Trying to set a calculated attribute in an entity implementation java file

Question

Hi,, im working in Jdeveloper 9.0.3.2 in a web application and the problem is as follow:
I have one table, This table has an attribute which value is calculated from another attribute in the same table. Take in account That it is not a trascient column, it is a real entity column in the entity object.
First i tried this by using custom code in the validateEntity method but it was impossible because of the error: "JBO-28200: Validation threshold limit
reached. Invalid Entities still in cache".
next, i try the same by using custom code in the setter and getter methods by using the populateAttribute method and seems that transaction is successful but this result is only reflected in the entity cache so when im query directly the database this attribute is empty.
I have not idea what to do.. im bored trying to get solution to this problem.
Please help me!!!
Thank u
Orlando Acosta
Infogroup Team
Colombia South America

Answer 1

Thank you very much for the answer.
I tried to do what you suggested, but I get an error message when I tried to put session data into the user session object on my JSP page.
Here is part of my codes in the JSP page.
<%
// Retrieve all request parameters using our routine to handle multipart encoding type
RequestParameters params = HtmlServices.getRequestParameters(pageContext);
String dsParam = params.getParameter("datasource");
String formName = dsParam + "_form";
String rowAction = "Current";
String event = "Update";
String userName = (String) session.getAttribute("userName");
if (!(getDBTransaction().getSession().getUserData().containsKey("user")))
getDBTransaction().getSession().getUserData().put("user",userName);
%>
And here is my error message.
Error(16,16): method getDBTransaction not found in class _DecalDataEditComponent
I got the other half working where I retrieved the session data in a setter method of an Entity Object Class as below.
public void setDestroy(Date value)
if (value!=null)
setDestroyedBy((String)getDBTransaction().getSession().getUserData().get("user"));
setAttributeInternal(DESTROY, value);
Your help is very appreciated.