[hibernate-issues] [Hibernate-JIRA] Created: (HHH-6590) Allow for exclusion of persisted classes by package in metamodel
Allow for exclusion of persisted classes by package in metamodel
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Key: HHH-6590
URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-6590
Project: Hibernate Core
Issue Type: Improvement
Components: entity-manager
Affects Versions: 3.5.5
Environment: Hibernate 3.5.5, PostgreSQL 8.4
Reporter: Robert Brady
This improvement would work around the need for "any" mapping support as given
in HHH-6589.
I am upgrading from Hibernate 3.2.x to 3.5.5 and getting UnsupportedOperationExceptions
thrown when Hibernate is trying to create the metamodel. This is due to the dependency of
my application upon jBPM 3.x, which uses "any" mappings for some of its
classes.
If Hibernate can not support "any" mappings then it could workaround this
limitation by allowing for the exclusion of persistent classes by package name. For
example, in my application I have no need for the metamodel to include the jBPM classes
(don't need criteria api to be applied to them). These classes contain
"any" mappings that break the generation of the metamodel. The metamodel
boundaries could be cleanly set if all the jBPM classes (packages org.jbpm.*) were
excluded from the generation of the metamodel. This could be done like so in
org.hibernate.ejb.EntityManagerFactoryImpl constructor:
{noFormat}
...
List<PersistentClass> persistentClasses = new ArrayList<PersistentClass>();
while (classes.hasNext()) {
PersistentClass persistentClass = classes.next();
// Hardcode jBPM classes for now, but make tidy with a property like
"hibernate.ejb.metamodel.excluded.pkgs"
if (persistentClass.getClassName().startsWith("org.jbpm")) {
continue;
} else {
persistentClasses.add(persistentClass);
}
}
// a safe guard till we are confident that metamodel is wll tested
if
(!"disabled".equalsIgnoreCase(cfg.getProperty("hibernate.ejb.metamodel.generation")))
{
this.metamodel = MetamodelImpl.buildMetamodel(persistentClasses.iterator(),
(SessionFactoryImplementor) sessionFactory);}
...
{noFormat}
A configuration list property with items being the package root names to exclude should
work.
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