java.lang.Object
- javax.faces.event.MethodExpressionValueChangeListener

All Implemented Interfaces:

EventListener, StateHolder, FacesListener, ValueChangeListener
```
public class MethodExpressionValueChangeListener
extends Object
implements ValueChangeListener, StateHolder
```
MethodExpressionValueChangeListener is a ValueChangeListener that wraps a MethodExpression. When it receives a ValueChangeEvent, it executes a method on an object identified by the MethodExpression.

Constructor Summary

Constructors
Constructor and Description
`MethodExpressionValueChangeListener()`
`MethodExpressionValueChangeListener(MethodExpression methodExpressionOneArg)` Construct a `ValueChangeListener` that contains a `MethodExpression`.To accomodate method expression targets that take no arguments instead of taking a `ValueChangeEvent` argument, the implementation of this class must take the argument `methodExpressionOneArg`, extract its expression string, and create another `MethodExpression` whose expected param types match those of a zero argument method.
`MethodExpressionValueChangeListener(MethodExpression methodExpressionOneArg, MethodExpression methodExpressionZeroArg)` Construct a `ValueChangeListener` that contains a `MethodExpression`.

Retour à la première page de API Java Table des matières Haut

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`boolean`	`isTransient()` If true, the Object implementing this interface must not participate in state saving or restoring.
`void`	`processValueChange(ValueChangeEvent valueChangeEvent)` Call through to the `MethodExpression` passed in our constructor.
`void`	`restoreState(FacesContext context, Object state)` Both `MethodExpression` instances described in the constructor must be restored.
`Object`	`saveState(FacesContext context)` Both `MethodExpression` instances described in the constructor must be saved.
`void`	`setTransient(boolean newTransientValue)` Denotes whether or not the Object implementing this interface must or must not participate in state saving or restoring.

Retour à la première page de API Java Table des matières Haut

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - MethodExpressionValueChangeListener
```
public MethodExpressionValueChangeListener()
```
  - MethodExpressionValueChangeListener
```
public MethodExpressionValueChangeListener(MethodExpression methodExpressionOneArg)
```
    Construct a ValueChangeListener that contains a MethodExpression.To accomodate method expression targets that take no arguments instead of taking a ValueChangeEvent argument, the implementation of this class must take the argument methodExpressionOneArg, extract its expression string, and create another MethodExpression whose expected param types match those of a zero argument method. The usage requirements for both of these MethodExpression instances are described in processValueChange(javax.faces.event.ValueChangeEvent).
    
    Parameters:
    
    methodExpressionOneArg - a MethodExpression that points to a method that returns void and takes a single argument of type ValueChangeEvent.
  - MethodExpressionValueChangeListener
```
public MethodExpressionValueChangeListener(MethodExpression methodExpressionOneArg,
                                           MethodExpression methodExpressionZeroArg)
```
    Construct a ValueChangeListener that contains a MethodExpression.
- Method Detail
  - processValueChange
```
public void processValueChange(ValueChangeEvent valueChangeEvent)
                        throws AbortProcessingException
```
    Call through to the MethodExpression passed in our constructor. First, try to invoke the MethodExpression passed to the constructor of this instance, passing the argument ValueChangeEvent as the argument. If a MethodNotFoundException is thrown, call to the zero argument MethodExpression derived from the MethodExpression passed to the constructor of this instance. ~~If that fails for any reason, throw an AbortProcessingException, including the cause of the failure.~~
    
    Specified by:
    
    processValueChange in interface ValueChangeListener
    
    Parameters:
    
    valueChangeEvent - The ValueChangeEvent that has occurred
    
    Throws:
    
    NullPointerException - if the argument valueChangeEvent is null.
    
    AbortProcessingException - Signal the JavaServer Faces implementation that no further processing on the current event should be performed
  - saveState
```
public Object saveState(FacesContext context)
```
    Both MethodExpression instances described in the constructor must be saved.
    
    Specified by:
    
    saveState in interface StateHolder
  - restoreState
```
public void restoreState(FacesContext context,
                         Object state)
```
    Both MethodExpression instances described in the constructor must be restored.
    
    Specified by:
    
    restoreState in interface StateHolder
  - isTransient
```
public boolean isTransient()
```
    Description copied from interface: StateHolder
    
    If true, the Object implementing this interface must not participate in state saving or restoring.
    
    Specified by:
    
    isTransient in interface StateHolder
  - setTransient
```
public void setTransient(boolean newTransientValue)
```
    Description copied from interface: StateHolder
    
    Denotes whether or not the Object implementing this interface must or must not participate in state saving or restoring.
    
    Specified by:
    
    setTransient in interface StateHolder
    
    Parameters:
    
    newTransientValue - boolean pass true if this Object will not participate in state saving or restoring, otherwise pass false.

Traduction non disponible

Les API Java ne sont pas encore traduites en français sur l'infobrol. Seule la version anglaise est disponible pour l'instant.

Version en cache

21/08/2025 18:35:35 Cette version de la page est en cache (à la date du 21/08/2025 18:35:35) afin d'accélérer le traitement.
Vous pouvez activer le mode utilisateur dans le menu en haut pour afficher la version plus récente de la page.

Document créé le 14/04/2008, dernière modification le 18/08/2025
Source du document imprimé : https://www.gaudry.be/java-api-javaee-rf-javax/faces/event/MethodExpressionValueChangeListener.html

L'infobrol est un site personnel dont le contenu n'engage que moi. Le texte est mis à disposition sous licence CreativeCommons(BY-NC-SA). Plus d'info sur les conditions d'utilisation et sur l'auteur.

Références

Manuel PHP : https://docs.oracle.com, MethodExpressionValueChangeListener (Java(TM) EE 7 Specification APIs)

Ces références et liens indiquent des documents consultés lors de la rédaction de cette page, ou qui peuvent apporter un complément d'information, mais les auteurs de ces sources ne peuvent être tenus responsables du contenu de cette page.
L'auteur de ce site est seul responsable de la manière dont sont présentés ici les différents concepts, et des libertés qui sont prises avec les ouvrages de référence. N'oubliez pas que vous devez croiser les informations de sources multiples afin de diminuer les risques d'erreurs.

Class MethodExpressionValueChangeLis- tener

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

MethodExpressionValueChangeListener

MethodExpressionValueChangeListener

MethodExpressionValueChangeListener

Method Detail

processValueChange

saveState

restoreState

isTransient

setTransient

Références