How to call a query from the backing bean ?

Question

Hi all,
Another question for you guys :
I made a jspx page with an input form and a submit button.
When I click the submit button, the action my_action in my backing bean is executed.
This is the code :
public BindingContainer getBindings() {
return BindingContext.getCurrent().getCurrentBindingsEntry();
public String my_action() {
BindingContainer bindings = getBindings();
OperationBinding operationBinding = bindings.getOperationBinding("EmployeesView");
Object result = operationBinding.execute();
if (!operationBinding.getErrors().isEmpty()) {
return null;
I hoped that the query 'EmployeesView' was executed in this way, but I get the following exception :
java.lang.ClassCastException: oracle.adfinternal.view.faces.model.binding.FacesCtrlHierBinding cannot be cast to oracle.binding.OperationBinding
So how should I execute the query EmployeesView ?
Second part of the question : What if I typed the name an employee in my form, and I want to
execute a query that selects all the Employees with that name ?
How do I make a query with a variable as input in the WHERE clause ?
Thanks in advance.
Edited by: Facehugger on 7-apr-2010 11:15

Answer 1

I'm still trying all the stuff you guys says, but still no result.
This is my backing bean :
+// the button action+
+public String my_action()  {+ 
+// get the selected rows from the multiselect table and store the objectid's in an String array+
RowKeySet rks = graph_table.getSelectedRowKeys();
Iterator itr = rks.iterator();
Object key;
int nbr_objects = 0 , i = 0;
if (rks.size()>0)  nbr_objects = rks.size();
+String[] objectid = new String[nbr_objects];+
while(itr.hasNext())
+{+
key = itr.next();
graph_table.setRowKey(key);
Object o = graph_table.getRowData();
JUCtrlHierNodeBinding rowData = (JUCtrlHierNodeBinding) o;
Row row = rowData.getRow();
+objectid[i] = row.getAttribute("Objectid").toString();+
i+;+
+}+
+// now get all the x and y values for these objectid's from the database out of the table history.+
BindingContainer bc = BindingContext.getCurrent().getCurrentBindingsEntry();
for (int j=0 ; j<nbr_objects; j+){+
+// get X and Y values for object number j+
DataPoints history = new DataPoints();
OperationBinding operationBinding = bc.getOperationBinding("retrieveHistory");   ===> operationBinding stays NULL ???+
+operationBinding.getParamsMap().put("OBJECTID", objectid[j]);+
Object retVal = operationBinding.execute();
+// ==> retVal should contain a List of all X and Y values for the provided objectid.+
+// while (retVal has values)+
+// {+
+// List_of_x_values.add(retVal.valueX);+
+// List_of_y_values.add(retVal.valueY);+
+// }+
history.add(List_of_x_values);
history.add(List_of_y_values):
+// call the soap method to do some calculations+
methodname.forecast(history);
+}+
+}+
In my application module :
public void retrieveHistory(String objectid) {
getHistory().setWhereClause("OBJECTID = '" + objectid + "'");
System.out.println("current query : "+getHistory().getQuery());
getHistory().executeQuery();
public ViewObjectImpl getHistory() {+
return (ViewObjectImpl)findViewObject("History");+
The query for the VO History : SELECT * FROM HISTORY
Please anyone ?
Edited by: Facehugger on 9-apr-2010 14:19