top.doudou.common.tool.utils.SectionUtil Maven / Gradle / Ivy
package top.doudou.common.tool.utils;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.collections.CollectionUtils;
import top.doudou.base.exception.CustomException;
import top.doudou.common.tool.dto.SectionDto;
import java.io.Serializable;
import java.math.BigDecimal;
import java.util.List;
/**
* @Description 区间判定的工具类
* @Author 傻男人 <[email protected]>
* @Date 2020-10-09 10:14
* @Version V1.0
*/
@Slf4j
public class SectionUtil implements Serializable {
/**
* 比较大小 -1后者大0相等1前者大
* @param pre
* @param val
* @return
*/
public static int compareTo(BigDecimal pre, BigDecimal val) {
if (null == pre || null == val ) {
return 1;
}
return pre.compareTo(val);
}
/**
* 判断两个区间是否有重合值
* @param source
* @param record
* @return false无重合 true有重合
*/
public static boolean hasRepeat(SectionDto source, SectionDto record) {
BigDecimal min = record.getMin();
BigDecimal max = record.getMax();
boolean hasContainMin = record.isContainMin();
boolean hasContainMax = record.isContainMax();
boolean front = false;
boolean behind = false;
int frontResult = compareTo(source.getMax(), min);
if ((frontResult == 0 && source.isContainMax() && hasContainMin) || (frontResult > 0)) {
front = true;
}
int behindResult = compareTo(max, source.getMin());
if ((behindResult == 0 && source.isContainMin() && hasContainMax) || behindResult > 0) {
behind = true;
}
return front && behind;
}
/**
* 判断区间在list中是否有重合
* @param source
* @param record
* @return false无重合 true有重合
*/
public static boolean hasRepeat(SectionDto source, List record) {
if(CollectionUtils.isEmpty(record)){
return false;
}
for(SectionDto item : record){
if(hasRepeat(source,item)){
return true;
}
}
return false;
}
/**
* 判断当前区间是否包含val,并返回区间所在的list中对应的具体值
* @param val
* @param record 区间list
* @param list 区间对应实体的list
* @return
*/
public static T getCompareEntity(BigDecimal val, List record, List list) {
if(CollectionUtils.isEmpty(record) || CollectionUtils.isEmpty(list)){
throw new CustomException("区间的列表与区间对应实体列表不能为空");
}
if(record.size() != list.size()){
throw new CustomException("区间的列表与区间对应实体列表长度不相等");
}
for (int i = 0; i < record.size(); i++) {
SectionDto item = record.get(i);
int compare = compareTo(item.getMin(), val);
if (compare == 1) {
continue;
}
if (compare == 0 && item.getMin().equals(0)) {
log.info("比较的值为：" + val + " item:" + item);
return list.get(i);
}
if (compare == -1) {
int after = compareTo(val, item.getMax());
if (after == 0 && item.getMax().equals(0)) {
log.info("比较的值为：" + val + " item:" + item);
return list.get(i);
}
if (after == -1) {
log.info("比较的值为：" + val + " item:" + item);
return list.get(i);
}
}
}
return null;
}
/**
* @description: 比较集合中区间是否有重叠
* @param list1 待比较集合1
* @param list2 待比较集合2
* @return false无重合 true有重合
*/
public static boolean hasRepeat(List list1, List list2) {
for (SectionDto item1 : list1) {
for (SectionDto item2 : list2) {
if (hasRepeat(item1,item2)) {
return true;
}
}
}
return false;
}
}