you can do:
broker = ServiceLocator.getInstance().findBroker();
FieldDescriptor[] pkFields = broker.getClassDescriptor
(realClass).getPkFields();
String[] fieldNames = new String[pkFields.length];
for (int i=0; i<pkFields.length ;i++){
fieldNames[i]=pkFields[i].getAttributeName();
}
Identity oid = broker.serviceIdentity().buildIdentity(realClass, fieldNames,
pkValues);
result = broker.getObjectByIdentity(oid);
where pkValues is an array with your key values.
pkValues should have the same order of pk field values in repository.
You can have a look at it.aco.mandragora.dao.ojb.pb.OjbPbDAO in the method
public Object findByPrimaryKey(Class realClass,Object[] pkValues)
you can find it at
http://sourceforge.net/projects/mandragora/
See you
On 7/6/05, JML (Brujula) <[EMAIL PROTECTED]> wrote:
>
> Hi!
>
> I want to put into cache memory a table which has a primary key
> composite of various (two) fields. In repository.xml this table is
> mapped as follow:
>
> <class-descriptor class="com.brujulatelecom.srv.vo.ParametroOficinaVO"
> table="T_SRV_PARAMETROOFICINA">
> <object-cache
> class="com.brujulatelecom.srv.util.ObjectCacheOSCacheImpl"/>
> <field-descriptor id="1" name="pofCodigo" column="POF_CODIGO"
> jdbc-type="INTEGER"/>
> <field-descriptor id="2" name="pofOfiCodigo" column="POF_OFICODIGO"
> jdbc-type="INTEGER" primarykey="true"/>
> <field-descriptor id="3" name="pofParCodigo" column="POF_PARCODIGO"
> jdbc-type="INTEGER" primarykey="true"/>
> </class-descriptor>
>
> In DAO class, the code is:
>
> PersistenceBroker broker = null;
> ParametroOficinaVO parametroOficinaVO = null;
> broker = ServiceLocator.getInstance().findBroker();
> // start caching management
> parametroOficinaVO = new ParametroOficinaVO();
> parametroOficinaVO.setPofParCodigo(new Integer(parCodigo));
> parametroOficinaVO.setPofOfiCodigo(new Integer(ofiCodigo));
> Identity oid = new Identity(parametroOficinaVO, broker);
> ObjectCache cache = broker.serviceObjectCache();
> parametroOficinaVO = (ParametroOficinaVO)cache.lookup(oid);
> // final caching management
> if (parametroOficinaVO==null){
> System.out.println("parametroOficinaVO not in cache:
> " + oid);
> Criteria criteria = new Criteria();
> criteria.addEqualTo("pofParCodigo", parCodigo);
> criteria.addEqualTo("pofOfiCodigo", ofiCodigo);
> Query query = new
> QueryByCriteria(ParametroOficinaVO.class, criteria);
> parametroOficinaVO =
> (ParametroOficinaVO)broker.getObjectByQuery(query);
> } else {
> System.out.println("parametroOficinaVO in cache: " + oid);
> }
>
> Is this correct?
>
> Thank you for advance!!
>
> Joan Miralles Ramis
> Junior Programmer
> Development Department
> Brújula Telecom
>
>
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