How to delete session bean data

Question

Hi,
My requirement is to default the data while selected in LOV. so i have written written custom code for that using valueChangeListener.
public void getCustomerDetails(ValueChangeEvent valueChangeEvent) {
// Add event code here...
try{
String cardNumber= valueChangeEvent.getNewValue().toString();
System.out.println("card no is: "+cardNumber);
String cardNo="000601029500"+cardNumber;
session.setCardNo(cardNo);
HashMap map=getAm().getCustomerDetails1(cardNumber);
Set set=map.entrySet();
Iterator i = set.iterator();
while(i.hasNext()){
i.next();
if(map.get("customer_name")!=null){
customer_name=map.get("customer_name").toString();
session.setCustName(customer_name);
//System.out.println("customer_name: "+customer_name);
else{
customer_name=null;
In the page:
<af:inputText value="#{SCIISessionBean.merchantName}"
label="#{avtransuiBundle.MERCHANT_NAME}"
required="#{bindings.MerchantName.hints.mandatory}"
columns="#{bindings.MerchantName.hints.displayWidth}"
maximumLength="#{bindings.MerchantName.hints.precision}"
shortDesc="#{bindings.MerchantName.hints.tooltip}"
partialTriggers="ilov1"
binding="#{backingBeanScope.backing_com_wfs_avtranz_newAvtranzSubmit.it1}"
id="it1" readOnly="true">
<f:validator binding="#{bindings.MerchantName.validator}"/>
</af:inputText>
But here my issues is because of putting the value in Session bean it is not clearing when i come to next page to this page. the values are remaining same. i try with request scope and page flow scope because of these when i select any button on or any popup on the page, it got refresh and value is disappering on the page. that's why i have taken session but still session values i am able to see.
can any one tell me how can i make this values as null;

Answer 1

User, you must understand that many of us DO read posts, and do answer questions if we can. But this is NOT our primary job - we do it as a service to our fellow users WHEN WE HAVE TIME. Also, none of us knows everything there is to know - it may be a few days before one of the people who can answer YOUR question will see it and answer. Finally, there are some questions for which no-one will know the answer. Keep working, and maybe you will learn something that YOU can tell US.
Okay, now that that is off my chest:
Values in a session bean start with whatever you initialize them to - either when the property is defined, or in the constructor for the bean. A valueChangeListener can't change the value - this is executed when the USER changes the value. It could be used to drive a change to a different value, but make sure that you set the component with a valueChangeListener to autosubmit, and use partial page rendering to re-render the changed component.
If you need to clear data from a session bean, you will need to write a method to do it. You could write it as an actionListener, and have the user press a Clear button, or as a helper method that gets called as part of some other action. I think that you can also arrange to call it before a page renders, but I haven't had occasion to do that, so I've never researched how to do it.
P.S. When I re-read your post, and tried to understand better what you really want to do, I suddenly realized that you have a classic use-case of a cascading list of values. In other words, the contents of one list of values changes depending on what is selected in another list. If you will look through the tutorials on the main ADF page, I think you will find at least one example of how to do this.