Hi,

I have a general question about a difference between hibernate version 2.1.7-c and version 3.0.

We have used entities with private default constructors without any problems in Hibernate 2.1.7-c. These default constructors are declared private to make sure they can be used exclusively for OR mapping and not by application code.

Nevertheless, these same entities are now resulting in exceptions thrown by CGLIB (see at the end of this post) with the new hibernate version 3.

These exceptions do not cause any testcases to fail, but they are still annoying. I managed to get rid of the exceptions by declaring the constructors protected instead of private.

Has anything changed in the default configuration of CGLIB or Hibernate causing this behavior? Is it possible to configure Hibernate and CGLIB to get the old behavior back?

Cheers
Erik


[junit] 24527 [main] ERROR org.hibernate.proxy.BasicLazyInitializer - CGLIB Enhancement failed: com.upsscs.dragon.system.scheduling.DefaultSchedulingInfo
[junit] java.lang.IllegalArgumentException: Superclass has no null constructors but no arguments were given
[junit] at net.sf.cglib.proxy.Enhancer.emitConstructors(Enhancer.java:682)
[junit] at net.sf.cglib.proxy.Enhancer.generateClass(Enhancer.java:494)
[junit] at net.sf.cglib.core.DefaultGeneratorStrategy.generate(DefaultGeneratorStrategy.java:25)
[junit] at net.sf.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:215)
[junit] at net.sf.cglib.proxy.Enhancer.createHelper(Enhancer.java:373)
[junit] at net.sf.cglib.proxy.Enhancer.create(Enhancer.java:281)
[junit] at net.sf.cglib.proxy.Enhancer.create(Enhancer.java:640)
[junit] at org.hibernate.proxy.CGLIBLazyInitializer.getProxyFactory(CGLIBLazyInitializer.java:94)
[junit] at org.hibernate.proxy.CGLIBProxyFactory.postInstantiate(CGLIBProxyFactory.java:42)
[junit] at org.hibernate.tuple.PojoTuplizer.buildProxyFactory(PojoTuplizer.java:139)
[junit] at org.hibernate.tuple.AbstractTuplizer.<init>(AbstractTuplizer.java:83)
[junit] at org.hibernate.tuple.PojoTuplizer.<init>(PojoTuplizer.java:54)
[junit] at org.hibernate.tuple.TuplizerLookup.create(TuplizerLookup.java:47)
[junit] at org.hibernate.tuple.EntityMetamodel.<init>(EntityMetamodel.java:212)
[junit] at org.hibernate.persister.entity.BasicEntityPersister.<init>(BasicEntityPersister.java:400)
[junit] at org.hibernate.persister.entity.SingleTableEntityPersister.<init>(SingleTableEntityPersister.java:104)
[junit] at org.hibernate.persister.PersisterFactory.createClassPersister(PersisterFactory.java:55)
[junit] at org.hibernate.impl.SessionFactoryImpl.<init>(SessionFactoryImpl.java:199)
[junit] at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1054)
[junit] at org.springframework.orm.hibernate3.LocalSessionFactoryBean.newSessionFactory(LocalSessionFactoryBean.java:568)
[junit] at org.springframework.orm.hibernate3.LocalSessionFactoryBean.afterPropertiesSet(LocalSessionFactoryBean.java:503)
[junit] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1075)
[junit] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:349)
[junit] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:257)
[junit] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:222)
[junit] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:146)
[junit] at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:285)
[junit] at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:317)
[junit] at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:80)
[junit] at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:65)
[junit] at com.upsscs.dragon.persistence.test.ORMappingTestCase.setUp(Unknown Source)
[junit] at com.upsscs.dragon.persistence.hibernate.scheduling.SchedulingInfoPersistenceTest.setUp(Unknown Source)
[junit] at junit.framework.TestCase.runBare(TestCase.java:125)
[junit] at junit.framework.TestResult$1.protect(TestResult.java:106)
[junit] at junit.framework.TestResult.runProtected(TestResult.java:124)
[junit] at junit.framework.TestResult.run(TestResult.java:109)
[junit] at junit.framework.TestCase.run(TestCase.java:118)
[junit] at junit.framework.TestSuite.runTest(TestSuite.java:208)
[junit] at junit.framework.TestSuite.run(TestSuite.java:203)
[junit] at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.run(JUnitTestRunner.java:289)
[junit] at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.launch(JUnitTestRunner.java:656)
[junit] at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.main(JUnitTestRunner.java:558)