How to clear exception cache in VO when using OAAttrValException

Question

I am using OAAttrValException to validate that individual required attributes are populated before a user can submit the page. The function i have in the VOImpl is as follows
public void validateRow() {
ArrayList exceptions = new ArrayList();
String address1 = (String)getCurrentRow().getAttribute("Address1");
String postCode = (String)getCurrentRow().getAttribute("PostalCode");
if (address1==null) {
MessageToken[] tokens = { new MessageToken("FIELD", address1) };
exceptions.add( new OAAttrValException(OAException.TYP_VIEW_OBJECT
, getViewObject().getFullName() // VO name
, getCurrentRow().getKey() // VO PKs
, "Address1" // Attribute Name
, address1 // Attribute value
, "XX" // Message product short name
, "NTZZ_CZ_ADDRESS_FIELD_REQUIRED"// Message name
, tokens)); // Message Parameters
if (postCode==null) {
MessageToken[] tokens = { new MessageToken("FIELD", postCode) };
exceptions.add( new OAAttrValException(OAException.TYP_VIEW_OBJECT
, getViewObject().getFullName() // VO name
, getCurrentRow().getKey() // VO PKs
, "PostalCode" // Attribute Name
, postCode // Attribute value
, "XX" // Message product short name
, "NTZZ_CZ_ADDRESS_FIELD_REQUIRED"// Message name
, tokens)); // Message Parameters
OAException.raiseBundledOAException(exceptions);
The problem is that every time you click submit it adds these exceptions to the list of exception already thrown i.e. it doesnt seem to clear the exceptions from the last submit, so the list of exception messages just gets longer and longer. Ideally I would like to flush these messages on submit but before I validate using something like clearAllExceptions() as in the EOImpl, but this method does not appear to be available in he VO.
Does anyone have any suggestions about how I can achieve this?
Thanks,
Danny

Answer 1

Danny,
The simple and straight solution to your problem in that the row validation code you are writing is written in wrong file.VOIMpl file should only contain logic related to query manipulation of View Object. If you wanna do row validation at vo level, this code should go in VORowimpl file and not VOimpl file. In VORowimpl file BC4J framework provides a method called validate(), you can utilise that.The validate() method is automically called every time a post event has been generated.The method in turn invokes validate entity method in each of the entity objects involved in VO.
This validate method is called in process form data in OAF lifecycle. So this how your code should look like in VORowimpl :
public void validate()
super.validate();
ArrayList exceptions = new ArrayList();
String address1 = (String)getCurrentRow().getAttribute("Address1");
String postCode = (String)getCurrentRow().getAttribute("PostalCode");
if (address1==null) {
MessageToken[] tokens = { new MessageToken("FIELD", address1) };
exceptions.add( new OAAttrValException(OAException.TYP_VIEW_OBJECT
, getViewObject().getFullName() // VO name
, getCurrentRow().getKey() // VO PKs
, "Address1" // Attribute Name
, address1 // Attribute value
, "XX" // Message product short name
, "NTZZ_CZ_ADDRESS_FIELD_REQUIRED"// Message name
, tokens)); // Message Parameters
if (postCode==null) {
MessageToken[] tokens = { new MessageToken("FIELD", postCode) };
exceptions.add( new OAAttrValException(OAException.TYP_VIEW_OBJECT
, getViewObject().getFullName() // VO name
, getCurrentRow().getKey() // VO PKs
, "PostalCode" // Attribute Name
, postCode // Attribute value
, "XX" // Message product short name
, "NTZZ_CZ_ADDRESS_FIELD_REQUIRED"// Message name
, tokens)); // Message Parameters
OAException.raiseBundledOAException(exceptions);
Sumit,
Making Arraylist defined globally in VOimpl class would not solve the purpose, because in present code ArrayList has been initialized inside validateRow() method hence, everytime this method is called Arraylist is automatically initialized by new , but the errorstack is not cleared.This code should be at such a place where it should be automaticallyclear the last error stack when its called everytime in framework i.e. validate method in VOImpl or validateEntity method in EOImpl.
I hope this helps.
--Mukul