AssociationOverrides (Java EE 5)

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SUMMARY: REQUIRED | OPTIONAL

DETAIL: ELEMENT

javax.persistence Annotation Type AssociationOverrides

@Target(value={TYPE,METHOD,FIELD}) @Retention(value=RUNTIME) public @interface AssociationOverrides

Implements: Annotation

@Target(value={TYPE, METHOD, FIELD})
@Retention(value=RUNTIME)

此注释用于重写关系属性或字段的多个多对一或一对一映射。

    
示例：
    @MappedSuperclass
    public class Employee {
    
        @Id protected Integer id;
        @Version protected Integer version;
        @ManyToOne protected Address address;
        @OneToOne protected Locker locker;
    
        public Integer getId() { ... }
        public void setId(Integer id) { ... }
        public Address getAddress() { ... }
        public void setAddress(Address address) { ... }
        public Locker getLocker() { ... }
        public void setLocker(Locker locker) { ... }
    
    }
    
    @Entity
    @AssociationOverrides({
    
    @AssociationOverride(name="address", 
            joinColumns=@JoinColumn("ADDR_ID")),
        @AttributeOverride(name="locker", 
            joinColumns=@JoinColumn("LCKR_ID"))})
    public PartTimeEmployee { ... }

since

Java Persistence 1.0

英文文档：

This annotation is used to override mappings of multiple many-to-one or one-to-one relationship properties or fields.

    
    Example:
    @MappedSuperclass
    public class Employee {
    
        @Id protected Integer id;
        @Version protected Integer version;
        @ManyToOne protected Address address;
        @OneToOne protected Locker locker;
    
        public Integer getId() { ... }
        public void setId(Integer id) { ... }
        public Address getAddress() { ... }
        public void setAddress(Address address) { ... }
        public Locker getLocker() { ... }
        public void setLocker(Locker locker) { ... }
    
    }
    
    @Entity
    @AssociationOverrides({
    
    @AssociationOverride(name="address", 
            joinColumns=@JoinColumn("ADDR_ID")),
        @AttributeOverride(name="locker", 
            joinColumns=@JoinColumn("LCKR_ID"))})
    public PartTimeEmployee { ... }

Since:: Java Persistence 1.0

Required Element Summary
`AssociationOverride[]`	`value` Mapping overrides of relationship properties or fields

Element Detail

abstract public AssociationOverride[] value()
关系属性或字段的映射重写

英文文档：
value

public abstract AssociationOverride[] value

Mapping overrides of relationship properties or fields