FacesListeners get added to components twice causing event to be raised twice.
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Key: MYFACES-1712
URL: https://issues.apache.org/jira/browse/MYFACES-1712
Project: MyFaces Core
Issue Type: Bug
Components: General
Affects Versions: 1.2.0
Environment: Windows XP, Tomcat 6.0, jdk6, MyFaces 1.2.0, Tomahawk
1.1.5
Reporter: Andrew Redman
On components that have an actionListener set or valueChangeListener, these
listeners are added to the component instance twice. At runtime this causes the
method to be called with the event twice. For example I have the following
component
<h:selectOneMenu id="Applications" onchange="submit()"
valueChangeListener="#{EditPage.processApplicationChange}">
my processApplicationChange method is invoke twice.
I have tracked this down the UIComponentELTag and UIComponentClassicTagBase
classes. The UIComponentClassicTagBase calls createComponent in the
findComponent method and then calls setProperties. However the createComponent
method that is implemented in UIComponentELTag also calls setProperties. The
setProperties routine is what adds any listeners to a collection. Therefore
they get added twice. By removing the setProperties in UIComponentELTag
createComponent and leaving it up to the findComponent method fixes the issue.
I'm not sure however if this will have other implications although as yet I
have found no issues.
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