/**
* Copyright (c) 2011-2014, hubin (jobob@qq.com).
* <p>
* 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
* <p>
* http://www.apache.org/licenses/LICENSE-2.0
* <p>
* 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.baomidou.mybatisplus.mapper;
import com.baomidou.mybatisplus.toolkit.ReflectionKit;
import com.baomidou.mybatisplus.toolkit.StringUtils;
/**
* <p>
* Entity 对象封装操作类,定义T-SQL语法
* </p>
*
* @author hubin , yanghu , Dyang , Caratacus
* @Date 2016-11-7
*/
@SuppressWarnings("serial")
public class EntityWrapper<T> extends Wrapper<T> {
/**
* 数据库表映射实体类
*/
protected T entity = null;
public EntityWrapper() {
/* 注意,传入查询参数 */
}
public EntityWrapper(T entity) {
this.entity = entity;
}
public EntityWrapper(T entity, String sqlSelect) {
this.entity = entity;
this.sqlSelect = sqlSelect;
}
public T getEntity() {
return entity;
}
public void setEntity(T entity) {
this.entity = entity;
}
/**
* SQL 片段
*/
@Override
public String getSqlSegment() {
/*
* 无条件
*/
String sqlWhere = sql.toString();
if (StringUtils.isEmpty(sqlWhere)) {
return null;
}
/*
* 根据当前实体判断是否需要将WHERE替换成 AND 增加实体不为空但所有属性为空的情况
*/
if (isWhere != null) {
sqlWhere = isWhere ? sqlWhere : sqlWhere.replaceFirst("WHERE", AND_OR);
} else {
sqlWhere = ReflectionKit.checkFieldValueNotNull(entity) ? sqlWhere.replaceFirst("WHERE", AND_OR) : sqlWhere;
}
return sqlWhere;
}
}