ViewObject Validation rules for transient attributes (Model level validation in ADF)

Hello All,
this post is about model level validation for transient attributes, often we need to apply some common types of validation on transient attributes (as for negative value, for email, for phone number)
in ADF ViewObject there is a editor for validation rules for transient attributes, so now see how to use that editor and rules

• Create a fusion web application and prepare model layer using Departments table of HR schema





• Then create a transient attribute in viewObject and you can see that Validation Rules tab appears only in case of transient attribute








• Now click on add icon to add new validation rule for attribute, you can see there are multiple types for that validation rule 








• In this post i have used Compare and Regular Expression rules, suppose i have to check that value of transient attribute must not be 100 , so for that rule will be like this, and write a proper message for failure handling 








• Now run your BC4J tester and check , a window with error message appears there in case of failure





• You can also check this validation on your page, some more- i have added one more transient field for Email Address and applied a regular expression to validate this field (ADF by default provides regular expression for Email and Phone Number pattern for others you can use your own pattern)





• After model level configurations , i have dropped Departments ViewObject on page as ADF form, here you can see both validation are working 

Cheers :-) Happy Learning

Pagination in ADF table with Jdeveloper 12.1.2 (ADF 12C) - returned back

Hello All,
Pagination in ADF table was very requested feature after Jdev & ADF 10g.
now in 12C again it is here and quite simple

• Created a fusion web application using Departments table of HR Schema and dropped it on page as ADF table
  
  
  


• Now suppose i want to show pagination after 5 rows so to achieve this follow these steps
• Select table in structure window and go to property inspector change it's scrollPolicy to page ,scrollPolicy is mechanism to scroll data inside table







• Now select table on page and go to binding tab and select IteratorBinding of Departments table and change rangeSize to 5, by default it is 25 (means fetched 25 rows at a time)

• Set autoheightRows to 0 and styleClass to AFStretchWidth and you are done now run your page





• It works good in mozilla ,chrome and IE, but sometimes you can face a problem of finding current row as it may be in second page :-(

Get updated model values in value change listener instantly, ProcessUpdates in ADF (a beauty)

Hello All,

This posts talks about updating model instantly when a attribute is changed on page level.
In ValueChangeListener of component if we try to get new value from Model layer, it always returns old value, then we have only one option to get new value, use event object (evt.getNewValue();)
but sometimes we need to update model same time
So how to do this-

• Created a Fusion Web Application using Departments table of HR Schema (Oracle)





• Dropped Departments Vo on page as a form, and created ValueChangeListener on DepartmnetName field to get new value 
  
  
  
  
  
  
  
  


• Now i have written a code to get DepartmentName from current row of Departments VO (ViewObject) and to get from ValueChangeEvent

Method in AMImpl- Called in ValueChangeListener through binding Layer



/**Method to print Department Name */
    public void getDeptNameAction() {
        ViewObject depart = this.getDepartments1();
        Row curRow = depart.getCurrentRow();
        if (curRow != null) {
            System.out.println("Current Department from model is-" + curRow.getAttribute("DepartmentName"));
        }
    }



Code in ValueChangeListener - AM Method Called and Code to get new value from event itself



    /**Value change listener for Department Name
     * @param vce
     */
    public void deptNmVCE(ValueChangeEvent vce) {
        if (vce.getNewValue() != null) {
            System.out.println("New Value in VCE-" + vce.getNewValue());
            BindingContainer bc = BindingContext.getCurrent().getCurrentBindingsEntry();
            OperationBinding ob = bc.getOperationBinding("getDeptNameAction");
            ob.execute();
        }
    }



• In this case when i have changed value on page 








• see the result -output from valuechangelistener- Model layer returns old value :-(





• Now to update value in Model layer , i have just called processUpdates in ValueChangeListener- See the code



    /**Value change listener for Department Name
     * @param vce
     */
    public void deptNmVCE(ValueChangeEvent vce) {
        if (vce.getNewValue() != null) {
            //Method to update Model in VCE
            vce.getComponent().processUpdates(FacesContext.getCurrentInstance());
            System.out.println("New Value in VCE-" + vce.getNewValue());
            BindingContainer bc = BindingContext.getCurrent().getCurrentBindingsEntry();
            OperationBinding ob = bc.getOperationBinding("getDeptNameAction");
            ob.execute();
        }
    }



• see the result -Value is updated in model instantly (in VCE)

so this is how processUpdates works, Cheers :-)

See one more post on this concept with different usecase- Update Model Values while Validation (Exception) occurs on page on Value Change event

Happy Learning