Horizontal mapping + embedded one-to-one problem

Question

Hi,
this message corresponds to the article "Embedded One-to-One mapping
problem". But this article is more exactly then the first without less
unnessary information.
I got an abstract super-class Person which is mapped horizontal.
Student inherits from Person.
Person contains an attribute called location(instance of Class Location)
which should be mapped "embedded one-to-one".
Since Person is mapped horizontal no table will be used for Person.
I get following exception when running mappingtool on action "buildSchema"
kodo.jdbc.meta.MappingInfoNotFoundException: No mapping information was
found for "xxx.yyy.zzz.persistence.jdo.business.Location.lat"
I think Kodo tries to map the field "location" since the field is declared
as embedded. But it can not embed the field since Person is horizontal
mapped and no table for Person exists where the corresponding field of
Location could be placed in. Also it is not possible to set the "embedded"
attribute in the subclass Student for the field "location" because it must
be specified in the superclass.
Can you help me ?
Thanks a lot,
Felix
Additional information:
=======================
Exception stack trace:
[mappingtool] kodo.jdbc.meta.MappingInfoNotFoundException: No mapping
information was found for "xxx.yyy.zzz.persistence.jdo.business.Location".
[mappingtool] at
kodo.jdbc.meta.RuntimeMappingProvider.getMapping(RuntimeMappingProvider.java:44)
[mappingtool] at
kodo.jdbc.meta.MappingRepository.getMappingInternal(MappingRepository.java:352)
[mappingtool] at
kodo.jdbc.meta.MappingRepository.getMapping(MappingRepository.java:307)
[mappingtool] at
kodo.jdbc.meta.MappingRepository.getMapping(MappingRepository.java:162)
[mappingtool] at
kodo.jdbc.meta.MappingTool.buildSchema(MappingTool.java:646)
[mappingtool] at kodo.jdbc.meta.MappingTool.run(MappingTool.java:951)
[mappingtool] at
kodo.jdbc.ant.MappingToolTask.executeOn(MappingToolTask.java:175)
[mappingtool] at com.solarmetric.ant.TaskBase.execute(TaskBase.java:105)
[mappingtool] at
org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:269)
[mappingtool] at org.apache.tools.ant.Task.perform(Task.java:364)
[mappingtool] at org.apache.tools.ant.Target.execute(Target.java:301)
[mappingtool] at
org.apache.tools.ant.Target.performTasks(Target.java:328)
[mappingtool] at
org.apache.tools.ant.Project.executeTarget(Project.java:1215)
[mappingtool] at
org.apache.tools.ant.Project.executeTargets(Project.java:1063)
[mappingtool] at org.apache.tools.ant.Main.runBuild(Main.java:632)
[mappingtool] at org.apache.tools.ant.Main.startAnt(Main.java:183)
[mappingtool] at
org.apache.tools.ant.launch.Launcher.run(Launcher.java:197)
[mappingtool] at
org.apache.tools.ant.launch.Launcher.main(Launcher.java:56)
Here is the JDO-Metadata:
<?xml version="1.0" encoding="UTF-8"?>
<jdo>
<package name="xxx.yyy.zzz.persistence.jdo.business">
<class name="Location"/>
<class name="Person" identity-type="application"
objectid-class="PersonId">
<field name="location" embedded="true"/>
<field name="id" primary-key="true"/>
</class>
<class name="Student" identity-type="application"
persistence-capable-superclass="Person"/>
</package>
</jdo>
Here is the mapping-metadata:
<?xml version="1.0" encoding="UTF-8"?>
<mapping>
<package name="xxx.yyy.zzz.persistence.jdo.business">
<class name="Person">
<jdbc-class-map type="horizontal"/>
</class>
<class name="Student">
<jdbc-class-map type="base" table="STUDENT"/>
<jdbc-version-ind type="version-number" column="JDOVERSION"/>
<jdbc-class-ind type="in-class-name" column="JDOCLASS"/>
<field name="Person.birthDate">
<jdbc-field-map type="value" column="BIRTHDATE"/>
</field>
<field name="Person.city">
<jdbc-field-map type="value" column="CITY"/>
</field>
<field name="Person.id">
<jdbc-field-map type="value" column="ID"/>
</field>
<field name="Person.location">
<jdbc-field-map type="embedded"
null-ind-column="NULL_INDICATOR" synthetic="false">
<field name="lat">
<jdbc-field-map type="value" column="LATITUDE"/>
</field>
<field name="lon">
<jdbc-field-map type="value" column="LONGITUDE"/>
</field>
</jdbc-field-map>
</field>
<field name="Person.name">
<jdbc-field-map type="value" column="NAME"/>
</field>
<field name="Person.picture">
<jdbc-field-map type="value" column="PICTURE"/>
</field>
<field name="Person.state">
<jdbc-field-map type="value" column="STATE"/>
</field>
<field name="Person.street">
<jdbc-field-map type="value" column="STREET"/>
</field>
<field name="Person.zipcode">
<jdbc-field-map type="value" column="ZIPCODE"/>
</field>
</class>
<class name="Location">
<jdbc-class-map type="none"/>
<field name="lat">
<jdbc-field-map type="none"/>
</field>
<jdbc-class-map type="none"/>
<field name="lon">
<jdbc-field-map type="none"/>
</field>
</class>
</package>
</mapping>
Here are the class definitions:
Class Location:
public class Location {
     private int lat;
     private int lon;
Class Person:
public abstract class Person {
private int id;
private String name;
private String street;
private String city;
private String state;
private String zipcode;
private Date birthDate;
private String picture;
private Location location;
Class Person:
public class Student extends Person {

Answer 1

You'll probably have much better luck sending this question to
[email protected]; the newsgroup is generally for quick questions
about certain features or problems the community might be able to solve
without input from SolarMetric developers.