78 lines
2.2 KiB
Java
78 lines
2.2 KiB
Java
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package com.gunshi.project.hsz.service;
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import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
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import com.gunshi.project.hsz.mapper.StZvarlBMapper;
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import com.gunshi.project.hsz.model.StZvarlB;
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import lombok.extern.slf4j.Slf4j;
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import org.springframework.stereotype.Service;
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import org.springframework.transaction.annotation.Transactional;
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import java.math.BigDecimal;
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import java.math.RoundingMode;
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import java.util.List;
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import java.util.Map;
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import java.util.stream.Collectors;
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/**
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* 描述: 库( 湖)容曲线表
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* author: xusan
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* date: 2024-07-08 17:30:38
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*/
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@Service
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@Slf4j
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@Transactional(rollbackFor = Exception.class)
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public class StZvarlBService extends ServiceImpl<StZvarlBMapper, StZvarlB> {
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/**
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* 根据水位查表得库容
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*
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* @param rz 水位
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* @return 查表库容
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* @author lyf
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*/
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public BigDecimal getWFromZvarl(BigDecimal rz) {
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return getWFromZvarl(rz, BigDecimal.ZERO, list());
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}
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/**
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* 根据水位查表得库容
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*
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* @param rz 水位
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* @param defaultValue 查不到时默认值
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* @return 查表库容
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* @author lyf
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*/
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public BigDecimal getWFromZvarl(BigDecimal rz, BigDecimal defaultValue) {
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return getWFromZvarl(rz, defaultValue, list());
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}
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/**
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* 根据水位查表得库容
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*
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* @param rz 水位
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* @param defaultValue 查不到时默认值
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* @param zvarlList 水位库容关系曲线
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* @return 查表库容
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* @author lyf
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*/
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public BigDecimal getWFromZvarl(BigDecimal rz, BigDecimal defaultValue, List<StZvarlB> zvarlList) {
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return toMap(zvarlList).getOrDefault(rz.setScale(3, RoundingMode.DOWN), defaultValue);
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}
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/**
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* 将水位库容曲线列表转为字典，水位作为键，注意BigDecimal做键的时候要匹配值和精度
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*
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* @param zvarlList 水位库容曲线列表
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* @return 水位库容曲线字典
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* @author lyf
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*/
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private Map<BigDecimal, BigDecimal> toMap(List<StZvarlB> zvarlList) {
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return zvarlList.stream()
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.map(item -> Map.entry(item.getRz().setScale(3, RoundingMode.DOWN), item.getW()))
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.collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue));
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}
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}
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