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javax.faces.event Class MethodExpressionActionListener
java.lang.Object javax.faces.event.MethodExpressionActionListener
- All Implemented Interfaces:
- EventListener, StateHolder, ActionListener, FacesListener
public class MethodExpressionActionListener
- extends Object
- implements ActionListener, StateHolder
MethodExpressionActionListener 是包装 MethodExpression
的 ActionListener
。当收到一个 ActionEvent
时,它对 MethodExpression
标识的对象执行一个方法。
MethodExpressionActionListener is an ActionListener
that
wraps a MethodExpression
. When it receives a ActionEvent
, it executes
a method on an object identified by the MethodExpression
.
Constructor Summary | |
---|---|
MethodExpressionActionListener()
|
|
MethodExpressionActionListener(MethodExpression methodExpression)
Construct a ValueChangeListener that contains a MethodExpression . |
Method Summary | |
---|---|
boolean |
isTransient()
If true, the Object implementing this interface must not participate in state saving or restoring. |
void |
processAction(ActionEvent actionEvent)
Invoked when the action described by the specified ActionEvent occurs. |
void |
restoreState(FacesContext context,
Object state)
Perform any processing required to restore the state from the entries in the state Object. |
Object |
saveState(FacesContext context)
Gets the state of the instance as a Serializable Object. |
void |
setTransient(boolean newTransientValue)
Denotes whether or not the Object implementing this interface must or must not participate in state saving or restoring. |
Methods inherited from class java.lang.Object |
---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
---|
public
MethodExpressionActionListener()
英文文档:
MethodExpressionActionListener
public MethodExpressionActionListener()
public
MethodExpressionActionListener(MethodExpression methodExpression)
构造包含 MethodExpression
的 ValueChangeListener
。
MethodExpressionActionListener
public MethodExpressionActionListener(MethodExpression methodExpression)
Construct a
ValueChangeListener
that contains aMethodExpression
.
Method Detail |
---|
public void
processAction(ActionEvent actionEvent) throws AbortProcessingException
Throws | NullPointerException: NullPointerException |
Throws | AbortProcessingException: NullPointerException 通知 JavaServer Face 实现不应该继续处理当前事件 |
processAction
public void processAction(ActionEvent actionEvent) throws AbortProcessingException
- Description copied from interface:
ActionListener
Invoked when the action described by the specified
ActionEvent
occurs.- Specified by:
processAction
in interfaceActionListener
- Parameters:
actionEvent
- TheActionEvent
that has occurred- Throws:
NullPointerException
AbortProcessingException
- Signal the JavaServer Faces implementation that no further processing on the current event should be performed
public Object
saveState(FacesContext context)
英文文档:
saveState
public Object saveState(FacesContext context)
- Description copied from interface:
StateHolder
Gets the state of the instance as a
Serializable
Object.If the class that implements this interface has references to instances that implement StateHolder (such as a
UIComponent
with event handlers, validators, etc.) this method must call theStateHolder.saveState(javax.faces.context.FacesContext)
method on all those instances as well. This method must not save the state of children and facets. That is done via theStateManager
This method must not alter the state of the implementing object. In other words, after executing this code:
Object state = component.saveState(facesContext);
component
should be the same as before executing it.The return from this method must be
Serializable
- Specified by:
saveState
in interfaceStateHolder
public void
restoreState(FacesContext context, Object state)
英文文档:
restoreState
public void restoreState(FacesContext context, Object state)
- Description copied from interface:
StateHolder
Perform any processing required to restore the state from the entries in the state Object.
If the class that implements this interface has references to instances that also implement StateHolder (such as a
UIComponent
with event handlers, validators, etc.) this method must call theStateHolder.restoreState(javax.faces.context.FacesContext, java.lang.Object)
method on all those instances as well.- Specified by:
restoreState
in interfaceStateHolder
public boolean
isTransient()
英文文档:
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 interfaceStateHolder
public void
setTransient(boolean newTransientValue)
英文文档:
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 interfaceStateHolder
- Parameters:
newTransientValue
- boolean passtrue
if this Object will participate in state saving or restoring, otherwise passfalse
.
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Copyright 2007 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms.
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