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java.lang.Objectjavax.faces.event.MethodExpressionValueChangeListener
public class MethodExpressionValueChangeListener
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 | |
|---|---|
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. |
|
| Method Summary | |
|---|---|
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,
java.lang.Object state)
Both |
java.lang.Object |
saveState(FacesContext context)
Both |
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 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).
methodExpressionOneArg - a MethodExpression
that points to a method that returns void and takes
a single argument of type ValueChangeEvent.
public MethodExpressionValueChangeListener(MethodExpression methodExpressionOneArg,
MethodExpression methodExpressionZeroArg)
Construct a ValueChangeListener that contains a MethodExpression.
| Method Detail |
|---|
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.
processValueChange in interface ValueChangeListenervalueChangeEvent - The ValueChangeEvent that has occurred
java.lang.NullPointerException
AbortProcessingException - Signal the JavaServer Faces
implementation that no further processing on the current event
should be performedpublic java.lang.Object saveState(FacesContext context)
Both MethodExpression
instances described in the constructor must be saved.
saveState in interface StateHolder
public void restoreState(FacesContext context,
java.lang.Object state)
Both MethodExpression
instances described in the constructor must be restored.
restoreState in interface StateHolderpublic boolean isTransient()
StateHolderIf true, the Object implementing this interface must not participate in state saving or restoring.
isTransient in interface StateHolderpublic void setTransient(boolean newTransientValue)
StateHolderDenotes whether or not the Object implementing this interface must or must not participate in state saving or restoring.
setTransient in interface StateHoldernewTransientValue - boolean pass true if this Object
will participate in state saving or restoring, otherwise
pass false.
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Copyright © 2009 Sun Microsystems, Inc. All Rights Reserved. Use is subject to license terms.
Generated on 24-November-2009 03:24