PrimaryKeyJoinColumns (Java EE 5 SDK)

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Java EE 5 SDK

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摘要: REQUIRED | OPTIONAL

详细信息: ELEMENT

javax.persistence Annotation Type PrimaryKeyJoinColumns

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

This annotation groups PrimaryKeyJoinColumn annotations. It is used to map composite foreign keys.

    Example 1: ValuedCustomer subclass

    @Entity
    @Table(name="VCUST")
    @DiscriminatorValue("VCUST")
    @PrimaryKeyJoinColumns({
        @PrimaryKeyJoinColumn(name="CUST_ID", 
            referencedColumnName="ID"),
        @PrimaryKeyJoinColumn(name="CUST_TYPE",
            referencedColumnName="TYPE")
    })
    public class ValuedCustomer extends Customer { ... }

从以下版本开始:: Java Persistence 1.0

Required Element Summary
`PrimaryKeyJoinColumn[]`	`value` One or more `PrimaryKeyJoinColumn` annotations.

元素详细信息

value

public abstract PrimaryKeyJoinColumn[] value

One or more PrimaryKeyJoinColumn annotations.

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