Hibernate version: 3 
I'm trying to switch domain from xml mapping to annotations but I have a problem. Hibernate throws error:
Invocation of init method failed; nested exception is org.hibernate.MappingException: Could not determine type for: domain.Category, for columns: [org.hibernate.mapping.Column(parentId)]
old xml file ( working fine):
Code:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
    "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
    <class name="domain.Category" table="categories" lazy="false">
    <id name="id" column="id">
        <generator class="native"/>
    </id>
    <property name="name">
        <column name="name"/>
    </property>
    
    <many-to-one 
       name="category"
       cascade="all"
       column="parentId"
       foreign-key="FK_CATEGORIES_1" />
       
    <property name="active">
        <column name="active"/>
    </property>
</class>
</hibernate-mapping>
Domain was normal setter and getter.
New annoted domain class:
Code:
/**
 * 
 */
package domain;
import javax.persistence.*;
/**
 * @author Michał Warecki
 *
 */
@Entity
@AttributeOverride( name="category", column = @Column(name="parentId") )
public class Category{
   
   @Id
    @GeneratedValue(strategy=GenerationType.AUTO)
   private Integer id;
   
    private String name;
    private Category category;
    private Integer active;
    public Category() {
    }
    
    public Integer getId(){
        return id;
    }
    public void setId(Integer id){
        this.id = id;
    }
    
    @Column (name="name")
    public String getName(){
        return name;
    }
    public void setName(String name){
        this.name = name;
    }
    
    @ManyToOne( cascade = {CascadeType.PERSIST, CascadeType.MERGE})
    @JoinTable(   name="Category",
               joinColumns = @JoinColumn(name="id"),
               inverseJoinColumns = @JoinColumn(name="parentId")
    )
    public Category getCategory(){
        return category;
    }   
    public void setCategory(Category category){
       this.category = category;
    }
    
    @Column (name="active")
    public Integer getActive(){
        return active;
    }   
    public void setActive(Integer active){
        this.active = active;
    }
}
I'm new with hibernate. Can somebody help me with this error? I can't solved it :-/
Thx for help !