ValueChangeEvent (Java EE 5 SDK)

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Java EE 5 SDK

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javax.faces.event Class ValueChangeEvent

java.lang.Object
  extended by java.util.EventObject
      extended by javax.faces.event.FacesEvent
          extended by javax.faces.event.ValueChangeEvent
所有已实现的接口:
Serializable
public class ValueChangeEvent
extends FacesEvent

A ValueChangeEvent is a notification that the local value of the source component has been change as a result of user interface activity. It is not fired unless validation of the new value was completed successfully.

另请参见:
Serialized Form

字段摘要
 
Fields inherited from class java.util.EventObject
source
 
构造器摘要
ValueChangeEvent(UIComponent component, Object oldValue, Object newValue)
          Construct a new event object from the specified source component, old value, and new value.
 
方法摘要
 Object getNewValue()
          Return the current local value of the source UIComponent.
 Object getOldValue()
          Return the previous local value of the source UIComponent.
 boolean isAppropriateListener(FacesListener listener)
          Return true if this FacesListener is an instance of a listener class that this event supports.
 void processListener(FacesListener listener)
          Broadcast this FacesEvent to the specified FacesListener, by whatever mechanism is appropriate.
 
类方法继承 javax.faces.event.FacesEvent
getComponent, getPhaseId, queue, setPhaseId
 
类方法继承 java.util.EventObject
getSource, toString
 
类方法继承 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

构造器详细信息

ValueChangeEvent

public ValueChangeEvent(UIComponent component,
                        Object oldValue,
                        Object newValue)

Construct a new event object from the specified source component, old value, and new value.

The default PhaseId for this event is PhaseId.ANY_PHASE.

参数:
component - Source UIComponent for this event
oldValue - The previous local value of this UIComponent
newValue - The new local value of thie UIComponent
抛出异常:
IllegalArgumentException - if component is null

方法详细信息

getOldValue

public Object getOldValue()

Return the previous local value of the source UIComponent.

getNewValue

public Object getNewValue()

Return the current local value of the source UIComponent.

isAppropriateListener

public boolean isAppropriateListener(FacesListener listener)
Description copied from class: FacesEvent

Return true if this FacesListener is an instance of a listener class that this event supports. Typically, this will be accomplished by an "instanceof" check on the listener class.

规范说明:
isAppropriateListener in class FacesEvent
参数:
listener - FacesListener to evaluate

processListener

public void processListener(FacesListener listener)
Description copied from class: FacesEvent

Broadcast this FacesEvent to the specified FacesListener, by whatever mechanism is appropriate. Typically, this will be accomplished by calling an event processing method, and passing this FacesEvent as a paramter.

规范说明:
processListener in class FacesEvent
参数:
listener - FacesListener to send this FacesEvent to
抛出异常:
AbortProcessingException - Signal the JavaServer Faces implementation that no further processing on the current event should be performed
概述  软件包   类  树  已过时  索引  帮助 
Java EE 5 SDK

深圳电信培训中心.徐海蛟老师.
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摘要: 嵌套 | 字段 | 构造器 | 方法 详细信息: 字段 | 构造器 | 方法
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