Dynamic Declarative Component managed bean returned null

Question

Hi,
In a project from an application a DDC component is defined. This component uses a managed/backing bean with view scope.
Using this component inside this project is working fine. This component should be used in other view controller projects, and here where the problems are.
This project(let's call it Common) is deployed as ADF Library jar, and used in the other V-C projects.
The big problem is that the managed bean defined for the logic of this component is not 'reacheable'.
(Another problem is that the attribute value is not seen as its EL expression but as string, for this i found a workaround.)
In project Common the adfc-config.xml file:
<adfc-config xmlns="http://xmlns.oracle.com/adf/controller" version="1.2">
  <managed-bean id="__4">
    <managed-bean-name id="__2">ExtendedShuttle</managed-bean-name>
    <managed-bean-class id="__1">com.xyz.portal.taskflow.common.extendedshuttle.ExtendedShuttle</managed-bean-class>
    <managed-bean-scope id="__3">view</managed-bean-scope>
  </managed-bean>
</adfc-config>A part from component declaration:
      <af:table var="row" rowBandingInterval="0" id="ta"
                              rowSelection="multiple" columnStretching="last"
                              disableColumnReordering="true" fetchSize="-1"
                              binding="#{viewScope.ExtendedShuttle.allItemsTable}"
                              value="#{viewScope.ExtendedShuttle.allModel}"
                              partialTriggers="::dc_cb5 ::dc_cb3"
                              filterVisible="true"/>The root exception is :
javax.el.PropertyNotFoundException: Target Unreachable, 'ExtendedShuttle' returned null
This exception is throw on com.sun.faces.application.ApplicationImpl.createComponent when *#{viewScope.ExtendedShuttle.allItemsTable}* is evaluated.
Caused By: javax.faces.FacesException: javax.el.PropertyNotFoundException: Target Unreachable, 'ExtendedShuttle' returned null
     at com.sun.faces.application.ApplicationImpl.createComponent(ApplicationImpl.java:262)
     at javax.faces.webapp.UIComponentELTag.createComponent(UIComponentELTag.java:222)
     at javax.faces.webapp.UIComponentClassicTagBase.createFacet(UIComponentClassicTagBase.java:510)
     at javax.faces.webapp.UIComponentClassicTagBase.findComponent(UIComponentClassicTagBase.java:661)
     at javax.faces.webapp.UIComponentClassicTagBase.doStartTag(UIComponentClassicTagBase.java:1142)
     at org.apache.myfaces.trinidad.webapp.UIXComponentELTag.doStartTag(UIXComponentELTag.java:70)
     at oracle.adfinternal.view.faces.taglib.UIXTableTag.doStartTag(UIXTableTag.java:41)
     at oracle.adfinternal.view.faces.unified.taglib.data.UnifiedTableTag.doStartTag(UnifiedTableTag.java:50)
     at oracle.jsp.runtime.tree.OracleJspBodyTagNode.executeHandler(OracleJspBodyTagNode.java:50)
Caused By: javax.faces.FacesException: javax.el.PropertyNotFoundException: Target Unreachable, 'ExtendedShuttle' returned null
     at com.sun.faces.application.ApplicationImpl.createComponent(ApplicationImpl.java:262)
     at javax.faces.webapp.UIComponentELTag.createComponent(UIComponentELTag.java:222)
     at javax.faces.webapp.UIComponentClassicTagBase.createFacet(UIComponentClassicTagBase.java:510)
     at javax.faces.webapp.UIComponentClassicTagBase.findComponent(UIComponentClassicTagBase.java:661)
     at javax.faces.webapp.UIComponentClassicTagBase.doStartTag(UIComponentClassicTagBase.java:1142)
     at org.apache.myfaces.trinidad.webapp.UIXComponentELTag.doStartTag(UIXComponentELTag.java:70)
     at oracle.adfinternal.view.faces.taglib.UIXTableTag.doStartTag(UIXTableTag.java:41)
     at oracle.adfinternal.view.faces.unified.taglib.data.UnifiedTableTag.doStartTag(UnifiedTableTag.java:50)
     at oracle.jsp.runtime.tree.OracleJspBodyTagNode.executeHandler(OracleJspBodyTagNode.java:50)
Caused by: javax.el.PropertyNotFoundException: Target Unreachable, 'ExtendedShuttle' returned null
     at com.sun.el.parser.AstValue.getTarget(AstValue.java:88)
     at com.sun.el.parser.AstValue.setValue(AstValue.java:133)
     at com.sun.el.ValueExpressionImpl.setValue(ValueExpressionImpl.java:255)
     at com.sun.faces.application.ApplicationImpl.createComponent(ApplicationImpl.java:259)
Can you help figure it out, why is not working or why the managed bean is not visible in other projects but only in the one where the component is defined?
Thank you for your time,
Bogdan
ps: how can i format the source code, on this fourm?

Answer 1

Hi Frank,
Thank you for the answer.
I must say i'm quite new with ADF technology and maybe my questions are silly.
Here is a Quote from "Oracle Fusion Developer Guide - Building Rich Internet Application with Oracle ADF" by Frank Nimphius and Lynn Munsinger Chapter 15 page 498:
"You build dynamic declarative components *instead* of tag library based declarative components, if component resuse is required *only within the application* that has the component defined."
Maybe i misunderstand the meaning of application from this sentence, but i need this component in several ViewController projects from only one application (ADF application).
Tag lib declarative component I would not like to have, since the (automtically) build process is not my responsability and it will take some time till is pinpointed, but still is a last resort.
Anyway two things are strange:
1. Why the component is still available in other projects(and the beans not)?
2. Why when a binding variable (for example: of type FaceCtrlHierBinding) has the correct type in the declarative project and in the order projects is of type String and its value is the variable name?
Example:
<af:declarativeComponent ...
AllItems="#{bindings.Action}"
In project where the component is declared its value is an instance of FacesCtrlHierBinding and in the rest of the projects is of type String with value "Action".
Once again thank you a lot,
Bogdan