ConverterHelper produce NullPointerException by calling Converter with
uiComponent = null parameter during restore view phase.
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Key: SHALE-406
URL: https://issues.apache.org/struts/browse/SHALE-406
Project: Shale
Issue Type: Bug
Components: View
Affects Versions: 1.0.4
Environment: Facelets 1.1.12, MyFaces 1.1.5-SNAPSHOT , Tomahawk
1.1.5-SNAPSHOT
Reporter: Ingo Dueppe
I had an backing bean class with the following property:
@Property{value="#{param.enrollmentId}")
private Long enrollmentId;
And this ends up that shale calls the
getAsObject method javax.faces.convert.LongConverter of MyFaces-1.1.5-SNAPSHOT
during the restore view phase .
This method expects an uiComponent not null otherwise it throws a
NullPointerException. But this method is called by the
org.apache.shale.util.ConverterHelper during create view and therefore
the facesContext setViewRoot is still null. So the below code of the
ConverterHelper
end ups in a NullPointerException in this situation.
public Object asObject(FacesContext context, Class type, String value) {
if (String.class == type) {
return value;
}
return converter(context,
type).getAsObject(context,context.getViewRoot(), value);
}
There are also some other parts in the ConverterHelper class that depends on
that viewRoot is not null.
Well the jsf - 1.1 spec says that the getAsObject method is called during the
apply request values phase.
As far as I understood it myfaces doesn't use the converter to initialize the
beans also. Instead it uses the Coercions class of common-el to convert
#{param.enrollmentId}.
Btw.: As workaround, define your own ConverterClass that can handle that the
component parameter is null.
- Ingo
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