Re: The collection has no foreignkeys, says XDoclet

[Thomas Dudziak]

David Zejda wrote:
I need bidirectional 1:n relation, but I'm still mising something...
Please, have a look on a two simple classes.
package oit.ucase;
/**
 * @ojb.class include-inherited="true"
 *            table="USECASE_HIERARCHY"
 */
public class Deposit
{
    /**
     * Artificial ID key holder
     *
     * @ojb.field nullable="false"
     *            autoincrement="ojb"
     *            primarykey="true"
     */
    private int a_id;
    /**
     * @ojb.collection element-class-ref="oit.ucase.DepositIndulgence"
     *                 collection-class="java.util.TreeSet
     *                 foreignkey="deposit_id"
     *                 auto-retrieve="true"
     *                 auto-update="true"
     *                 auto-delete="true"
     */
    private java.util.SortedSet indulgences = new java.util.TreeSet();
}
package oit.ucase;
/**
 * @ojb.class include-inherited="true"
 *            table="USECASE_HIERARCHY"
 */
public class DepositIndulgence
{
    /**
     * Referential ID key holder
     *
     * @ojb.field
     */
    private int deposit_id;
    /**
     * Holds value of property deposit.
     *
     * @ojb.reference class-ref="oit.ucase.Deposit"
     *                foreignkey="deposit_id"
     *                auto-retrieve="true"
     *                auto-update="false"
     *                auto-delete="false"
     */
    private Deposit deposit;
}
You have a missing quotation mark for the collection-class attribute, 
and thus the remaining attributes are off. If you're using eclipse, you 
might want to try the doclipse plugin which helps a lot with xdoclet tags.
Btw, I don't think that TreeSet works as the collection-class, you 
should use one of the classes provided by OJB. Same for using SortedSet 
as the variable type - you have to use Set here. You shouldn't need to 
specify TreeSet as the collection-class anyway as OJB maintains the 
order that the objects are inserted. So you should be fine with

   /**
    * @ojb.collection element-class-ref="oit.ucase.DepositIndulgence"
    *                 foreignkey="deposit_id"
    *                 auto-retrieve="true"
    *                 auto-update="true"
    *                 auto-delete="true"
    */
   private java.util.Set indulgences = new java.util.TreeSet();
Tom
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