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com.gitee.hengboy.mybatis.enhance.dsl.expression.TableExpression Maven / Gradle / Ivy

package com.gitee.hengboy.mybatis.enhance.dsl.expression;

import com.gitee.hengboy.mybatis.enhance.dsl.exception.ColumnException;

/**
 * 定义了查询表的表达式类型
 * 实现表达式接口com.gitee.hengboy.mybatis.enhance.dsl.serach.expression.Expression全部方法
 *
 * @author:于起宇 

* ================================ * Created with IDEA. * Date:2018/8/10 * Time:2:40 PM * 简书:http://www.jianshu.com/u/092df3f77bca * 码云:https://gitee.com/hengboy * GitHub:https://github.com/hengyuboy * ================================ *

*/ public abstract class TableExpression extends AbstractExpression { /** * 构造函数初始化根描述 * * @param root 表名 或者 列名 */ public TableExpression(String root) { super(root); } /** * 获取定义的所有列表达式 * * @return 列表达式数组 */ public abstract ColumnExpression[] getColumns(); /** * @return 列表达式数组 * @throws ColumnException 列异常 */ @Override public ColumnExpression getSlfe() throws ColumnException { return null; } /** * 设置表的别名 * * @param asName 别名内容 * @return 表达式 */ @Override public TableExpression as(String asName) { this.asName = asName; return this; } }




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