Why findCtrlBinding fails in action method?

Question

And here we are...
In JDeveloper 10.1.3 EA I have a JSF JSP page with backing bean.
Drag and drop a View Object (called "VoPolizasAsociadasEntidadExterna1") from Data Contol Palette as ADF Table Read-Only. The table is called "tablePolizas".
Drag and Drop an ADF CommandButton from Component Palette. The button is called "cmdBtnCrear".
In the backing bean I have a private method to execute my ViewObject, (as you will see, ViewObject has a bind variable):
private void ejecutarConsultaPolizas(){
DCBindingContainer dcbc;
DCControlBinding cb;
String rutEntidad;
ViewObject vo;
FacesContext ctx =FacesContext.getCurrentInstance();
ValueBinding vb = ctx.getApplication().createValueBinding("#{SessionManager.rutEntidad}");
rutEntidad = vb.getValue(ctx).toString();
dcbc = this.getBindingContainer();
cb = dcbc.findCtrlBinding("VoPolizasAsociadasEntidadExterna1");
vo = cb.getViewObject();
vo.setNamedWhereClauseParam("RUT_ENTIDAD", rutEntidad);
vo.executeQuery();
Then I call this method within the "getter" method of the tablePolizas table. Works fine:
public CoreTable getTablePolizas() {
ejecutarConsultaPolizas();
return tablePolizas;
The ADF Table show filtered data as expected !!!!
But when ejecutarConsultaPolizas() method is called from action method of CommandButton "cmdBtnCrear":
public String cmdBtnCrear_action() {
ejecutarConsultaPolizas();
return null;
The following exception is thrown:
javax.faces.FacesException: #{backing_CrearUsuario.cmdBtnCrear_action}: javax.faces.el.EvaluationException: java.lang.NullPointerException
In debug mode run step by step and encounter that exception is thrown in the following line of ejecutarConsultaPolizas():
cb = dcbc.findCtrlBinding("VoPolizasAsociadasEntidadExterna1");
The ejecutarConsultaPolizas() method fails when is called from an action method. Why?
There is something in the JSF Life-Cycle that I must consider?
JSF/ADF got me going crazy!!!!!
Thanks for your help!

Answer 1

You need to add the reference to the ADF binding using managed properties on the bean
In the backing bean create
private BindingContainer bindings;
public BindingContainer getBindings() {
return this.bindings;
public void setBindings(BindingContainer bindings) {
this.bindings = bindings;
In the faces-config.xml file ad the following to your backing bean configuration
<managed-bean>
<managed-bean-name>your bean name</managed-bean-name>
<managed-bean-class>your.bean.class</managed-bean-class>
<managed-bean-scope>request or session or application</managed-bean-scope>
<managed-property>
<property-name>bindings</property-name>
<value>#{bindings}</value>
</managed-property>
</managed-bean>
<managed-bean>
In your backing bean code you can now use
getBindings() to access the business service. Note that you need to call the getDataProvider and the cast it to the BC AM
Frank