Hi,

Is it possible to represent object hierarchies in Hibernate? I would like to persist a node object, which can contain one or more node objects (of the same type), creating a hierarchical structure.

Any help would be very appreciated,
Thanks
Matt

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping>
<class dynamic-update="true" table="TEAM_UPDATE_WINDOW" dynamic-insert="true" name="com.newsint.fantasygames.domain.game.TeamUpdateWindow">
<id unsaved-value="null" name="id" type="long">
<column name="TEAM_UPDATE_WINDOW_ID" not-null="true"/>
<generator class="sequence"/>
</id>
<many-to-one column="TEAM_UPDATE_WINDOW_TYPE_ID" foreign-key="UPDATE_SESSION_TYPE_FK" class="com.newsint.fantasygames.domain.game.TeamUpdateWindowType" lazy="true" name="teamUpdateWindowType"/>
<property name="costOfTeamUpdateWindow" column="COST"/>
<property name="noOfTransfersApplicable" column="NO_OF_TRANSFERS_APPLICABLE"/>
<many-to-one column="CURRENCY" foreign-key="CURR_UPDATE_SESSION_FK" class="com.newsint.fantasygames.domain.Currency" lazy="true" name="currency"/>
<property name="endDate" column="END_DATE"/>
<property name="startDate" column="START_DATE"/>
<property name="showTransfers"/>
<many-to-one column="PARENT_ID" foreign-key="PARENT_UPDATE_SESSION_FK" class="com.newsint.fantasygames.domain.game.TeamUpdateWindow" lazy="true" name="parentWindow"/>
<list inverse="false" lazy="true" name="windows">
<key column="PARENT_ID"/>
<list-index column="DISPLAY_IDX" base="0"/>
<one-to-many class="com.newsint.fantasygames.domain.game.TeamUpdateWindow"/>
</list>
<property name="leniencyCutoff"/>
<property name="allowTransfers"/>
</class>
</hibernate-mapping>
please rate