Hi.

I posted a question earlier about ternary associations, but...

The prblem is I can't make the code work. I have three classes;
InfoContact, ContactField and ContactMeta. They all should be associated
by a fourth class, ContactDataNode. The InfoContact object holds a List
of ContactDataNode objects. ContactField and ContactMeta also holds a Set of
ContactDataNodeObjects. I assume you have to "inform" these
objects of the ternary association class in order
to be able to pose HQL-questions to ContactDataNode. Is thei correct?
Here is the appropriate (I hope) mapping snippets:

=================================================
<class
name="ks.rah.cainfo.db.model.InfoContact"
table="CONTACT"
dynamic-update="false"
dynamic-insert="false">
..
..
<list
name="data"
lazy="true"
inverse="true"
cascade="save-update">

<key column="CONTACT_FK"/>

<index column="I"/>

<one-to-many class="ks.rah.cainfo.db.model.ContactDataNode"/>
</list>
...
</class>
==================================================
<class
name="ks.rah.cainfo.db.model.ContactField"
table="CONTACT_FIELD"
dynamic-update="false"
dynamic-insert="false"
>
..
..
<set
name="answers"
lazy="false"
inverse="true"
cascade="save-update"
sort="unsorted">

<key column="ANSWERFIELD_FK" />
<one-to-many class="ks.rah.cainfo.db.model.ContactDataNode" />
</set>
...
</class>
==================================================
<class
name="ks.rah.cainfo.db.model.ContactMeta"
table="CONTACT_META"
dynamic-update="false"
dynamic-insert="false">
..
..
<set
name="answers"
lazy="false"
inverse="true"
cascade="save-update"
sort="unsorted">

<key column="META_FK"/>
<one-to-many class="ks.rah.cainfo.db.model.ContactDataNode"/>
</set>
..
</class>
==================================================
<class
name="ks.rah.cainfo.db.model.ContactDataNode"
table="DATANODE"
dynamic-update="false"
dynamic-insert="false">

<id
name="id"
column="id"
type="java.lang.Long"
unsaved-value="null">
<generator class="native">
</generator>
</id>

<many-to-one
name="contact"
class="ks.rah.cainfo.db.model.InfoContact"
cascade="none"
outer-join="auto"
update="true"
insert="true"
column="CONTACT_FK"
not-null="true"/>

<many-to-one
name="field"
class="ks.rah.cainfo.db.model.ContactField"
cascade="none"
outer-join="auto"
update="true"
insert="true"
column="ANSWERFIELD_FK"
not-null="true"
unique="false"/>

<many-to-one
name="value"
class="ks.rah.cainfo.db.model.ContactMeta"
cascade="none"
outer-join="auto"
update="true"
insert="true"
column="META_FK"
not-null="true"
unique="false"/>

</class>
=====================================================
I have tried to add three add-methods to ContactDataNode

public ContactDataNode addContact(InfoContact contact) {
this.setContact( contact );
contact.getData().add(this);
return this;
}

public ContactDataNode addValue(ContactMeta meta) {
this.setValue( meta );
meta.getAnswers().add(this);
return this;
}

public ContactDataNode addField(ContactField field) {
this.setField( field );
field.getAnswers().add(this);
return this;
}

These three I have put in InfoContact:

public void addData(ContactField field, ContactMeta value) {
ContactDataNode node = new ContactDataNode();
node.addField(field).addValue(value);
this.getData().add(node);
}

However, when i repeatedly invoke this method, the List of
datanodes is constantly '1', and when I send it to a business
object for persistence to database, only one entry is created
in the ContactDataNode-table.

I've also tried the following code in my application:
..
..

InfoContact contact = new InfoContact();
ContactField currentField = null;
ContactMeta currentValue = null;
ArrayList data = new ArrayList();
..
..


currentField = HibernateGetField(argument); //Codescetch:this works!
currentValue = HibbernateGetValue(anotherArgument); //Codescetch:this works too!
data.add( new ContactDataNode(null, contact, currentField, currentValue );

currentField = HibernateGetField(argument2); //Codescetch:this works!
currentValue = HibbernateGetValue(anotherArgument2); //Codescetch:this works too!
data.add( new ContactDataNode(null, contact, currentField, currentValue );

contact.setData(data);
contactBusinessObject.create(contact);
..

Now nothing is persisted to ContactDataNode-table, but the InfoContact is persisted.

What am I doing wrong?

Thanks in advance!

/F