Hello there!
I'm new to OJB. I've tried a simple O/R mapping and it worked, but when
i've tried to map real life objects i got a problem.
There are three classes:
LOMGeneralObject & LOMGeneralLanguage & LangString:
public class LOMGeneralObject {
private BigDecimal identifier;
private LangString title;
private BigDecimal titleId;
private Vector language;
.....
}
public class LOMGeneralLanguage {
BigDecimal id;
String language;
LOMGeneralObject gen_object;
BigDecimal gid;
......
}
public class LangString {
BigDecimal id;
String string;
String language;
....
}
there are also some SQL tables (postgres) for them:
TABLE GENERAL:
IDENTIFIER SERIAL PRIMARY KEY
TITLE DECIMAL(10,0)
TABLE LANGSTRING:
ID SERIAL
LANGUAGE VARCHAR
STRING VARCHAR
TABLE GENERAL_LANGUAGE:
ID SERIAL PRIMARY KEY
LANGUAGE VARCHAR
GID DECIMAL(10,0)
and here goes XML-mapping for them:
<class-descriptor class="ru.chemnet.lom.LOMGeneralObject"
table="GENERAL" >
<field-descriptor name="identifier" column="identifier"
sequence-name="general_identifier_seq" jdbc-type="NUMERIC"
autoincrement="true" primarykey="true" />
<field-descriptor name="titleId" column="title"
jdbc-type="NUMERIC"/>
<reference-descriptor name="title"
class-ref="ru.chemnet.lom.LangString" auto-retrieve="true"
auto-update="true" auto-delete="true" >
<foreignkey field-ref ="titleId" />
</reference-descriptor>
<collection-descriptor name="language"
element-class-ref="ru.chemnet.lom.LOMGeneralLanguage" orderby="id"
sort="DESC" >
<inverse-foreignkey field-ref="gid"/>
</collection-descriptor>
</class-descriptor>
<class-descriptor class="ru.chemnet.lom.LangString" table="LANGSTRING" >
<field-descriptor name="id" column="id" jdbc-type="NUMERIC"
autoincrement="true" primarykey="true"
sequence-name="langstring_id_seq" />
<field-descriptor name="language" column="language"
jdbc-type="VARCHAR" />
<field-descriptor name="string" column="string"
jdbc-type="VARCHAR" />
</class-descriptor>
<class-descriptor class="ru.chemnet.lom.LOMGeneralLanguage"
table="GENERAL_LANGUAGE">
<field-descriptor name="id" column="id" jdbc-type="NUMERIC"
autoincrement="true" primarykey="true"
sequence-name="general_language_id_seq" />
<field-descriptor name="language" column="language"
jdbc-type="VARCHAR"/>
<field-descriptor name="gid" column="gid" jdbc-type="NUMERIC"/>
<reference-descriptor name="gen_object"
class-ref="ru.chemnet.lom.LOMGeneralObject" auto-retrieve="true"
auto-update="true" auto-delete="true">
<foreignkey field-ref="gid"/>
</reference-descriptor>
</class-descriptor>
The problem is that I try to make LOMGeneralObject and to store it.
title field of LOMGeneralObject stores to LANGSTRING table perfectly,
but
LOMGeneralObject.title of Vector type doesn't make any records in
GENERAL_LANGUAGE at all.
I've read Advanced O/R mapping tutorial for hundred times and still
cannot find out what' wrong.
May be someone can help me? Thank you.
--
Regards,
CEO Linux-Online.Ru
Korolyov Timofey
www.linuxshop.ru :: www.prefnews.ru :: www.dotstyle.ru
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