How to execute lov View Accessor Query?

UseCase:
At each  Employee record, You want to display list of departments, this list of departments is changed according to a parameter changed at run-time.

You click a button and change the parameter value, the LOV must execute its query to fetch the correct data after changing the parameter.

So you have a ViewAccessor  it's query has a parameter ( :bvDeptId ) to filter data,
this parameter is changed during run-time when you click a button you change this parameter but the LOV shows old data, so how to make it's query to be executed:

Departments as list of value (LOV) at EmployeesView

DepartmentsView1 is the ViewAccessor attached to EmployeesView1 ViewObject .

ViewAccessor has a parameter ( bvDeptId ) to filter data,

Solution:
Note: When you create  LOV, you bound an attribute of a ViewObject with a ViewAccessor, This ViewAccessor is a new instance of the ViewObject ( Departments ), this instance is different than instances exists at application module container, this is new instance.

Ways to make the LOV execute it's query:

1- Get the view object which the LOV created on  (EmployeesView1) then retrieve the LOV view accessor  (DepartmentsView1)  then executes it's query:

ApplicationModuleImpl am = ADFUtils.getAppImpl("AppModule");

ViewObject vo =  am.findViewObject("EmployeesView1");

RowSet lov =(RowSet) vo.getCurrentRow().getAttribute("DepartmentsView1");
lov.executeQuery();

2-From the binding container get the LOV attribute and retrieves it's attached view object  then executes it's query:

BindingContainer bindings = getBindingContainer();

//FacesCtrlListBinding

FacesCtrlLOVBinding lov = (FacesCtrlLOVBinding) bindings.get("DepartmentId");

ViewObject departmentVO = lov.getListIterBinding().getViewObject();

departmentVO .executeQuery();

3- You can execute custom method at applicationModuleImpl as described here:

http://come2adf.blogspot.com/2013/05/create-department-while-creating.html