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package cn.jiangzeyin.database.run;

import java.sql.Connection;

/**
 * 事务级别枚举
 *
 * @see Connection#TRANSACTION_NONE
 * @see Connection#TRANSACTION_READ_UNCOMMITTED
 * @see Connection#TRANSACTION_READ_COMMITTED
 * @see Connection#TRANSACTION_REPEATABLE_READ
 * @see Connection#TRANSACTION_SERIALIZABLE
 * @since 4.1.2
 */
public enum TransactionLevel {
    /**
     * 驱动不支持事务
     */
    NONE(Connection.TRANSACTION_NONE),
    /**
     * 允许脏读、不可重复读和幻读
     */
    READ_UNCOMMITTED(Connection.TRANSACTION_READ_UNCOMMITTED),
    /**
     * 禁止脏读，但允许不可重复读和幻读
     */
    READ_COMMITTED(Connection.TRANSACTION_READ_COMMITTED),
    /**
     * 禁止脏读和不可重复读，单运行幻读
     */
    REPEATABLE_READ(Connection.TRANSACTION_REPEATABLE_READ),
    /**
     * 禁止脏读、不可重复读和幻读
     */
    SERIALIZABLE(Connection.TRANSACTION_SERIALIZABLE);

    /**
     * 事务级别，对应Connection中的常量值
     */
    private int level;

    TransactionLevel(int level) {
        this.level = level;
    }

    /**
     * 获取数据库事务级别int值
     *
     * @return 数据库事务级别int值
     */
    public int getLevel() {
        return this.level;
    }
}