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Hibernate version: 3.2

Mapping documents: persistence.xml

<persistence xmlns="http://java.sun.com/xml/ns/persistence"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/persistence
http://java.sun.com/xml/ns/persistence/ ... ce_1_0.xsd"
version="1.0">
<persistence-unit name="mater_persistence">
</persistence-unit>
</persistence>

Code to persist object:

Map<String,String> myProperties = new HashMap<String,String>();
myProperties.put("hibernate.hbm2ddl.auto", "create-drop");
myProperties.put("hibernate.archive.autodetection" , "class");
myProperties.put("hibernate.connection.driver_class" , "org.gjt.mm.mysql.Driver");
myProperties.put("hibernate.connection.password" , "");
myProperties.put("hibernate.connection.url" , "jdbc:mysql://localhost");
myProperties.put("hibernate.connection.username" , "ruya");
myProperties.put("hibernate.default_schema" , "mater");
myProperties.put("hibernate.dialect" , "org.hibernate.dialect.MySQLDialect");
EntityManagerFactory emf =
Persistence.createEntityManagerFactory("mater_persistence", myProperties );
// First unit of work
EntityManager em = emf.createEntityManager();
EntityTransaction tx = em.getTransaction();
tx.begin();

em.persist(model);

tx.commit();
em.close();

Full stack trace of any exception that occurs:

Exception in thread "main" java.lang.IllegalAccessError
at net.sf.cglib.core.ClassEmitter.setTarget(ClassEmitter.java:45)
at net.sf.cglib.core.ClassEmitter.<init>(ClassEmitter.java:37)
at net.sf.cglib.core.KeyFactory$Generator.generateClass(KeyFactory.java:165)
at net.sf.cglib.core.DefaultGeneratorStrategy.generate(DefaultGeneratorStrategy.java:25)
at net.sf.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:216)
at net.sf.cglib.core.KeyFactory$Generator.create(KeyFactory.java:145)
at net.sf.cglib.core.KeyFactory.create(KeyFactory.java:117)
at net.sf.cglib.core.KeyFactory.create(KeyFactory.java:108)
at net.sf.cglib.core.KeyFactory.create(KeyFactory.java:104)
at net.sf.cglib.proxy.Enhancer.<clinit>(Enhancer.java:69)
at org.hibernate.proxy.pojo.cglib.CGLIBLazyInitializer.getProxyFactory(CGLIBLazyInitializer.java:107)
at org.hibernate.proxy.pojo.cglib.CGLIBProxyFactory.postInstantiate(CGLIBProxyFactory.java:43)
at org.hibernate.tuple.entity.PojoEntityTuplizer.buildProxyFactory(PojoEntityTuplizer.java:162)
at org.hibernate.tuple.entity.AbstractEntityTuplizer.<init>(AbstractEntityTuplizer.java:135)
at org.hibernate.tuple.entity.PojoEntityTuplizer.<init>(PojoEntityTuplizer.java:55)
at org.hibernate.tuple.entity.EntityEntityModeToTuplizerMapping.<init>(EntityEntityModeToTuplizerMapping.java:56)
at org.hibernate.tuple.entity.EntityMetamodel.<init>(EntityMetamodel.java:295)
at org.hibernate.persister.entity.AbstractEntityPersister.<init>(AbstractEntityPersister.java:434)
at org.hibernate.persister.entity.SingleTableEntityPersister.<init>(SingleTableEntityPersister.java:109)
at org.hibernate.persister.PersisterFactory.createClassPersister(PersisterFactory.java:55)
at org.hibernate.impl.SessionFactoryImpl.<init>(SessionFactoryImpl.java:226)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1294)
at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:713)
at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:121)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:51)


Name and version of the database you are using: MySQL 5.0

Hi,
I posted this problem yesterday and nobody answered (yet, I hope).
Can someone point me a way to found a solution or, at least, to get to the root of the problem?

Thanks,
Rui

I have done it again, this time using the persistence.xml file instead of doing it programmatically.
The persistence fie:
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/persistence
http://java.sun.com/xml/ns/persistence/ ... ce_1_0.xsd"
version="1.0">

<persistence-unit name="mater_persistence">
<!--
<provider value="org.hibernate.ejb.HibernatePersistence"/>
-->

<properties>
<!-- Scan for annotated classes and Hibernate mapping XML files -->
<property name="hibernate.archive.autodetection" value="class, hbm"/>

<!-- SQL stdout logging
<property name="hibernate.show_sql" value="true"/>
<property name="hibernate.format_sql" value="true"/>
<property name="use_sql_comments" value="true"/>
-->

<property name="hibernate.connection.driver_class" value="org.gjt.mm.mysql.Driver"/>
<property name="hibernate.connection.password" value=""/>
<property name="hibernate.connection.url" value="jdbc:mysql://localhost"/>
<property name="hibernate.connection.username" value="ruya"/>
<property name="hibernate.default_schema" value="mater"/>
<property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect"/>
<property name="hibernate.hbm2ddl.auto" value="create-drop"/>
</properties>
</persistence-unit>
</persistence>


Code to persiste object:
1. EntityManagerFactory emf = Persistence.createEntityManagerFactory("mater_persistence" );
2. EntityManager em = emf.createEntityManager();
3. EntityTransaction tx = em.getTransaction();
4. tx.begin();
5. em.persist(model);
6. tx.commit();
7. em.close();


The hibernate info output:
15:05:06,478 INFO Version:148 - Hibernate EntityManager 3.2.1.GA
15:05:06,499 INFO Version:148 - Hibernate Annotations 3.2.1.GA
15:05:06,615 INFO Environment:148 - Hibernate 3.2.2
15:05:06,619 INFO Environment:148 - hibernate.properties not found
15:05:06,622 INFO Environment:148 - Bytecode provider name : cglib
15:05:06,627 INFO Environment:148 - using JDK 1.4 java.sql.Timestamp handling
15:05:07,514 INFO AnnotationBinder:148 - Binding entity from annotated class: mater.MaterModel
15:05:07,555 INFO EntityBinder:148 - Bind entity mater.MaterModel on table MaterModel
15:05:07,751 INFO DriverManagerConnectionProvider:148 - Using Hibernate built-in connection pool (not for production use!)
15:05:07,751 INFO DriverManagerConnectionProvider:148 - Hibernate connection pool size: 20
15:05:07,752 INFO DriverManagerConnectionProvider:148 - autocommit mode: true
15:05:07,762 INFO DriverManagerConnectionProvider:148 - using driver: org.gjt.mm.mysql.Driver at URL: jdbc:mysql://localhost
15:05:07,762 INFO DriverManagerConnectionProvider:148 - connection properties: {user=ruya, password=****, autocommit=true, release_mode=auto}
15:05:08,014 INFO SettingsFactory:148 - RDBMS: MySQL, version: 5.0.24a-Debian_9-log
15:05:08,015 INFO SettingsFactory:148 - JDBC driver: MySQL-AB JDBC Driver, version: mysql-connector-java-5.0.5 ( $Date: 2007-03-01 00:01:06 +0100 (Thu, 01 Mar 2007) $, $Revision: 6329 $ )
15:05:08,031 INFO Dialect:148 - Using dialect: org.hibernate.dialect.MySQLDialect
15:05:08,036 INFO TransactionFactoryFactory:148 - Transaction strategy: org.hibernate.transaction.JDBCTransactionFactory
15:05:08,038 INFO TransactionManagerLookupFactory:148 - No TransactionManagerLookup configured (in JTA environment, use of read-write or transactional second-level cache is not recommended)
15:05:08,038 INFO SettingsFactory:148 - Automatic flush during beforeCompletion(): disabled
15:05:08,039 INFO SettingsFactory:148 - Automatic session close at end of transaction: disabled
15:05:08,039 INFO SettingsFactory:148 - JDBC batch size: 15
15:05:08,039 INFO SettingsFactory:148 - JDBC batch updates for versioned data: disabled
15:05:08,041 INFO SettingsFactory:148 - Scrollable result sets: enabled
15:05:08,042 INFO SettingsFactory:148 - JDBC3 getGeneratedKeys(): enabled
15:05:08,042 INFO SettingsFactory:148 - Connection release mode: auto
15:05:08,043 INFO SettingsFactory:148 - Default schema: mater
15:05:08,043 INFO SettingsFactory:148 - Maximum outer join fetch depth: 2
15:05:08,044 INFO SettingsFactory:148 - Default batch fetch size: 1
15:05:08,044 INFO SettingsFactory:148 - Generate SQL with comments: disabled
15:05:08,044 INFO SettingsFactory:148 - Order SQL updates by primary key: disabled
15:05:08,045 INFO SettingsFactory:148 - Query translator: org.hibernate.hql.ast.ASTQueryTranslatorFactory
15:05:08,047 INFO ASTQueryTranslatorFactory:148 - Using ASTQueryTranslatorFactory
15:05:08,048 INFO SettingsFactory:148 - Query language substitutions: {}
15:05:08,048 INFO SettingsFactory:148 - JPA-QL strict compliance: enabled
15:05:08,049 INFO SettingsFactory:148 - Second-level cache: enabled
15:05:08,049 INFO SettingsFactory:148 - Query cache: disabled
15:05:08,049 INFO SettingsFactory:148 - Cache provider: org.hibernate.cache.NoCacheProvider
15:05:08,050 INFO SettingsFactory:148 - Optimize cache for minimal puts: disabled
15:05:08,050 INFO SettingsFactory:148 - Structured second-level cache entries: disabled
15:05:08,055 INFO SettingsFactory:148 - Statistics: disabled
15:05:08,056 INFO SettingsFactory:148 - Deleted entity synthetic identifier rollback: disabled
15:05:08,057 INFO SettingsFactory:148 - Default entity-mode: pojo
15:05:08,057 INFO SettingsFactory:148 - Named query checking : enabled
15:05:08,114 INFO SessionFactoryImpl:148 - building session factory
Exception in thread "main" java.lang.IllegalAccessError (at line 1 )

Can someone help me? I don't understand the reasons for the exception...

Thanks,
Rui

it's usually due to:
- not enough JVM privileges
- or more frequently a wrongly formed getter (wrong type, wrong signature)

Hi,

Thanks. Now, if I have only one class with the

@Id
Long id;

(...)
Long getId();
void setId(Long);
(...)

and all other fields annotated with @Transient, then it sure is a question of jvm priveleges, right?

Thanks,
Rui

sounds like, ah be sure to have a no arg constructor (package level or above) and no final class nor final methods

Hi,

I didn't understand what you meant by package level or above constructor but the class I want to persist has a default constructor. I don't have final classes nor final methods. I do have, although, nested classes and final fields, yet marked with @Transient. It is something like this:




Is this ok? Do I need to explicitly exclude the nested classes?

Thanks,
Rui[

What type of permissions are we talking about?
I tried to set a SecurityManager to my application using a policy file which grants AllPermission, but this way hibernate couldn't find the persistence provider.
By default java applications don't have a security manager because usually it is not needed. Shouldn't this be ok for hibernate?

Rui

try and remove the final

I removed the final field but it has the same exception building the session factory.

Rui