How to populate bind variable in view objects where clause in ADF faces

Question

I've got a page with 2 input items.
The user manually enters the first value.
On the second input item I have created a LOV for the item which opens in a popup. How do I restrict the data returned in the LOV using the value entered in the first input item. I have created a bind variable and have included it in the where clause for the view object but how do I populated it.

Answer 1

Here is an example:
Using the HR schema with the EMPLOYEES and DEPARTMENTS tables.
Example is using ADF BC and created an EMPLOYEES entity with an updateable view object for page,
and created a DEPARTMENTS view as a lookup
(SQL: select department_id, department_name from departments where department_name = :DeptName)
1: add method to the backing bean to filter the LOV
public void getTextValueToFilterLOV(ValueChangeEvent valueChangeEvent) {
Object value_from_form = valueChangeEvent.getNewValue();
FacesContext fctx = FacesContext.getCurrentInstance();
Application fapp = fctx.getApplication();
JUFormBinding formBinding = (JUFormBinding)fapp.createValueBinding("#{bindings}").getValue(fctx);
DCIteratorBinding dcBinding = (DCIteratorBinding)formBinding.get("DeptLOVIterator");
ViewObject vo = dcBinding.getViewObject();
vo.setNamedWhereClauseParam("DeptName",value_from_form);
vo.executeQuery();
2. add valueChangeListener to the inputText on the page with an id and autoSubmit="true"
<af:inputText value="#{bindings.LastName.inputValue}" label="#{bindings.LastName.label}" binding="#{backing_DeptForm.inputText3}"
id="inputText3"
autoSubmit="true"
valueChangeListener="#{backing_DeptForm.getTextValueToFilterLOV}">
</af:inputText>
3. reference the LOV with the id name on the partialTriggers property
<af:selectOneChoice value="#{bindings.EmployeesUpdView1DepartmentId.inputValue}"
label="#{bindings.EmployeesUpdView1DepartmentId.label}" binding="#{backing_DeptForm.selectOneChoice1}"
id="selectOneChoice1"
partialTriggers="inputText3">
<f:selectItems value="#{bindings.EmployeesUpdView1DepartmentId.items}"
binding="#{backing_DeptForm.selectItems1}"
id="selectItems1"/>
</af:selectOneChoice>
Summary:
When you entered a text (LastName), that value is passed into the backing bean method.
The Bean method code will find the LOV Iterator and put the value into the bind variable.
Cheers,
Jim