Hello

I was wondering if all functional aspects provided by .hbm.xml mapping files were also supported by annotations
I've written a quite complex source code with .hbm.xml mapping files which works perfectly well under
hibernate 3.2.6 GA and entity-manager 3.3.2 GA and wanted to move to annotations

things which seem to me a little bit awkward to guess from docs are sub classes with mixed discriminant and joined subtables
like in the following example

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

<hibernate-mapping default-lazy="false" default-cascade="all" package="test.messages">
<class name="InfoGroup" table="InfoGroups">

<id name="dbId" column="db_id" type="long">
<generator class="native"/>
</id>
<discriminator column="tag" type="string"/>
<timestamp name="lastModified" column="last_modified" source="db"/>
<property name="created" type="timestamp" insert="false" update="false" generated="insert"/>

<property name="digest" column="digest" type="string"/>

<properties name="key" unique="true">
<property name="active" column="is_active" type="boolean" not-null="true" index="ix_infogroups_ac"/>
<property name="journalId" column="distro_id" type="long" index="ix_infogroups"/>
<property name="name" column="name" type="string" index="ix_infogroups"/>
<property name="version" column="version" type="string"/>
<property name="release" column="infogroup_release" type="string"/>
</properties>
<property name="description" column="description" type="text"/>
<property name="category" column="category" type="string"/>

<subclass name="MovieInfo" discriminator-value="MovieInfo"/>
<subclass name="MusicInfo" discriminator-value="MusicInfo"/>
<subclass name="SpecialInfo" discriminator-value="SpecialInfo">
<join table="Specials">
<key column="db_id" foreign-key="fk_special_infogroup"/>
<property name="Specialty" column="is_special" type="boolean"/>
</join>
</subclass>
<subclass name="MyInfo" discriminator-value="MyInfo">
<set lazy="true" name="journals" table="lt_myinfo_journals">
<key column="myinfos_journals_id" foreign-key="fk_myinfo_journals_id"/>
<many-to-many class="Journal" column="journal_id" foreign-key="fk_myinfo_journals"/>
</set>
<join table="MyInfos">
<key column="db_id" foreign-key="fk_myinfo_infogroup"/>
<property name="revision" column="revision" type="integer"/>
</join>
</subclass>
</class>
</hibernate-mapping>

I tried hbm2java with jdk5=true & ejb3=true but it does not seem to be able to handle this properly as I could not find
anything in the generated code which looks like @Discriminator ...

thanks in advance

Ok going step by step in hibernate code I found out what was wrong

Main class:

@Entity
@DiscriminatorColumn(name = "tag", discriminatorType = DiscriminatorType.STRING)
@Inheritance(strategy = InheritanceType.JOINED)
@Table(name = "InfoGroups", uniqueConstraints = @UniqueConstraint(columnNames = {"is_active", "journal_id", "name", "version", "infogroup_release"}))
@XmlRootElement(name = "PkgGroup")
public class InfoGroup implements Serializable {

...
}

for discriminant only inheritence

@Entity
@DiscriminatorValue("MovieInfo")
public class MovieInfo extends InfoGroup implements Serializable {
...
}

and for joined and discriminant inheritence

@Entity
@DiscriminatorValue("SpecialInfo")
@PrimaryKeyJoinColumn(name="db_id")
@Table(name = "Specials")
public class SpecialInfo extends InfoGroup implements Serializable {
...
}

do not try to specify the table for discriminant only inherience else you'll run into hibernate exception at runtime