Pre-populate selected values in viewObject based shuttle component (multiple selection)- Oracle ADF

Hello All,
This post talks about a common development requirement
while using shuttle component sometimes we need to show some values on selected side of af:selectManyShuttle , so to do this normally we use a custom shuttle component that is populated from managed bean code
but when i have all data in a viewObject so why should i iterate viewObject to get all data in managed bean and then set some values in an arrayList to populate selected shuttle values.
it is time consuming and requires lot of coding, so for viewObject based shuttle we can do it in efficient way.

• In this example I'm using Departments table of HR schema to populate af:selectManyShuttle, i think you all know how to create a shuttle in ADF
• So next is to populate selected shuttle values on some event, created a fusion web application using Departments table
  


• It's time to drop Departments ViewObject on page as shuttle component



<af:selectManyShuttle value="#{bindings.Departments1.inputValue}" label="#{bindings.Departments1.label}"
                                      id="sms1" size="15" binding="#{pageFlowScope.ShuttleSelectBean.shuttleBind}"
                                      partialTriggers="b1">
                    <f:selectItems value="#{bindings.Departments1.items}" id="si1"/>
                    <f:validator binding="#{bindings.Departments1.validator}"/>
                </af:selectManyShuttle>



• So suppose on a button click i want to set selected values in shuttle, so i have created a actionEvent for button in managed bean and binding of af:selectManyShuttle, so basic structure of page is like this







• See the code of actionEvent , create an arrayList and add all values in it that you want to set as selected values and then just set the value in shuttle using binding



    /**Method to set selected values in af:selectManyShuttle
     * @param actionEvent
     */
    public void selectValuesShuttle(ActionEvent actionEvent) {
        DCIteratorBinding iter = (DCIteratorBinding) getBindingsCont().get("Departments1Iterator");
        ViewObject vo = iter.getViewObject();
        RowSetIterator rsi = vo.createRowSetIterator(null);
        ArrayList listVal = new ArrayList(20);

        while (rsi.hasNext()) {
            Row nextRow = rsi.next();
            if (nextRow.getAttribute("DepartmentId") != null) {
                listVal.add(nextRow.getAttribute("DepartmentId"));
            }
        }
        shuttleBind.resetValue();// Reset Shuttle Component
        System.out.println("Setting values -" + listVal);
        shuttleBind.setValue(listVal.toArray()); // Setting selected values 
        AdfFacesContext.getCurrentInstance().addPartialTarget(shuttleBind);
    }



• Now run this page and test your shuttle component







Cheers- Happy Coding

• But this method works only when you have to set values on some action or other event after page load, because before page load , binding of shuttle component will not be accessible
• So if you have a requirement of setting selected values on page load then you must use a list defined in managed bean and bind it to  value property of shuttle component, value property denotes selected values of shuttle 





• And just write same code on getter of List, in this case selected values in shuttle are populated on page load



    List pageLoad = new ArrayList(20);
    public void setPageLoad(List pageLoad) {
        this.pageLoad = pageLoad;
    }

    public List getPageLoad() {
        DCIteratorBinding iter = (DCIteratorBinding) getBindingsCont().get("Departments1Iterator");
        ViewObject vo = iter.getViewObject();
        RowSetIterator rsi = vo.createRowSetIterator(null);
        while (rsi.hasNext()) {
            Row nextRow = rsi.next();
            if (nextRow.getAttribute("DepartmentId") != null) {
                pageLoad.add(nextRow.getAttribute("DepartmentId"));
            }
        }
        return pageLoad;
    }


Cheers- Use both method as per your requirement :-) Download Sample App