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package com.mybatis.pj.example.update;

import java.util.ArrayList;
import java.util.List;

import com.mybatis.pj.example.BaseExample;
import com.mybatis.pj.exception.ExampleException;
import com.mybatis.pj.exception.example.NoUpdateFieldException;

public class UpdateBaseExample extends BaseExample {
//    private Map updateFields;
    
    private List updateFields;
    private List updateValue;
    
    public UpdateBaseExample (String tableName) {
        super.addTableName(tableName);
    }

    /**
     *
     * @throws ExampleException 异常
     */
    @Override
    public void end() throws ExampleException {
        super.end();
        //判断更新时是否有传入更新字段，否则抛出异常
        if(updateFields==null ||updateFields.size()==0){
            throw new NoUpdateFieldException("使用UpdateBaseExample时更新字段不能为空！");
        }else {
        	if(updateFields.size() != updateValue.size()) {
        		throw new NoUpdateFieldException("使用UpdateBaseExample时更新字段个数应和更新的值个数一致！");
        	}
        }
    }

    /**
     * 增加字段方法  类似于sql语句的   set   field   =  newValue
     * @param field  字段名
     * @param newValue   新值
     * @return UpdateBaseExample对象
     */
    public UpdateBaseExample addUpdateField(String field,Object newValue) {
        if(this.updateFields == null) {
            this.updateFields = new ArrayList<>();
            this.updateValue = new ArrayList<>();
        }
        this.updateFields.add(field);
        this.updateValue.add(newValue);
        return this;
    }

	public List getUpdateFields() {
		return updateFields;
	}

	public void setUpdateFields(List updateFields) {
		this.updateFields = updateFields;
	}

	public List getUpdateValue() {
		return updateValue;
	}

	public void setUpdateValue(List updateValue) {
		this.updateValue = updateValue;
	}

    
}
    

    

    

                
 
            

    

                
 
            



    
    






    
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