javax.persistence批注是否缺少可选元素？

Question

我们正在将Play框架应用程序从2.3.10升级到2.4.8，并在此基础上从Ebean 3.x升级到4.6.2。

我现在看到了编译错误，指出一些javax.persistence注释缺少字段。两个版本的Ebean都依赖于javax.persistence的1.0版本。

奇怪的是，IntelliJ显示注释缺少可选元素，但注释的Javadoc提到了可选元素。注意，编译也会在

例如，下面是IntelliJ为javax.persistence.UniqueConstraint显示的源代码

/**
 * This annotation is used to specify that a unique constraint 
 * is to be included in the generated DDL for a primary or secondary table.
 *
 * <pre>
 *    Example:
 *    &#064;Entity
 *    &#064;Table(
 *        name="EMPLOYEE", 
 *        uniqueConstraints=
 *            &#064;UniqueConstraint(columnNames={"EMP_ID", "EMP_NAME"})
 *    )
 *    public class Employee { ... }
 * </pre>
 *
 * @since Java Persistence 1.0
 */
@Target({TYPE}) 
@Retention(RUNTIME)

public @interface UniqueConstraint {

    /** (Required) An array of the column names that make up the constraint. */
    String[] columnNames();
}