Hi guys! I have a tree structure table and use the composite pattern

...........................
<set name="child" inverse="true" lazy="false" cascade="save-update">
<key column="industry_id_fk"/>
<one-to-many class="com.eon.cms.vo.Industry"/>
</set>
<many-to-one name="parent" column="industry_id_fk" cascade="save-update" class="com.eon.cms.vo.Industry"/>
............................

and its working fine. I'm displaying it as a tree in jsp( using javascript). My problem is this i want my data to be displays all the nodes that have children first. But the data return by set is inconsistent.

first query:

A
---A1
-----A1.2
---A2

as i query again here's the result:

A
---A2
---A1
-----A1.2

Do i missed something here?


thanks.

raymond

In this case I would really recommend using the sort attribute of the set mapping, and use a custom comparator (I think you have to use a SortedSet probably)

Does anyone teach me to use the sort attribute of set using the "comparator class"?

<!ATTLIST set sort CDATA "unsorted">
<!-- unsorted|natural|"comparator class" -->

Just specify the class name of a class you write which implements the comparator interface I think. Probably you might need to use SortedSet in your classes for the association, I am not sure though. Might work without changes in the class, too.