BaseMapperX

标签：return default value field BaseMapperX import new

package cn.iocoder.yudao.framework.mybatis.core.mapper;

import cn.iocoder.yudao.framework.common.pojo.PageParam;
import cn.iocoder.yudao.framework.common.pojo.PageResult;
import cn.iocoder.yudao.framework.mybatis.core.util.MyBatisUtils;
import com.baomidou.mybatisplus.core.conditions.Wrapper;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.core.toolkit.support.SFunction;
import com.baomidou.mybatisplus.extension.toolkit.Db;
import org.apache.ibatis.annotations.Param;

import java.util.Collection;
import java.util.List;

/**
 * 在 MyBatis Plus 的 BaseMapper 的基础上拓展，提供更多的能力
 */
public interface BaseMapperX<T> extends BaseMapper<T> {

    default PageResult<T> selectPage(PageParam pageParam, @Param("ew") Wrapper<T> queryWrapper) {
        // MyBatis Plus 查询
        IPage<T> mpPage = MyBatisUtils.buildPage(pageParam);
        selectPage(mpPage, queryWrapper);
        // 转换返回
        return new PageResult<>(mpPage.getRecords(), mpPage.getTotal());
    }

    default T selectOne(String field, Object value) {
        return selectOne(new QueryWrapper<T>().eq(field, value));
    }

    default T selectOne(SFunction<T, ?> field, Object value) {
        return selectOne(new LambdaQueryWrapper<T>().eq(field, value));
    }

    default T selectOne(String field1, Object value1, String field2, Object value2) {
        return selectOne(new QueryWrapper<T>().eq(field1, value1).eq(field2, value2));
    }

    default T selectOne(SFunction<T, ?> field1, Object value1, SFunction<T, ?> field2, Object value2) {
        return selectOne(new LambdaQueryWrapper<T>().eq(field1, value1).eq(field2, value2));
    }

    default Long selectCount() {
        return selectCount(new QueryWrapper<T>());
    }

    default Long selectCount(String field, Object value) {
        return selectCount(new QueryWrapper<T>().eq(field, value));
    }

    default Long selectCount(SFunction<T, ?> field, Object value) {
        return selectCount(new LambdaQueryWrapper<T>().eq(field, value));
    }

    default List<T> selectList() {
        return selectList(new QueryWrapper<>());
    }

    default List<T> selectList(String field, Object value) {
        return selectList(new QueryWrapper<T>().eq(field, value));
    }

    default List<T> selectList(SFunction<T, ?> field, Object value) {
        return selectList(new LambdaQueryWrapper<T>().eq(field, value));
    }

    default List<T> selectList(String field, Collection<?> values) {
        return selectList(new QueryWrapper<T>().in(field, values));
    }

    default List<T> selectList(SFunction<T, ?> field, Collection<?> values) {
        return selectList(new LambdaQueryWrapper<T>().in(field, values));
    }

    default List<T> selectList(SFunction<T, ?> leField, SFunction<T, ?> geField, Object value) {
        return selectList(new LambdaQueryWrapper<T>().le(leField, value).ge(geField, value));
    }

    /**
     * 批量插入，适合大量数据插入
     *
     * @param entities 实体们
     */
    default void insertBatch(Collection<T> entities) {
        Db.saveBatch(entities);
    }

    /**
     * 批量插入，适合大量数据插入
     *
     * @param entities 实体们
     * @param size     插入数量 Db.saveBatch 默认为 1000
     */
    default void insertBatch(Collection<T> entities, int size) {
        Db.saveBatch(entities, size);
    }

    default void updateBatch(T update) {
        update(update, new QueryWrapper<>());
    }

    default void updateBatch(Collection<T> entities, int size) {
        Db.updateBatchById(entities, size);
    }

}

标签：return,default,value,field,BaseMapperX,import,new
From： https://www.cnblogs.com/atwood-pan/p/17136139.html