viewData is undefined in event handler when event is triggered outside
showForm/sendPageAndWait
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Key: COCOON-1916
URL: http://issues.apache.org/jira/browse/COCOON-1916
Project: Cocoon
Issue Type: Bug
Components: Blocks: Forms
Affects Versions: 2.1.8, 2.1.9, 2.1.10-dev (current SVN)
Reporter: Rob Berens
Priority: Minor
When calling a java script snippet defined in the form description file,
viewData is passed in the context as long as viewData is available from the
objectModel and is not null. This makes it difficult to reliably use viewData
in the snippet. Consider the case where you create a form and then dynamically
assign some values to some widgets before actually showing the form. This
results in value-changed events to be fired with viewData undefined in the
context of the listener. Then using viewData in the snippet results in a
reference error. If the event is fired from a sendPageAndWait context, viewData
is neatly passed.
The problem is how to distinguish this in the event handler. It would be better
to always pass viewData be it a null value some times. Then a simple test
viewData == null could be used in the event handler. Note that viewData is also
null when sendPageAndWait is called with only one parameter.
This problem occurs on line 69 in
o.a.c.forms.event.impl.JavaScriptWidgetListener.java.
Is this a bug or is there some intentional use?
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