io.github.jinghui70.rainbow.dbaccess.Range Maven / Gradle / Ivy
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package io.github.jinghui70.rainbow.dbaccess;
import cn.hutool.core.lang.Assert;
import java.util.Objects;
/**
* 值范围对象，from为空表示无下限，to为空表示无上限。不能同时为空
*
* @param 值的泛型
* @author lijinghui
*/
public class Range> {
private T from;
private T to;
public Range() {
}
public T getFrom() {
return from;
}
public void setFrom(T from) {
this.from = from;
}
public T getTo() {
return to;
}
public void setTo(T to) {
this.to = to;
}
public void regular() {
if (from == null) {
Assert.notNull(to);
} else {
if (to != null && from.compareTo(to) > 0) {
T mid = from;
from = to;
to = mid;
}
}
}
/**
* check if the range is full range,means the from and to both is not null
*
* @return true if the range is full range,false otherwise
*/
public boolean fullRange() {
return from != null && to != null;
}
/**
* check if the range is a single value
*
* @return true if the range is single value,false otherwise
*/
public boolean singleValue() {
return Objects.equals(to, from);
}
/**
* create a new range
* @param from from value
* @param to to value
* @return range object
* @param value type
*/
public static > Range of(T from, T to) {
Range result = new Range<>();
result.setFrom(from);
result.setTo(to);
result.regular();
return result;
}
}