mapovanie collections Map + interface a "property mapping has wrong number of columns"

Fri, 25 Jan 2008 14:09:05 -0800 

Ahojte,
mam otazku ohladom pouzivania interface a mapovanie collections , konkretne Map. 


poprosim niekoho kto pouziva mapovanie interfacov , je toto dobre 
pouzite. ak ano preco mam chybu



nested exception is org.hibernate.MappingException: property mapping has 
wrong number of columns: com.xxxx.model.HousePropertyValue.value type: 
object


stale mam pocit ze je zle napisany interface.

mam triedu House.java, kde je definovana Map:


@OneToMany(mappedBy = "house", 
           fetch = FetchType.LAZY, cascade = CascadeType.ALL,

               targetEntity = com.xxx.model.HousePropertyValue.class)
   @MapKey(name = "valueKey")
   private Map<String, HousePropertyValue> housePropertyValues;

kde HousePropertyValue je interface:

@Entity
@Inheritance(strategy=InheritanceType.SINGLE_TABLE)
@DiscriminatorColumn(name="value_type",
   discriminatorType=DiscriminatorType.STRING
)
@Table(name="house_property_value")
@javax.persistence.SequenceGenerator(
   name="seq_house_property_value",
   sequenceName="s_house_property_value",
   allocationSize=1
)
public interface HousePropertyValue extends Serializable {
   @Id

   @GeneratedValue(strategy = GenerationType.SEQUENCE, 
generator="seq_house_property_value")

   public Long getId();
   public void setId(Long id);
   @Column(name="value_key", nullable = false)
   public String getValueKey();
   public void setValueKey(String valueKey);
   @ManyToOne (fetch = FetchType.LAZY, cascade = CascadeType.ALL)

   @JoinColumn(name = "fk_house_id", referencedColumnName = "id", 
nullable = false)

   public House getHouse();
   public void setHouse(House house);
   public Object getValue();
   public void setValue(Object value);
}




a potom triedu HousePropertyDateValue.java, ktora implementuje dane 
rozhranie:


@Entity
@DiscriminatorValue("DATE")
@javax.persistence.SequenceGenerator(
   name="seq_house_property_value",
   sequenceName="s_house_property_value",
   allocationSize=1
)
public class HousePropertyDateValue implements HousePropertyValue {

   @Id

   @GeneratedValue(strategy = GenerationType.SEQUENCE, 
generator="seq_house_property_value")

   private Long id;

   private House house;

   private String valueKey;

   @Column(name="value_date", nullable=false)
   private Date value = new Date();

   public HousePropertyDateValue() {}

   public HousePropertyDateValue(Date value) {      this.value = 
value;    }

   public Long getId() {       return id;    }
   public void setId(Long id) {         this.id = id;    }
   public String getValueKey() {         return valueKey;    }

   public void setValueKey(String valueKey) {        this.valueKey = 
valueKey;    }

   public House getHouse() {        return house;    }
   public void setHouse(House house) {        this.house = house;    }
   public Date getValue()    {        return value;    }
   public void setValue( Date value )    {        this.value = value;    }

   public void setValue( Object value )    {        this.value = (Date) 
value;    }

}

dakujem

Ivan














    











					Odpovedet emailem