Error 'Inconsistent datatypes' with Java classes

Question

Hi,
I have some Java classes loaded in Oracle 8.1.6, mapped as Object Types, so when I create one object from PL/SQL, JVM ought to create the matching Java object, communicating via the SQLData interface.
Unfortunately, after the code:
pippo:=OraMailer('mail.server.com','mymail');
that creates the PL/SQL object, any code that use member procedures or function wrapping instance methods of the Java class fails with the error 932: Inconsistent datatypes.
I looked for a mistake in my PL/SQL and Java code, but no error was found.
It is very important: help me!!!
Thx

Answer 1

So here is what you are doing:
ArrayList results = //get employees from database
ListIterator langIt = results.listIterator();
while (langIt.hasNext()) {
  Employee emp = langIt.next();
  String name2 = emp.getName();
  String SSNo = emp.getSSNum();
  results.add(name2);
  results.add(SSNo);
}So you get a list or Employee objects, then you get an iterator over the list. For each Employee in the list you add the name and SSNo as Strings back to the same list. From the API for ConcurrentModificationException the exception can be thrown when you modify a collection while iterating over the collection - which is precisely what you are doing.
The ListIterator interface allows you to modify the list through its own methods. Try using:
  langIt.add(name2);
  langIt.add(SSNo);instead.
Why are you taking the name and SSNo out of the Employee object and placing them back in the same List anyway? That makes no sense to me.