Hi All,
I'm very new to hibernate and am using annotations for about a week now,
but i believe i stumbled upon some strange behaviour.
If i'm totally out of line and in the wrong place for my findings,
please tell me and I won't cause any more spam on this list :)
I've got a property annotated as follows:
@Generated(GenerationTime.INSERT)
@Column(insertable=false)
Now reading the documentation, i was let to believe this property should
show up in the sqlUpdateStrings, but it didn't.
So, looking at the internal hibernate-annotations code i saw this code
in PropertyBinder.make(): (It's hibernate-annotations-3.2.0cr1)
if (generated != null) {
if ( ! GenerationTime.NEVER.equals( generated ) ) {
if ( property.isAnnotationPresent(
javax.persistence.Version.class )
&& GenerationTime.INSERT.equals( generated ) ) {
throw new AnnotationException("@Generated(INSERT) on
a @Version property not allowed, use ALWAYS: "
+ StringHelper.qualify( holder.getPath(),
name ) );
}
if ( prop.isInsertable() ) {
throw new AnnotationException("Cannot have
@Generated property and insertable columns: "
+ StringHelper.qualify( holder.getPath(),
name ) );
}
if ( GenerationTime.ALWAYS.equals( generated ) &&
prop.isUpdateable() ) {
throw new AnnotationException("Cannot have
@Generated(ALWAYS) property and updatable columns: "
+ StringHelper.qualify( holder.getPath(),
name ) );
}
prop.setInsertable( false );
prop.setUpdateable( false );
prop.setGeneration( PropertyGeneration.parse(
generated.toString().toLowerCase() ) );
}
}
now, why are the calls to prop.setInsertable( false ) and
prop.setUpdateable( false ) happening? It seems rather strange since
they are checked before to see whether or not they are in conflict with
the set GenerationTime, but then are overruled, so that the property
will be neither insertable nor updateable. By commenting out these
calls, the expected behaviour took placed (at least, expected by me) in
that the property showed up in the update string, but not in the insert
string. Also the other properties which had GenerationTime.ALWAYS (and
corresponding column settings) did not show up in neither the insert nor
the update string.
So am I right in the conclusion that these calls shouldn't be made (and
therefor posting to this list was A Good Thing;)?
cheers,
Willem Voogd
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