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rafamarquez
 Post subject: org.hibernate.MappingException: entity class not found
PostPosted: Fri Oct 01, 2010 7:09 am 
Newbie

Joined: Fri Oct 01, 2010 6:35 am
Posts: 2
Hi!

I'm getting started with Hibernate. I've coded a simple web application with struts, hibernate to Oracle DB.

Hibernate complete the class mapping successfuly, but a MappingException appears because the entity class is not found.

Here is the situation...

Class hierarchy:
[ src ]
+----[ hibernate ]
+--------- Epleado.java
+--------- Empleado.hbm.xml
+--- hibernate.cfg.xml


The Tomcat's log shows (see complete LOG after explanation):
...
149109 [2010-10-01 11:02:10,592] [http-8080-exec-9] - INFO org.hibernate.cfg.HbmBinder(bindRootPersistentClassCommonValues) - Mapping class: Empleado -> EMP
...

149188 [2010-10-01 11:02:10,671] [http-8080-exec-9] - ERROR hibernate.EmpleadoManager(<init>) - EmpleadoManager()
org.hibernate.MappingException: entity class not found: Empleado
...
Caused by: java.lang.ClassNotFoundException: Empleado
...

Mapping at hibernate.cfg.xml extract
Code:
<mapping resource="hibernate/Empleado.hbm.xml"/>


Mapping at Empleado.hbm.xml extract
Code:
<class name="Empleado" table="EMP" schema="SCOTT">


Searching around forums, i've found this solution: On Empleado.hbm.xml replace this line:
Code:
<class name="Empleado" table="EMP" schema="SCOTT">

with this other:
Code:
<class name="hibernate.Empleado" table="EMP" schema="SCOTT">

But, when i apply that solution, an error appears when hibernate try to do the mapping. So I supose the solution is not correct.

Any idea for solve the problem?

Thank you very much in advance !!!

Here you are the rest of the information...

Empleado.java:
Code:
package hibernate;

import java.math.BigDecimal;
import java.util.Date;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.Table;
import javax.persistence.Temporal;
import javax.persistence.TemporalType;

/**
* Empleado generated by hbm2java
*/
@Entity
@Table(name = "EMP", schema = "SCOTT")
public class Empleado implements java.io.Serializable {

/**
*
*/
private static final long serialVersionUID = 1L;
private short id;
private Departamento departamento;
private String nombre;
private String puesto;
private Short idManager;
private Date hireDate;
private BigDecimal salario;
private BigDecimal comision;

public Empleado() {
}

public Empleado(short id) {
this.id = id;
}

public Empleado(short id, Departamento departamento, String nombre,
String puesto, Short idManager, Date hireDate, BigDecimal salario,
BigDecimal comision) {
this.id = id;
this.departamento = departamento;
this.nombre = nombre;
this.puesto = puesto;
this.idManager = idManager;
this.hireDate = hireDate;
this.salario = salario;
this.comision = comision;
}

@Id
@Column(name = "EMPNO", unique = true, nullable = false, precision = 4, scale = 0)
public short getId() {
return this.id;
}

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

@ManyToOne(fetch = FetchType.LAZY)
@JoinColumn(name = "DEPTNO")
public Departamento getDepartamento() {
return this.departamento;
}

public void setDepartamento(Departamento departamento) {
this.departamento = departamento;
}

@Column(name = "ENAME", length = 10)
public String getNombre() {
return this.nombre;
}

public void setNombre(String nombre) {
this.nombre = nombre;
}

@Column(name = "JOB", length = 9)
public String getPuesto() {
return this.puesto;
}

public void setPuesto(String puesto) {
this.puesto = puesto;
}

@Column(name = "MGR", precision = 4, scale = 0)
public Short getIdManager() {
return this.idManager;
}

public void setIdManager(Short idManager) {
this.idManager = idManager;
}

@Temporal(TemporalType.DATE)
@Column(name = "HIREDATE", length = 7)
public Date getHireDate() {
return this.hireDate;
}

public void setHireDate(Date hireDate) {
this.hireDate = hireDate;
}

@Column(name = "SAL", precision = 7)
public BigDecimal getSalario() {
return this.salario;
}

public void setSalario(BigDecimal salario) {
this.salario = salario;
}

@Column(name = "COMM", precision = 7)
public BigDecimal getComision() {
return this.comision;
}

public void setComision(BigDecimal comision) {
this.comision = comision;
}

}




hibernate.cfg.xml
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 name=""> -->
<session-factory>
  <property name="hibernate.connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
  <property name="hibernate.connection.url">jdbc:oracle:thin:@localhost:1521:rafaoracledb</property>
 
  <property name="hibernate.connection.username">SCOTT</property>
  <property name="hibernate.connection.password">tiger</property>
 
  <property name="hibernate.connection.pool_size">1</property> <!-- extra -->
  <property name="show_sql">true</property>
  <property name="hibernate.dialect">org.hibernate.dialect.Oracle10gDialect</property>
 
  <!-- property name="mappingDirectoryLocations">classpath:WEB-INF/classes/hibernate</property-->
 
   <!-- Archivos de mapeo -->
   <mapping resource="hibernate/Empleado.hbm.xml"/>
   <mapping resource="hibernate/Departamento.hbm.xml"/>
   
</session-factory>
</hibernate-configuration>





Empleado.hbm.xml
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">
<!-- Generated 30-sep-2010 16:42:49 by Hibernate Tools 3.3.0.GA -->
<hibernate-mapping>
    <class name="Empleado" table="EMP" schema="SCOTT">
        <id name="id" type="short">
            <column name="EMPNO" precision="4" scale="0" />
            <generator class="assigned" />
        </id>
        <many-to-one name="departamento" class="Departamento" fetch="select">
            <column name="DEPTNO" precision="2" scale="0" />
        </many-to-one>
        <property name="nombre" type="string">
            <column name="ENAME" length="10" />
        </property>
        <property name="puesto" type="string">
            <column name="JOB" length="9" />
        </property>
        <property name="idManager" type="java.lang.Short">
            <column name="MGR" precision="4" scale="0" />
        </property>
        <property name="hireDate" type="date">
            <column name="HIREDATE" length="7" />
        </property>
        <property name="salario" type="big_decimal">
            <column name="SAL" precision="7" />
        </property>
        <property name="comision" type="big_decimal">
            <column name="COMM" precision="7" />
        </property>
    </class>
</hibernate-mapping>



Output LOG on Tomcat
Code:
149109 [2010-10-01 11:02:10,592] [http-8080-exec-9] - INFO org.hibernate.cfg.HbmBinder(bindRootPersistentClassCommonValues)  - Mapping class: Empleado -> EMP
149109 [2010-10-01 11:02:10,592] [http-8080-exec-9] - DEBUG org.hibernate.cfg.HbmBinder(bindProperty)  - Mapped property: id -> EMPNO
149109 [2010-10-01 11:02:10,592] [http-8080-exec-9] - DEBUG org.hibernate.cfg.HbmBinder(bindProperty)  - Mapped property: departamento -> DEPTNO
149109 [2010-10-01 11:02:10,592] [http-8080-exec-9] - DEBUG org.hibernate.cfg.HbmBinder(bindProperty)  - Mapped property: nombre -> ENAME
149109 [2010-10-01 11:02:10,592] [http-8080-exec-9] - DEBUG org.hibernate.cfg.HbmBinder(bindProperty)  - Mapped property: puesto -> JOB
149109 [2010-10-01 11:02:10,592] [http-8080-exec-9] - DEBUG org.hibernate.cfg.HbmBinder(bindProperty)  - Mapped property: idManager -> MGR
149109 [2010-10-01 11:02:10,592] [http-8080-exec-9] - DEBUG org.hibernate.cfg.HbmBinder(bindProperty)  - Mapped property: hireDate -> HIREDATE
149109 [2010-10-01 11:02:10,592] [http-8080-exec-9] - DEBUG org.hibernate.cfg.HbmBinder(bindProperty)  - Mapped property: salario -> SAL
149109 [2010-10-01 11:02:10,592] [http-8080-exec-9] - DEBUG org.hibernate.cfg.HbmBinder(bindProperty)  - Mapped property: comision -> COMM
149109 [2010-10-01 11:02:10,592] [http-8080-exec-9] - DEBUG org.hibernate.cfg.Configuration(parseMappingElement)  - null<-org.dom4j.tree.DefaultAttribute@2c06b2 [Attribute: name resource value "hibernate/Departamento.hbm.xml"]

...

149188 [2010-10-01 11:02:10,671] [http-8080-exec-9] - ERROR hibernate.EmpleadoManager(<init>)  - EmpleadoManager()
org.hibernate.MappingException: entity class not found: Empleado
at org.hibernate.mapping.PersistentClass.getMappedClass(PersistentClass.java:125)
at org.hibernate.tuple.PropertyFactory.getGetter(PropertyFactory.java:191)
at org.hibernate.tuple.PropertyFactory.buildIdentifierProperty(PropertyFactory.java:67)
at org.hibernate.tuple.entity.EntityMetamodel.<init>(EntityMetamodel.java:136)
at org.hibernate.persister.entity.AbstractEntityPersister.<init>(AbstractEntityPersister.java:475)
at org.hibernate.persister.entity.SingleTableEntityPersister.<init>(SingleTableEntityPersister.java:133)
at org.hibernate.persister.PersisterFactory.createClassPersister(PersisterFactory.java:84)
at org.hibernate.impl.SessionFactoryImpl.<init>(SessionFactoryImpl.java:297)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1385)
at hibernate.EmpleadoManager.<init>(EmpleadoManager.java:36)
at persistencia.EmpleadosDAO.getVectorEmpleados(EmpleadosDAO.java:31)
at negocio.ServiciosEmpleado.getVectorEmpleados(ServiciosEmpleado.java:15)
at action.ListarEmpleadosAction.execute(ListarEmpleadosAction.java:33)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:452)
at com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:291)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:254)
at com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:176)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
at com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:263)
at org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:68)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
at com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:133)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:207)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:207)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
at com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:190)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
at org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectInterceptor.java:75)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
at org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:94)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
at org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:243)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
at com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:100)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
at com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:141)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
at org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:267)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
at com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:142)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
at com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:166)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
at com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:176)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
at org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
at com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:190)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
at com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:187)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
at org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:52)
at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:485)
at org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:395)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:242)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:243)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:201)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:163)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:108)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:401)
at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:281)
at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:579)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:1568)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: Empleado
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1666)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1511)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at org.hibernate.util.ReflectHelper.classForName(ReflectHelper.java:192)
at org.hibernate.mapping.PersistentClass.getMappedClass(PersistentClass.java:122)
... 78 more



Thank U !!!
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rafamarquez
 Post subject: Re: org.hibernate.MappingException: entity class not found
PostPosted: Tue Oct 05, 2010 4:17 pm 
Newbie

Joined: Fri Oct 01, 2010 6:35 am
Posts: 2
SOLUTION:
Code:
<class name="hibernate.Empleado" table="EMP" schema="SCOTT">


It was the missing package.
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