[castor-user] Marshalling/Unmarshalling collections

[Matías E. Bagini]

I have a class called Client like this..

public class Client {
        private Long id;
        
        private String firstName;
        private String lastName;
        private Collection<String> emails = new Vector<String>();

        /**
         * @return Returns the emails.
         */
        public Collection<String> getEmails() {
                return emails;
        }
        

        /**
         * @param emails The emails to set.
         */
        public void setEmails(Collection<String> emails) {
                this.emails = emails;
        }
        
        /**
         * @param email The email to add.
         */
        public void addEmail(String email) {
                this.emails.add(email);
        }

        /** more methods... */
        
}

When I marshal a Client object I get something like

<client>
  <first-name>a</first-name>
  <last-name>b</last-name>
  <emails>[EMAIL PROTECTED]</emails>
  <emails>[EMAIL PROTECTED]</emails>
</client>

Although I'd prefer <email> instead of <emails> it's ok.. the problem is 
when I want to unmarshall it.. it fails ("cannot instantiate 
java.util.Collection") .. but it works if I write <email> .. like this:

<client>
  <first-name>a</first-name>
  <last-name>b</last-name>
  <email>[EMAIL PROTECTED]</email>
  <email>[EMAIL PROTECTED]</email>
</client>

The problem is that I want to work with the same XML when marshalling 
and unmarshalling, and WITHOUT ANY XML MAPPING FILE.

So, how can I use the same XML for marshalling/unmarshalling collections 
WITHOUT any XML mapping file?

Thanks,

Matias.


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