org.hibernate.MappingException: Unknown entity: main.java...

drindt · **Joined:** Tue Jul 20, 2010 3:56 am **Posts:** 6

Hello Forum,

started a new hibernate project, it should use just the annotated classes. My initial test code looks like:

Code:

package main.java.de.vaod.dao;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;

@Entity
public class User {
    private Long id;

    @Id
    @GeneratedValue
    public Long getId() {
   return id;
    }

    public void setId(Long id) {
   this.id = id;
    }
}

the test:

Code:

package test.java.de.vaod.backend;

import junit.framework.TestCase;

import main.java.de.vaod.dao.User;

import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.AnnotationConfiguration;
import org.hibernate.classic.Session;

public class UserTest extends TestCase {

    public void testSave() {
   SessionFactory sessionFactory = new AnnotationConfiguration()
      .configure().buildSessionFactory();
   Session session = sessionFactory.openSession();
   Transaction transaction = session.beginTransaction();

   User user = new User();
   session.save(user);

   transaction.commit();
   session.close();
   sessionFactory.close();

   assertNotNull(user.getId());
    }
}

The MappingException happen in the test in the Line new User(); the trace told me:

Code:

org.hibernate.MappingException: Unknown entity: main.java.de.vaod.dao.User
   at org.hibernate.impl.SessionFactoryImpl.getEntityPersister(SessionFactoryImpl.java:706)
   at org.hibernate.impl.SessionImpl.getEntityPersister(SessionImpl.java:1475)
   at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:121)
   at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:210)
   at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:56)
   at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:195)
   at org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:50)
   at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:93)
   at org.hibernate.impl.SessionImpl.fireSave(SessionImpl.java:705)
   at org.hibernate.impl.SessionImpl.save(SessionImpl.java:693)
   at org.hibernate.impl.SessionImpl.save(SessionImpl.java:689)
   at test.java.de.vaod.backend.UserTest.testSave(UserTest.java:25)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
   at java.lang.reflect.Method.invoke(Method.java:616)
   at junit.framework.TestCase.runTest(TestCase.java:164)
   at junit.framework.TestCase.runBare(TestCase.java:130)
   at junit.framework.TestResult$1.protect(TestResult.java:106)
   at junit.framework.TestResult.runProtected(TestResult.java:124)
   at junit.framework.TestResult.run(TestResult.java:109)
   at junit.framework.TestCase.run(TestCase.java:120)
   at junit.framework.TestSuite.runTest(TestSuite.java:230)
   at junit.framework.TestSuite.run(TestSuite.java:225)
   at org.eclipse.jdt.internal.junit.runner.junit3.JUnit3TestReference.run(JUnit3TestReference.java:130)
   at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
   at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
   at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
   at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
   at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)

I dont know what iam doing wrong. Any help will be very appreciated.

Daniel

shynate26 · **Posted:** Mon Aug 09, 2010 3:39 am

Hello Daniel,

In your annotated class, you havent mentioned the table . To which table this POJO is mapped?

Check that once.

drindt · **Joined:** Tue Jul 20, 2010 3:56 am **Posts:** 6

Thank you for your message, the documentation told me that

Code:

...
@Entity
@Table
public class User {
...

is sufficent, the table name is then the same like the classname (User). But problem persist. Perhaps the book iam reading about is to old...
Please give me an example so that i can understand what you mean. Thanks

Daniel

shynate26 · **Posted:** Mon Aug 09, 2010 5:32 am

In the cfg.xml file, please check once whether you have mapped this annotated class.

drindt · **Joined:** Tue Jul 20, 2010 3:56 am **Posts:** 6

i created a hibernate.cfg.xml only, that contains:

Code:

<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
  "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
  "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
   <session-factory>
      <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
      <property name="hibernate.connection.url">jdbc:mysql://localhost/vaod</property>
      <property name="hibernate.connection.username">vaod</property>
      <property name="hibernate.connection.password"></property>
      <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
      <property name="hibernate.cache.provider_class">org.hibernate.cache.NoCacheProvider</property>
      <property name="hibernate.show_sql">true</property>
      <property name="hibernate.format_sql">true</property>
      <property name="hibernate.hbm2ddl.auto">update</property>
   </session-factory>
</hibernate-configuration>

I thought was thats not required to create a mapping file because iam use annotations. I become not clued with the annotations stuff, i don't want use xml a lot. Thanks for supporting me again.

shynate26 · **Posted:** Mon Aug 09, 2010 6:17 am

Hi Drindt,

Please go through this link. I have a feeling that some thing went wrong in configuration.

http://docs.jboss.org/hibernate/stable/ ... /ch01.html

thanks.

Sensel · **Joined:** Wed Sep 29, 2010 12:28 am **Posts:** 3

Hi

I am new to Hibernate. I am using Hibernate 3.3.1 with Jboss 5.

I copied hibernate configuration file and mapping file into ../server/sample/conf directory. And classes files located at ../server/sample/deploy/sample.war/WEB-INF/classes directory.

I am getting same exception(org.hibernate.MappingException: Unknown entity:) when i calling Hibernate from my application. Please help me to resolve this issue.

I tried to copy the mapping file to class file location, but no help.

Hibernate configuration file

Code:

<?xml version='1.0' encoding='utf-8'?>
<hibernate-configuration>
  <session-factory>
    <property name=“connection.datasource">java:sampleDB</property>
    <property name="connection.autocommit">false</property>
    <property name="dialect">org.hibernate.dialect.SQLServerDialect</property>
    <property name="show_sql">false</property>
    <property name="jdbc_use_streais_fbr_binary'>true</property>
    <property name="max_fetch_depth">3</property>
    <property name="cache.use_second_level_cache">False</property>
    <property name="transaction.factory_class">org.hibernate.transaction.JTATransactionFactory</property>
    <!-- Mapping files -->
    <mapping resource=“sampleLookupGenericData.hbm.xml"/>
  <session-factory>
</hibernate-configuration>

My hibernate mapping file

Code:

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
  <sql-query name="sampleloopup">
    <return alias="generic" class="com.test.sample.portal.data.SampleLookupGenericData“></return>
        SELECT PROJ_NAME as generic.lookUpDescriptionkesult test_Sample_PROJECT
        where PROJ_ID = ?
  </sql-query>
</hibernate-mapping>

Log details

Code:

[ReguestListenerlnterface] registered Tistener interface
[RequestListenerInter ace name=INewBrowserwindoNListener, method=public abstract
apache.wicket.markup.html.INewBrowserwindowListener.onNewBrowserwindow()]
[STDOUT] **** Input value was *******sample
[STDOUT] Query Name has to execute ~->sampleloopup
[Environment] Hibernate 3.3.1.GA
[Environment] hibernate.properties not found
[Environment] Bytecode provider name : javassist
[Environment] using JDK 1.4 ;ava.sql.Timestamp handling
[Confiuration] configuring from resource:hibernate-sampledb.cfg.xml
INFO [Configuration] Configuration resource: hibernate-sampledb.cfg.xml
[Confi uration] Reading mappings from resource : SampleLookupGenericData.hgm.xml
[configuration] Configured SessionFactory: null
[NamingHelper] JNDI InitialContext properties:{}
[batasourceconnectionProviderl Using datasource: java:sampleDB
[SettingsFactory] RDBMS: Microsoft SQL server, version: 9.00.4305
[SettingsFactory] JDBC driver: Microsoft SQL Server JDBC Driver
[Dialect]_Using dialect: org.hibernate.dialect.SQLServerDialect
[TransactionFactoryFactory] Transaction strategy:
org.hibernate.transaction.JTATransactionFactory
[NamingHelper] JNDI InitialContext properties:{}
[TransactionManagerLookupFactory] No TransactionManagerLookup
configured (in JTA environment, use of read-write or transactional second-level
cache is not recommended)
SettingSFactory] Automatic flush during beforeCompletion():disabled
[SettingsFactory] Automatic session close at end of transaction:
disabled
[SettingsFactory] Scrollable resuit sets: enabled
[SettingsFactory] JDBC3 getGeneratedKeys(): enabied
[SettingsFactory] Connection release mode: auto
[SettingsFactory] Maximum outer join fetch depth: 3
[SettingsFactory] Defauit batch fetch size: 1
[SettingsFactory] Generate SQL with comments: disabied
[SettingsFactory] Order SQL updates by primary key: disabied
[SettingsFactory] Order SQL inserts for batching: disabied
[SettingsFactory] Query translator:org.hibernate.hql.ast.ASTQueryTranslatorFactory
[ASTQueryTranslatorFactory] Using ASTQueryTranslatorFactory
[SettingsFactory] Query language substitutions: {}
[SettingsFactory] JPA-QL strict compiiancez disabied
[SettingsFactory] Second-leve cache: disabied
[SettingsFactory] Query cache: disabied
[SettingsFactory] Cache region factory :
org.hibernate.cache.impl.NoCachingRegionFactory
[SettingsFactory] Optimize cache for minimai puts: disabled
[SettingsFactory] Structured second-level cache entries: disabled
[SettingsFactory] Statistics: disabied
[SettingsFactory] Deleted entity synthetic identifier rollback:disabled
[SettingsFactory] Defauit entity-mode: pojo
[SettingsFactory] Named query checking : enabied
[SessionFactoryImpl] building session factory
[SessionFactoryObjectFactory] Not binding factory to JNDI, no JNDI name configured
SEVERE [SessionFactoryImpl] Error in named query: sampleloopup
org.hibernate.MappingException: Unknown entity: com.test.sample.portal.data.SampleLookupGenericData
at
org.hibernate.impl.SessionFactoryImpl.getEntityPersister(SessionFactoryImpl.java:580)

Thanks in Advance for your Help.