Re: possibly minor XDoclet bug

[Thomas Dudziak]

David Zejda wrote:
SCENARIO:
There are 2 classes:
abstract class Abstract
class Sub extends Abstract
where Abstract contains collection of Sub type.
PROBLEM:
There are foreign-key tags missing in Torque schema generated by XDoclet.
EXAMPLE:
/**
 * @ojb.class include-inherited="true"
 */
public class Sub extends Abstract
{
}
/**
 * @ojb.class include-inherited="true"
 */
public abstract class Abstract
{
    /**
     * Artificial ID key holder
     *
     * @ojb.field nullable="false"
     *            autoincrement="ojb"
     *            primarykey="true"
     */
    private int a_id;
    /**
     * @ojb.field nullable="false"
     *            column="CLASS_NAME"
     *            jdbc-type="VARCHAR"
     *            length="128"
     */
    private String ojbConcreteClass = this.getClass().getName();
   /**
    * @ojb.collection element-class-ref="test.Sub"
    *                 foreignkey="ab_id"
    *                 remote-foreignkey="su_id"
    *                 indirection-table="ABSTRACT_SUBS"
    *                 auto-retrieve="true"
    *                 auto-update="true"
    *                 auto-delete="true"
    */
    private Sub[] a;
}
generated:
...
    <table name="ABSTRACT_SUBS">
        <column name="ab_id"
                type="INTEGER"
        />
        <column name="su_id"
                type="INTEGER"
        />
    </table>
...
This was a conscious decision. The analysis necessary to determine which 
foreignkeys would be necessary for indirection tables is not trivial 
(esp. when mixing sub-class-mapping to one table via ojbConcreteClass, 
and multiple-joined-tables-mapping via super-references), so I left that 
out for now. I will add this type of foreignkey handling when we have a 
real mapping-to-multiple-tables implementation in OJB (in which case I 
have to adapt the foreignkey handling anyway).

Tom
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