can a component get its parent type

teknokrat · **Joined:** Thu Aug 28, 2003 10:54 am **Posts:** 67

is it possible for a component to have a reference to its parent object?

thanks

gavin · **Posted:** Fri Nov 21, 2003 6:41 am

yep. even a composite-element.

check out the <parent> tag

bertrand · **Posted:** Fri Nov 21, 2003 6:59 am

gavin wrote:

yep. even a composite-element.

check out the <parent> tag

Hey hey - this is very cool Gavin...
Unfortunately, it doesn't seem to be mentionned in the doc (currently reading the one that comes with 2.1-b6) - or am I looking at the wrong place ?

(but is actually defined in the DTD)

gavin · **Posted:** Fri Nov 21, 2003 7:26 am

Its there:

Code:

        <para>
            The <literal>&lt;component&gt;</literal> element allows a <literal>&lt;parent&gt;</literal>
            subelement that maps a property of the component class as a reference back to the
            containing entity.
        </para>

        <programlisting><![CDATA[<class name="eg.Person" table="person">
    <id name="Key" column="pid" type="string">
        <generator class="uuid.hex"/>
    </id>
    <property name="birthday" type="date"/>
    <component name="Name" class="eg.Name">
        <parent name="namedPerson"/> <!-- reference back to the Person -->
        <property name="initial"/>
        <property name="first"/>
        <property name="last"/>
    </component>
</class>]]></programlisting>

bertrand · **Posted:** Fri Nov 21, 2003 7:45 am

Grrr... indeed, but not obvious to find, you must agree...

To be honest, I like the section 4.1.2 hibernate-mapping where you give kind of synopsis of all types of mapping. In this section you have a component part where you describe part of the properties...

Unfortunately, the parent property is not mentionned.

Don't you think it would be a good idea to add it there as well ?

christian · **Posted:** Fri Nov 21, 2003 7:59 am

Added this to the basic section

bertrand · **Posted:** Fri Nov 21, 2003 8:05 am

Wouah !
Who ever said you don't get support for open source projects ;-)