com.mybatisflex.annotation.Id Maven / Gradle / Ivy
/*
* Copyright (c) 2022-2023, Mybatis-Flex ([email protected]).
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.mybatisflex.annotation;
import java.lang.annotation.*;
/**
* 数据库表中的列信息注解。
*/
@Inherited
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.FIELD})
public @interface Id {
/**
* ID 生成策略,默认为 {@link KeyType#None}。
*
* @return 生成策略
*/
KeyType keyType() default KeyType.None;
/**
*
若 keyType 类型是 sequence, value 则代表的是
* sequence 序列的 sql 内容。
* 例如:select SEQ_USER_ID.nextval as id from dual
*
*
若 keyType 是 Generator,value 则代表的是使用的那个 keyGenerator 的名称。
*/
String value() default "";
/**
*
sequence 序列执行顺序。
*
*
是在 entity 数据插入之前执行,还是之后执行,之后执行的一般是数据主动生成的 id。
*
* @return 执行之前还是之后
*/
boolean before() default true;
/**
* 数据库字段注释,在 AI 时代,注释的内容往往可用于 AI 辅助对话
*/
String comment() default "";
}