>>>>> "Alex" == Alex Paransky <[EMAIL PROTECTED]> writes:
David> How do you have a method which returns a Collection (or array) of
Alex> value
Selvarajah> objects
David> (non-primitives, user-defined)?
David>
David> I was able to write a method which returns a single value object,
Alex> but I
Selvarajah> can't
David> figure out how to write a method which returns a Collection of
Alex> them.
David>
David> Using JBoss, the method returned in the client without error, and
Alex> it was a
David> Collection, but when I got the Iterator and started stepping
Alex> through it,
Selvarajah> the
David> first entry wasn't an object of my value object class, but of the
Alex> class
David> "$Proxy2".
Selvarajah> Hi David,
Selvarajah> make sure your VO implements serialaizable.( and also your
Alex> collection class)
Selvarajah> I am not sure about arrays. But I used Vector and it's
Alex> worked with almost
Selvarajah> all app servers including JBoss.( any other java.util.
Alex> COLLECTION CLASSES
Selvarajah> that implements io.serializable should also work)
Selvarajah> I don't think you need any of these for primitives.
Alex> I was using "Collection". I just tried changing to "ArrayList", and it had
Alex> no
Alex> effect.
Alex> Note that I appear to have no problem getting the object of the collection
Alex> class, either "Collection" or "ArrayList", but when I try to pull an object
Alex> out
Alex> of the collection, it is of type "$Proxy2", and not my value object class.
Alex> Also note that my value object class implements Serializable.
Alex> Your value objects wouldn't by some strange chance be EJB entity objects, or
Alex> remote implementation objects, would they? How about a code snippet of your
Alex> Value object definition, and the method which returns the value object to
Alex> the client, and the client code which tries to access the value object.
Value object:
------------------
package com.intsoft.sgs.ejb;
import java.io.*;
public class RosterEntry implements Serializable
{
public String studentSsn;
public String grade;
public RosterEntry() {}
public RosterEntry(String studentSsn, String grade)
{
this.studentSsn = studentSsn;
this.grade = grade;
}
public String getStudentSsn() { return (studentSsn); }
public String getGrade() { return (grade); }
public void setStudentSsn(String studentSsn)
{ this.studentSsn = studentSsn; }
public void setGrade(String grade)
{ this.grade = grade; }
}
------------------
Method which returns the list of RosterEntry objects:
------------------
public ArrayList getRoster() throws IllegalRosterAccessException
{
ArrayList result = null;
try
{
InitialContext jndiContext = new InitialContext();
Object ref =
jndiContext.lookup("sgs/StudentClassGrade");
StudentClassGradeHome scgHome =
(StudentClassGradeHome) PortableRemoteObject.
narrow(ref, StudentClassGradeHome.class);
Collection scgList = scgHome.findByClassName(name);
result = new ArrayList(scgList);
}
catch (NamingException ex)
{
System.out.println(ex);
ex.printStackTrace();
}
catch (RemoteException ex)
{
System.out.println(ex);
ex.printStackTrace();
}
catch (FinderException ex)
{
System.out.println(ex);
ex.printStackTrace();
}
return (result);
}
------------------
Client code:
------------------
Object ref = jndiContext.lookup("sgs/Class");
ClassHome home =
(ClassHome) PortableRemoteObject.narrow(ref, ClassHome.class);
Collection allClasses = home.findAll();
Object[] classes = allClasses.toArray();
for (int ctr = 0; ctr < classes.length; ++ ctr)
{
ClassRemote classRemote = (ClassRemote) classes[ctr];
ArrayList roster = classRemote.getRoster();
------------------
--
===================================================================
David M. Karr ; Best Consulting
[EMAIL PROTECTED] ; Java/Unix/XML/C++/X ; BrainBench CJ12P (#12004)
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