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https://issues.jboss.org/browse/RF-11125?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12620545#comment-12620545
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Jay Balunas commented on RF-11125:
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Can you determine if this behavior is specific to MyFaces? Could you try this
with mojarra?
> a4j:ajax listener method expression behaves differently for one or zero
> parameter methods
> -----------------------------------------------------------------------------------------
>
> Key: RF-11125
> URL: https://issues.jboss.org/browse/RF-11125
> Project: RichFaces
> Issue Type: Bug
> Security Level: Public(Everyone can see)
> Components: component-a4j-core
> Affects Versions: 4.0.0.Final
> Environment: MyFace 2.0.7, Tomcat 6, Richfaces 4.0
> Reporter: James G
> Labels: a4j:ajax
> Fix For: 4.1.0.Tracking
>
>
> When using a4j:ajax and setting the listener to a bean method, the call works
> correctly if the bean method has one parameter of type AjaxBehaviorEvent. If
> the method has no parameters then it may not be called correctly. This
> situation occurs if the method expression uses a variable scoped in facelets.
> For example using a ui:param under a ui:decorate. The method expression for
> one parameter is created using a call to
> ExpressionFactory.createMethodExpression( faceletContext, ... ) but the
> method expression for zero parameters is created using
> ExpressionFactory.createMethodExpression( elContext, ... ). The elContext
> does not contain the facelet variable mapping and so will not impart this to
> the method expression. This needs to be refactored to pass in the
> faceletContext when creating the zero parameter method expression.
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