Hello,
this is my shorter solution:
String tableName =
context.getEntityResolver().getObjEntity(item.getClass().getSimpleName()).getDbEntityName();
Thanks for the tip Andrey.
2008/7/23 Andrey Razumovsky <[EMAIL PROTECTED]>:
> Seems that you're looking just for a name of DB table, to clean it before
> insert? If so, why cannot you use
> context.getEntityResolver().getObjEntity(String) method? I don't see why
> you
> need that dummyContext in that case
>
> 2008/7/23, Borut Bolčina <[EMAIL PROTECTED]>:
> >
> > Hello,
> >
> > is there a better solution to creating a dummyDataContext just to get
> > dbEntityName and then unregistering all objects:
> >
> > DataContext context = DataContext.createDataContext();
> > // item is TRANSIENT
> > CayenneDataObject item = (CayenneDataObject)
> > allItemsFromOneProvider.iterator().next();
> > // so create a dummy data context
> > DataContext dummyContext = DataContext.createDataContext();
> > dummyContext.registerNewObject(item);
> > // just to find out table name
> > logger.debug("item.getObjEntity().getDbEntityName(): " +
> > item.getObjEntity().getDbEntityName());
> > String tableName = item.getObjEntity().getDbEntityName();
> > // now unregister item
> > dummyContext.unregisterObjects(allItemsFromOneProvider);
> >
> > context.performGenericQuery(new NamedQuery("DeleteAll",
> > Collections.singletonMap("table", tableName)));
> >
> > // now do a clean insert
> > logger.info("Persisting...");
> > for (Iterator i = allItemsFromOneProvider.iterator();
> > i.hasNext();) {
> > item = (CayenneDataObject) i.next();
> >
> > context.registerNewObject(item);
> > }
> > context.commitChanges();
> >
> > Regards,
> >
> > Borut
> >
>
