Margaret,
thanks for your reply. However, there are some limitations in
my design. Please read further.
On Fri, 8 Mar 2002, Martin, Margaret wrote:
> Davor,
> In your mapping, you'll need to set up Language with
> depends=ManufacturerInfo and ManufacturerInfo with depends=Manufacturer. You
> also need to make the relationships bidirectional - so within the set/add
> methods for the ManufacturerInfos within Manufacturer, be sure and also set
> the manufacturer into the ManufacturerInfo (ditto for the set/add Languages
> within ManufacturerInfo)...
Language doesn't depend on ManufacturerInfo, it's only used in
in ManufacturerInfo, as well as in ProductInfo, CustomerInfo
and many other different objects. The SQL tables look like
this:
something_info_id | something_id | language_id | something_info
Additionally, languages are already in the database and it is
unlikely that I'll need another language for each
ManufacturerInfo :-). So, how can I set the Language mapping
to depend on many different objects? Also, if I have depends
attribute I cannot persist the object explicitly (via
db.create()) which is not god (I might from time to time have
a need to create another language).
However, I've followed your advices and now I can actually
create Manufacturer with ManufacturerInfo, but, strangelly
enough, manufacturer_id from the table above remains empty
(empty string, not null).
I'm having real troubles with Castor. I'm not even sure it's
suitable for my purposes.
Thanks again,
Davor
>
> Hope this helps...
>
> Margaret Martin
>
> -----Original Message-----
> From: Davor Cengija [mailto:[EMAIL PROTECTED]]
> Sent: Friday, March 08, 2002 1:46 PM
> To: [EMAIL PROTECTED]
> Subject: [castor-dev] Creating object hierarchy
>
>
> Is it possible to persist an object as well as all of its
> childs in a single db.create(obj)? I'm not able to produce a
> mapping for that.
>
> This is my situation:
>
> public Manufacturer {
> String manufacturerId;
> String manufacturerName;
> ArrayList manufacturerInfo;
> // getters, setters, empty constructor
> }
> public ManufacturerInfo {
> String manufacturerInfoId;
> Manufacturer manufacturer;
> Language language;
> String info;
> // getters, setters, empty constructor
> }
> public class Language {
> String languageId;
> String code;
> // getters, setters, empty constructor
> }
>
> When loading Manufacturer by its ID, the complete hierarchy is
> created, with appropriate manufacturerInfo arraylist, which
> contains ManufacturerInfo object for related languages.
>
> But when trying to db.create(manufacturer), only manufacturer
> table is populated, there's no related rows in
> manufacturer_info table.
>
> The client:
>
> Manufacturer manufacturer = new ManufacturerImpl();
> manufacturer.setName("some name");
>
> // prepare ArrayList which will contain infos
> ArrayList infoList = new ArrayList();
>
> // obtain langauge!
> Language lang = new Language("en");
>
> ManufacturerInfo info = new ManufacturerInfoImpl();
> info.setLanguage(lang);
> info.setInfo("This is an info");
> infoList.add(info);
> // same for other langauges
> // ....
> manufacturer.setManufacturerInfo(infoList);
>
> // now try to write it
> db.create(manufacturer);
>
> // manufacturer is created but infos aren't.
>
> My mapping file looks like this:
>
> <mapping>
>
> <class name="LanguageImpl"
> identity="languageId" key-generator="UUID">
> <map-to table="language" xml="Language"/>
> <field name="languageId" type="string">
> <sql name="language_id" type="char"/>
> <bind-xml node="attribute"/>
> </field>
> <field name="code" type="string">
> <sql name="code" type="char"/>
> <bind-xml node="attribute"/>
> </field>
> </class>
>
> <class name="ManufacturerInfoImpl"
> identity="manufacturerInfoId" key-generator="CUUID">
> <map-to table="manufacturer_info" xml="ManufacturerInfo"/>
> <field name="manufacturerInfoId" type="string">
> <sql name="manufacturer_info_id" type="char"/>
> <bind-xml node="attribute"/>
> </field>
> <field name="manufacturer"
> type="net.zuckerfrei.jobst.data.ManufacturerImpl">
> <sql name="manufacturer_id"/>
> <xml name="manufacturer" node="element"/>
> </field>
> <field name="info" type="string">
> <sql name="info" type="char"/>
> <bind-xml node="element" name="Info"/>
> </field>
> <field name="language"
> type="net.zuckerfrei.jobst.data.LanguageImpl">
> <sql name="language_id"/>
> <bind-xml node="element"/>
> </field>
> </class>
>
> <class name="ManufacturerImpl"
> identity="manufacturerId" key-generator="UUID">
> <map-to table="manufacturer" xml="Manufacturer"/>
> <field name="manufacturerId" type="string">
> <sql name="manufacturer_id" type="char"/>
> <bind-xml node="attribute"/>
> </field>
> <field name="manufacturerName" type="string">
> <sql name="manufacturer_name" type="char"/>
> <bind-xml node="element" name="ManufacturerName"/>
> </field>
> <field name="manufacturerInfo"
> type="ManufacturerInfoImpl"
> required="true" collection="arraylist">
> <sql many-key="manufacturer_id"/>
> <bind-xml name="ManufacturerInfo" node="element"/>
> </field>
> </class>
>
> </mapping>
>
> (The sample code shown here is a part of a larger mapping
> file, and java code above is also truncated; irrelevant parts
> are omitted).
>
> What am I doing wrong here? Is it even possible to persist
> newly created object with its complete hierarchy?
>
> Thanks
>
--
Davor Cengija
[EMAIL PROTECTED]
-----------------------------------------------------------
If you wish to unsubscribe from this mailing, send mail to
[EMAIL PROTECTED] with a subject of:
unsubscribe castor-dev
