I'm sorry to report that we have not yet hooked in support for ObjectStringConverter. It shouldn't be too difficult though and I can definitely see how it would be useful. Please file an issue and we'll get to it as soon as we can.
http://code.google.com/p/datanucleus-appengine/issues/list Thanks, Max On Fri, Jan 8, 2010 at 3:47 PM, inetdevboy <inetdev...@gmail.com> wrote: > I wrote a datanucleus javaTypes plugin (for joda-time LocalDate) based > on the org.datanuclues.store.types.ObjectStringConverter interface. > You probably know that this interface allows non-basic types to > declare their ability to marshal themselves to/from a String > representation for persistence. In my case it'd be particularly > helpful because the String representation's natural sort order matches > the sort order of the class itself, so it'd be indexable. > > The datanucleus layer seems to find and register the plugin, because I > get this FINE debug line when I include my plugin: > > Jan 8, 2010 8:47:42 PM org.datanucleus.store.types.TypeManager > addJavaType > FINE: Adding support for Java type org.joda.time.LocalDate > (persistent=true, DFG=true, embedded=true) > > But when it tries to persist a field of type LocalDate I still get the > following stack, with or without my plugin: > > java.lang.IllegalArgumentException: eventDate: org.joda.time.LocalDate > is not a supported property type. > at > com.google.appengine.api.datastore.DataTypeUtils.checkSupportedSingleValue > (DataTypeUtils.java:145) > at > com.google.appengine.api.datastore.DataTypeUtils.checkSupportedValue > (DataTypeUtils.java:127) > at > com.google.appengine.api.datastore.Entity.setProperty(Entity.java: > 280) > at > org.datanucleus.store.appengine.DatastoreFieldManager.storeObjectField > (DatastoreFieldManager.java:798) > at org.datanucleus.state.AbstractStateManager.providedObjectField > (AbstractStateManager.java:1037) > at com.inetdevboy.model.Event.jdoProvideField(Event.java) > at com.inetdevboy.model.Event.jdoProvideFields(Event.java) > [more]... > > I'd really like to avoid having to declare separate persistence fields > with lifecycle listeners to accommodate every LocalDate field. Is > there a lever in the existing GAE implementation I haven't pulled to > engage my plugin? > > BTW, I'm aware that there's an existing JodaTime datanucleus plugin, > but it appears to require DataNucleus 2, and my implementation is > essentially the same as theirs, just without the ORM support. > > Please help! > > [Using GAE SDK 1.3.0] > > -- > You received this message because you are subscribed to the Google Groups > "Google App Engine for Java" group. > To post to this group, send email to > google-appengine-j...@googlegroups.com. > To unsubscribe from this group, send email to > google-appengine-java+unsubscr...@googlegroups.com<google-appengine-java%2bunsubscr...@googlegroups.com> > . > For more options, visit this group at > http://groups.google.com/group/google-appengine-java?hl=en. > > > >--
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