getNavigationCase

public NavigationCase getNavigationCase(FacesContext context,
 String fromAction,
 String outcome,
 String toFlowDocumentId)

Return the NavigationCase representing the navigation that would be taken had NavigationHandler.handleNavigation(jakarta.faces.context.FacesContext, java.lang.String, java.lang.String) been called with the same arguments or null if there is no such case. Implementations that comply the version of the specification in which this method was introduced must override this method. For compatibility with decorated implementations that comply with an earlier version of the specification, an implementation is provided that simply calls through to getNavigationCase(jakarta.faces.context.FacesContext, java.lang.String, java.lang.String), ignoring the toFlowDocumentId parameter.

Parameters:

context - The FacesContext for the current request

fromAction - The action binding expression that was evaluated to retrieve the specified outcome, or null if the outcome was acquired by some other means

outcome - The logical outcome returned by a previous invoked application action (which may be null)

toFlowDocumentId - The value of the toFlowDocumentId property for the navigation case (which may be null)

Returns:

the navigation case, or null.

Throws:

NullPointerException - if context is null

Since:

2.2

getNavigationCases

public abstract Map<String,Set<NavigationCase>> getNavigationCases()

Return a Map<String, Set<NavigationCase>> where the keys are <from-view-id> values and the values are Set<NavigationCase> where each element in the Set is a NavigationCase that applies to that <from-view-id>. The implementation must support live modifications to this Map.

Returns:

a map with navigation cases.

Since:

2.0

performNavigation

public void performNavigation(String outcome)

A convenience method to signal the Jakarta Faces implementation to perform navigation with the provided outcome. When the NavigationHandler is invoked, the current viewId is treated as the "from viewId" and the "from action" is null.

Parameters:

outcome - the provided outcome.

Throws:

IllegalStateException - if this method is called after this instance has been released

inspectFlow

public void inspectFlow(FacesContext context,
 Flow flow)

Called by the flow system to cause the flow to be inspected for navigation rules. For backward compatibility with earlier implementations, an empty method is provided.

Parameters:

context - the Faces context.

flow - the flow.

Since:

2.2