hx-base/my-test/src/main/java/org/example/join/model/IQueryColumn.java

package org.example.join.model;

import cn.hutool.core.util.StrUtil;
import com.baomidou.mybatisplus.core.toolkit.LambdaUtils;
import com.baomidou.mybatisplus.core.toolkit.StringPool;
import com.baomidou.mybatisplus.core.toolkit.support.LambdaMeta;
import com.baomidou.mybatisplus.core.toolkit.support.SFunction;
import org.apache.ibatis.reflection.property.PropertyNamer;

public interface IQueryColumn extends IFormat {

    static IQueryColumn create(Object obj) {
        return obj::toString;
    }

    static IQueryColumn create(Object obj, String alias) {
        return () -> obj.toString() + StringPool.SPACE + alias;
    }

    static <T> IQueryColumn create(Object obj, SFunction<T, ?> function) {
        LambdaMeta meta = LambdaUtils.extract(function);
        String alias = StrUtil.toUnderlineCase(PropertyNamer.methodToProperty(meta.getImplMethodName()));
        return () -> obj.toString() + StringPool.SPACE + alias;
    }

}