cn.hutool.core.comparator

Class FuncComparator<T>

java.lang.Object

cn.hutool.core.comparator.NullComparator<T>

cn.hutool.core.comparator.FuncComparator<T>

Type Parameters:

T - 被比较的对象

All Implemented Interfaces:

Serializable, Comparator<T>

Direct Known Subclasses:

FieldComparator, PropertyComparator

public class FuncComparator<T>
extends NullComparator<T>

指定函数排序器

Author:

looly

See Also:

Serialized Form

Field Summary

Fields inherited from class cn.hutool.core.comparator.NullComparator

comparator, nullGreater

Constructor Summary

Constructors

Constructor and Description
FuncComparator(boolean nullGreater, boolean compareSelf, Function<T,Comparable<?>> func) 构造
FuncComparator(boolean nullGreater, Function<T,Comparable<?>> func) 构造

Method Summary

Methods inherited from class cn.hutool.core.comparator.NullComparator

compare, doCompare, thenComparing

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface java.util.Comparator

comparing, comparing, comparingDouble, comparingInt, comparingLong, equals, naturalOrder, nullsFirst, nullsLast, reversed, reverseOrder, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

Constructor Detail

FuncComparator

public FuncComparator(boolean nullGreater,
                      Function<T,Comparable<?>> func)

构造

Parameters:

nullGreater - 是否null在后

func - 比较项获取函数，此函数根据传入的一个对象，生成对应的可比较对象，然后根据这个返回值比较

FuncComparator

public FuncComparator(boolean nullGreater,
                      boolean compareSelf,
                      Function<T,Comparable<?>> func)

构造

Parameters:

nullGreater - 是否null在后

compareSelf - 在字段值相同情况下，是否比较对象本身。 如果此项为false，字段值比较后为0会导致对象被认为相同，可能导致被去重。

func - 比较项获取函数