ternary association problem

dtam · **Joined:** Tue Jan 06, 2004 4:51 pm **Posts:** 48

Hi,

I'm getting a when I try to access a ternary:

Code:

net.sf.hibernate.MappingException: component class not found
   net.sf.hibernate.cfg.Binder.bindComponent(Binder.java:764)

Here is my mapping file:

Code:

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
          "-//Hibernate/Hibernate Mapping DTD 2.0//EN"
          "http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd">

<hibernate-mapping>
  <class name="com.cc.tss.TaskTemplate" table="task_template">

    <id name="id" type="integer" column="id">
        <generator class="sequence">
            <param name="sequence">task_template_id_seq</param>
        </generator>
    </id>

    <property name="name" column="name" type="string"/>
          
    <set    name="tasksAndPayRates"
            table="task_task_template" 
            lazy="false"
            order-by="task_id"
            cascade="all">
        <key column="template_id"/>
        <composite-element class="TaskAndPayRate">
            <many-to-one name="task" class="Task" column="task_id"/>
            <many-to-one name="payRate" class="PayRate" column="pay_rate_id"/>
        </composite-element>
    </set>

  </class>
</hibernate-mapping>

Task and PayRate are both defined with their own mapping files (that work). My tables look like:

task_template (id, name)
task_task_template (template_id, task_id, payRate_id)

Any help would be appreciated!

emmanuel · **Posted:** Tue Jan 27, 2004 8:56 pm

set the full class name on it.

dtam · **Joined:** Tue Jan 06, 2004 4:51 pm **Posts:** 48

Thanks, that worked.

However, despite my cascade="all" attribute it isn't updating the set table "task_task_template". Any ideas?

emmanuel · **Posted:** Thu Jan 29, 2004 7:08 pm

Using composite-elements and components in general means you don't need to map them as entities. But you did it

Quote:

Task and PayRate are both defined with their own mapping files (that work).

Remove them

emmanuel · **Posted:** Thu Jan 29, 2004 7:09 pm

and cascade is useless in this case (composite-elements)

jcasp · **Joined:** Fri Jan 30, 2004 6:48 pm **Posts:** 12

Can ternary associations done this way be represented in xdoclet? I see the @hibernate.collection-composite-element tag but am not sure how to go about defining the many-to-ones nested inside the <composite-element> tag. In the case above, what should the TaskAndPayRate class look like? can I put xdoclet tags in my analogous class even though the class isn't meant to be persisted on it's own?

I tried doing a ternary assoc. via xdoclet using the map index association strategy, but had problems with cascade-delete of the map's keys.

thanks in advance
Justin

jcasp · **Joined:** Fri Jan 30, 2004 6:48 pm **Posts:** 12

I figured this out after a little more trial and error. I simply gave the composite element class getters and setters for the many-to-one objects and set @hibernate.many-to-one tag for each of them. no other hibernate tags were needed.