From gbadner at redhat.com Tue May  8 18:13:49 2018
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From: Gail Badner <gbadner at redhat.com>
To: hibernate-dev at lists.jboss.org
Subject: [hibernate-dev] JPA XML ORM descriptors id-class and id
Date: Tue, 08 May 2018 15:13:47 -0700
Message-ID: <CAFDzhiTVd5XD8WYVi45DmjaAX10oGHJZPnM=kN4OmS3V2+yeLQ@mail.gmail.com>

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When an entity with an IdClass is mapped using XML ORM descriptors,
Hibernate requires the Id properties to be mapped as well, as in the
following example:

<entity class=3D"Employee">

   <table name=3D"entityobject"/>
   <id-class class=3D"EmployeeId"/>
   <attributes>
      <id name=3D"fname"/>
      <id name=3D"lname"/>
   </attributes>
</entity>

If the <id> elements are not included, an exception is thrown:

"No identifier specified for entity: ..."

Should Hibernate require the <id> elements to be explicitly mapped, or
should it be able to determine this information by reflection from the
class configured by <id-class>?

Regards,
Gail

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