From ea10e836d4864d6ac5bf914f2513691374884473 Mon Sep 17 00:00:00 2001
From: 721806280 <33091348+721806280@users.noreply.github.com>
Date: Fri, 25 Mar 2022 10:53:53 +0800
Subject: [PATCH] :sparkles: add comparingIndexed method to CompareUtil.

---
 .../hutool/core/comparator/CompareUtil.java   | 31 +++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/hutool-core/src/main/java/cn/hutool/core/comparator/CompareUtil.java b/hutool-core/src/main/java/cn/hutool/core/comparator/CompareUtil.java
index d91516a09..1fb965958 100644
--- a/hutool-core/src/main/java/cn/hutool/core/comparator/CompareUtil.java
+++ b/hutool-core/src/main/java/cn/hutool/core/comparator/CompareUtil.java
@@ -152,4 +152,35 @@ public class CompareUtil {
 		}
 		return (o1, o2) -> pinyinComparator.compare(keyExtractor.apply(o1), keyExtractor.apply(o2));
 	}
+
+	/**
+	 * 索引比较器
+	 *
+	 * @param keyExtractor 从对象中提取中文(参与比较的内容)
+	 * @param objs         参与排序的数组，数组的元素位置决定了对象的排序先后
+	 * @param <T>          对象类型
+	 * @param <U>          数组对象类型
+	 * @return 索引比较器
+	 * @since 5.8.0
+	 */
+	public static <T, U> Comparator<T> comparingIndexed(Function<? super T, ? extends U> keyExtractor, U... objs) {
+		return comparingIndexed(keyExtractor, false, objs);
+	}
+
+	/**
+	 * 索引比较器
+	 *
+	 * @param keyExtractor 从对象中提取排序键的函数(参与比较的内容)
+	 * @param atEndIfMiss  如果不在列表中是否排在后边
+	 * @param objs         参与排序的数组，数组的元素位置决定了对象的排序先后
+	 * @param <T>          对象类型
+	 * @param <U>          数组对象类型
+	 * @return 索引比较器
+	 * @since 5.8.0
+	 */
+	public static <T, U> Comparator<T> comparingIndexed(Function<? super T, ? extends U> keyExtractor, boolean atEndIfMiss, U... objs) {
+		Objects.requireNonNull(keyExtractor);
+		IndexedComparator<U> indexedComparator = new IndexedComparator<>(atEndIfMiss, objs);
+		return (o1, o2) -> indexedComparator.compare(keyExtractor.apply(o1), keyExtractor.apply(o2));
+	}
 }