Hi,
I try to use the ODMG API of OJB.
I noticed that, if I read an object from the database, then modify a property
that is declared as a primary key (in the mapping) and save the object to the
database, a new row is created as if it was a new object inserted.
Is there a way to modify an object's primary key without having to delete it
from the database before ?
follows a sample code.
-----------------------------------
<class-descriptor
class="year"
table="numord"
>
<field-descriptor
name="year"
column="annee"
primarykey="true"
/>
</class-descriptor>
public class year {
private int year;
public int getYear() {
return year;
}
public void setYear(int year) {
this.year = year;
}
}
public class test {
public static void main(String[] args) {
year y = new year();
try {
Implementation impl = OdmgSingleton.odmg;
//OdmgSingleton is a static class of mine.
Transaction t = impl.newTransaction();
t.begin();
org.odmg.OQLQuery query = impl.newOQLQuery();
query.create("select p from year");
DList results = (DList)query.execute();
y = (year)results.iterator().next();
t.lock(y,Transaction.WRITE);
y.setYear(2004);
t.commit();
} catch (Exception e) {
e.printStackTrace();
}
}
}
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