Hi all,
I got an issue using the composite components feature of jsf2.0.
It's quite possible that I'm using the feature the wrong way.
I created such component to combine a label and an h:inputText. If I use
it with string objects all works fine but when I start to use instances
of custom classes and a converter registered in the faces-config.xml
must handle the object, it fails.
I use MyFaces 2.0.7 with a tomcat 6.0.32. I removed the label and other
stuff in my example:
My custom component (cc-ns: "http://java.sun.com/jsf/composite";)
...
<cc:interface>
<cc:attribute name="id" required="true" />
<cc:attribute name="value" required="true" />
</cc:interface>
<cc:implementation>
<h:inputText id="inputText" value="#{cc.attrs.value}" />
</cc:implementation>
...
I named the file 'myCC.xhtml' in /resources/myComponents/ so I can use
it with ns-declaration:
'xmlns:my="http://java.sun.com/jsf/composite/myComponents";' in my facelets.
I created also a bean named 'helloWorldBacking' with getMuh/setMuh and
it returns an Object of Type 'Muh'. A converter is registered in the
faces-config with 'converter-for-class' to handle the conversation
between view and model for the type.
If I use <h:inputText id="abc" value="#{helloWorldBacking.muh}" />
directly in my facelet it works like a charm. The converter is called
and get/set is called with the right object in the update model phase.
But if I switch to the myCC-component I get an exception:
Caused by: javax.el.ELException: /resources/myComponents/myCC.xhtml at line 17 and column
62 value="#{cc.attrs.value}":
/helloWorld.xhtml at line 17 and column 71 value="#{helloWorldBacking.muh}":
Cannot convert asdfasd of type class java.lang.String to class elproblem.Muh
at
org.apache.myfaces.view.facelets.el.TagValueExpression.setValue(TagValueExpression.java:129)
at
org.apache.myfaces.view.facelets.el.LocationValueExpression.setValue(LocationValueExpression.java:120)
at javax.faces.component.UIInput.updateModel(UIInput.java:379)
Maybe the behavior is slightly different with the used EL-library (I
tried jasper-el of the tomcat and EL2.2 of the glassfish) -- 'sometimes'
it works with none-null values the right way but if the bean returns
'null' if fails every time.
My investigations came to a stop at following point:
_SharedRendererUtils#findUIOutputConverter doesn't get the outer value
binding of the composite component and can't determine the type. So no
converter is called and he tried to update
the model with a String.
If I set the type to the cc:attribute it doesn't work. That would be a
bad solution anyway because the composite component must be abstract
(otherwise I could call the right converter by id :-) )
So my questions: Do I use the composite components feature the right
way? If not: What is my fault? What are your suggestions?
Thanks for your help,
Sven
