javax.persistence.AttributeOverride Maven / Gradle / Ivy
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package javax.persistence;
import java.lang.annotation.Target;
import java.lang.annotation.Retention;
import static java.lang.annotation.ElementType.TYPE;
import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.ElementType.FIELD;
import static java.lang.annotation.RetentionPolicy.RUNTIME;
/**
* The AttributeOverride annotation is used to
* override the mapping of a {@link Basic} (whether explicit or
* default) property or field or Id property or field.
*
* The AttributeOverride annotation may be
* applied to an entity that extends a mapped superclass or to
* an embedded field or property to override a basic mapping
* defined by the mapped superclass or embeddable class. If the
* AttributeOverride annotation is not specified,
* the column is mapped the same as in the original mapping.
*
*
* Example:
*
* @MappedSuperclass
* public class Employee {
* @Id protected Integer id;
* @Version protected Integer version;
* protected String address;
* public Integer getId() { ... }
* public void setId(Integer id) { ... }
* public String getAddress() { ... }
* public void setAddress(String address) { ... }
* }
*
* @Entity
* @AttributeOverride(name="address", column=@Column(name="ADDR"))
* public class PartTimeEmployee extends Employee {
* // address field mapping overridden to ADDR
* protected Float wage();
* public Float getHourlyWage() { ... }
* public void setHourlyWage(Float wage) { ... }
* }
*
*
* @see Embedded
* @see Embeddable
* @see MappedSuperclass
*
* @since Java Persistence 1.0
*/
@Target({TYPE, METHOD, FIELD})
@Retention(RUNTIME)
public @interface AttributeOverride {
/**
* (Required) The name of the property whose mapping is being
* overridden if property-based access is being used, or the
* name of the field if field-based access is used.
*/
String name();
/**
* (Required) The column that is being mapped to the persistent
* attribute. The mapping type will remain the same as is
* defined in the embeddable class or mapped superclass.
*/
Column column();
}