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/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2014-2017 [email protected]
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package tk.mybatis.mapper.annotation;

import tk.mybatis.mapper.code.IdentityDialect;
import tk.mybatis.mapper.code.ORDER;
import tk.mybatis.mapper.genid.GenId;
import tk.mybatis.mapper.gensql.GenSql;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

/**
 * 主键策略，用于替换 JPA 中的复杂用法
 *
 * @author liuzh
 * @since 2015-10-29 22:00
 */
@Target({ElementType.FIELD, ElementType.METHOD})
@Retention(RetentionPolicy.RUNTIME)
public @interface KeySql {

    /**
     * 是否使用 JDBC 方式获取主键，优先级最高，设置为 true 后，不对其他配置校验
     *
     * @return
     */
    boolean useGeneratedKeys() default false;

    /**
     * 优先级第二，根据配置的数据库类型取回主键，忽略其他配置
     *
     * @return
     */
    IdentityDialect dialect() default IdentityDialect.NULL;

    /**
     * 取主键的 SQL
     *
     * @return
     */
    String sql() default "";

    /**
     * 生成 SQL，初始化时执行，优先级低于 sql
     *
     * @return
     */
    Class genSql() default GenSql.NULL.class;

    /**
     * 和 sql 可以配合使用，默认使用全局配置中的 ORDER
     *
     * @return
     */
    ORDER order() default ORDER.DEFAULT;

    /**
     * Java 方式生成主键，可以和发号器一类的服务配合使用
     *
     * @return
     */
    Class genId() default GenId.NULL.class;

}