One other detail I should have mentioned. The values are correctly retrieved
from the database, but the exception is thrown on INSERT before the @Strategy
class is even invoked.
On Mar 8, 2010, at 12:42 PM, No1UNo [via OpenJPA] wrote:
> I am seeing an 'unmanaged object' exception for the objects build using
> @Strategy, but isn't that exactly the point? These are supposed to be
> unmanaged with the strategy being invoked as necessary for conversion. I
> must be missing something obvious. ;-)
>
> > Caused by: <openjpa-2.0.0-beta2-r422266:915978 fatal user error>
> > org.apache.openjpa.persistence.InvalidStateException: Encountered unmanaged
> > object in persistent field "com.example.SimpleEntity.custom" during flush.
> > However, this field does not allow cascade persist. Set the cascade
> > attribute for this field to CascadeType.PERSIST or CascadeType.ALL (JPA
> > annotations) or "persist" or "all" (JPA orm.xml), or enable cascade-persist
> > globally, or manually persist the related field value prior to flushing.
> > You cannot flush unmanaged objects or graphs that have persistent
> > associations to unmanaged objects.
> > FailedObject: com.example.mypo...@a431693
> > at
> > org.apache.openjpa.kernel.SingleFieldManager.preFlushPC(SingleFieldManager.java:767)
> >
>
> My entity looks something like this:
>
> > @Entity
> > public abstract class SimpleEntity {
> > @Id
> > private long id;
> > public long getId() { return id; }
> > public void setId(long id) { this.id = id; }
> >
> > @Strategy("MyPointHandler")
> > private MyPoint custom;
> > MyPoint getCustom() { return custom; }
> > void setCustom(MyPoint custom) { this. custom = custom; }
> >
> > ...
> > }
>
> With a very simple handler class:
>
> > public class MyPointHandler extends AbstractValueHandler {
> > @Override
> > public Column[] map(ValueMapping vm, String name, ColumnIO io, boolean
> > adapt) {
> > Column c = new Column();
> > c.setIdentifier(DBIdentifier.newColumn(name));
> > c.setJavaType(JavaTypes.STRING);
> > return new Column[]{ c };
> > }
> >
> > public boolean isVersionable() {
> > return true;
> > }
> >
> > public Object toDataStoreValue(ValueMapping vm, Object val, JDBCStore
> > store) {
> > return new MyPoint((String) val);
> > }
> >
> > public Object toObjectValue(ValueMapping vm, Object val) {
> > if (val == null) return null;
> > return ((MyPoint) val).getValue();
> > }
> > }
>
> I've used the PointHandler from the OpenJPA tests as a model.
>
>
>
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