Extending/Modifying VOImpl Class Methods

Hi All
In iExpense Module, there is one CreditCardsVO, which is already extended by a developer as BTCreditCardsVO
The standard CreditCardsVOImpl class has its contructor method, executeQuery, encodeCardNumber, etc methods.
My requirement is to modify the encodeCardNumber method ( This method masks the CreditCard Number with '****' , leaving just last 4 digits to display using substring function)
I need to modify this 4 digits to 9 digits.
This encodeCardNumber is called in executeQuery method. Also, this method is private type.
Extending standard VO is possible and usually SQLs are modified to add new columns.
Is it possible to modify/extend the methods of the standard VOImpl classes.
Rgds
Vaddi Rakesh

Hi Kumar,
Thanks for the reply.
Correct me if I have got it wrong.
To extend the private method EncodeCardNumber, I need to copy the standard ExecuteQuery method in the extended VOImpl class and also the EncodeCardNUmber method with modifications.
I have Copy/Pasted whats in the standard VOImpl and Also what I intend to change in extended VOImpl.
Standard VOImpl Class:
public class CreditCardsVOImpl extends OAViewObjectImpl
public CreditCardsVOImpl()
public void executeQuery()
super.executeQuery();
while(hasNext())
CreditCardsVORowImpl creditcardsvorowimpl = (CreditCardsVORowImpl)next();
String s = creditcardsvorowimpl.getCardProgramName() + encodeCardNumber(creditcardsvorowimpl.getCardNumber());
creditcardsvorowimpl.setDisplayedValue(s);
if(Boolean.TRUE.equals(isMultPaymentsForCard(creditcardsvorowimpl)))
creditcardsvorowimpl.setDisplayedValue(creditcardsvorowimpl.getDisplayedValue() + " - " + creditcardsvorowimpl.getPaymentDueFrom());
private String encodeCardNumber(String s)
if(s.length() > 4)
return " ****" + s.substring(s.length() - 4);
else
return " ****";
/// Other Public methods ...........
Extended Code :
public class BTCreditCardsVOImpl extends CreditCardsVOImpl
* This is the default constructor (do not remove)
public BTCreditCardsVOImpl()
// COPIED FROM STANDARD VOImpl CLASS
public void executeQuery()
super.executeQuery();
while(hasNext())
CreditCardsVORowImpl creditcardsvorowimpl = (CreditCardsVORowImpl)next();
String s = creditcardsvorowimpl.getCardProgramName() + encodeCardNumber(creditcardsvorowimpl.getCardNumber());
creditcardsvorowimpl.setDisplayedValue(s);
if(Boolean.TRUE.equals(isMultPaymentsForCard(creditcardsvorowimpl)))
creditcardsvorowimpl.setDisplayedValue(creditcardsvorowimpl.getDisplayedValue() + " - " + creditcardsvorowimpl.getPaymentDueFrom());
// MY VERSION OF ENCODE METHOD
private String encodeCardNumber(String s)
if(s.length() > 4)
return " ****" + s.substring(s.length() - 9); // changed from 4 to 9
else
return " ****";
My Query would be, the ExecuteQuery would be calling super.executeQuery.
Does this refer back to Standard ExecuteQuery and then subsequent EncodeCardNumber.
Or is it, my concepts are not clear. And extending the Standard methods, would simply replace any call to the methods of the Standard class, with the ones extended in the Extended VOImpl
Please advise
Rgds
Vaddi Rakesh

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