Hibernate.groovy


import ?org.hibernate.cfg.Configuration
 import ?org.hibernate.Session
 import ?org.hibernate.SessionFactory
 import ?org.hibernate.Transaction
 import ?org.hibernate.tool.hbm2ddl.SchemaUpdate

 class ?Hibernate?{
????def? static ?sessionFactory
??? static ?{?
??????? try ?{?
??????????? Configuration?cfg? = ? new ?Configuration()
??????????? cfg.configure()????????????
??????????? new ?SchemaUpdate(cfg).execute( true ,? true )??????
??????????? sessionFactory? = ?cfg.buildSessionFactory()????
??????? }? catch ?(Exception?e)?{?????
??????????? e.printStackTrace()??????
??????? }????
??? }????

????Hibernate()?{}???

???? private ?Session?getSession()?{????
???????? return ?sessionFactory.openSession()????
????}????

????Object?execute(closure)?{???????
????????def?s? = ?getSession()????????
????????????def?tr? = ? null ????????
????????????def?result? = ? null ????????
???????????? try ?{????????????
????????????????tr? = ?s.beginTransaction()??????????
????????????????????result? = ?closure.call(s)???????
????????????????????tr.commit()??????
????????????}? catch ?(Exception?e)?{?????
????????????????e.printStackTrace()??????
???????????????????? if ?(tr? != ? null )?{?????
????????????????????????tr.rollback()????
????????????????????}????????
????????????}? finally ?{?????
????????????????s.close()???
????????????}????????
???????? return ?result???
????}????

???? void ?saveOrUpdate(obj)?{
????????def?saveClosure? = ?{?s? -> ?s.saveOrUpdate(obj)?}??????
????????execute(saveClosure)????
????}????

????List?executeQuery(hql)?{?????
????????execute({?s? -> ?s.createQuery(hql).list()?})???
????}????

????List?executeQuery(hql,?parameters)?{????
????????def?query? = ?{?s? -> ????????
????????????def?q? = ?s.createQuery(hql)????????
???????????????? if ?(parameters? != ? null )?{?????????
???????????????????? for ?(i?in? 0 ..parameters.size() - 1 )?{???????
????????????????????????q.setParameter(i,?parameters[i])???????
????????????????????}????????????
????????????????}????????????
????????????q.list()???????
????????}????????
????????execute(query)????
????}????

????def?get(clazz,?id)?{????
???????? return ?execute({?s? -> ?s.get(clazz,?id)?})???
????}????

???? void ?delete(obj)?{???????
????????execute({?s? -> ?s.delete(obj)?})???
????}
}

Instead of interface, I use Closure for callback

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