Sequence

Sequence 接口用于将数组字段作为序列存储在数据库中。

类定义

    @Target(ElementType.FIELD)
    @Retention(RetentionPolicy.RUNTIME)
    public @interface Sequence 
    {
        public enum Order 
        {
            None,
            Ascending,
            Descending
        }
        Order order() default Order.None;
 
        public enum Type 
        {
            UInt1,
            UInt2,
            UInt4,
            UInt8,
            Int1,
            Int2,
            Int4,
            Int8,
            Float,
            Double,
            Char,
            DateTime
        }
         
        Type type();
 
        /**
        * Size of sequence element: needed only for sequence of char
        */
        int elemSize() default 0;
    };