From d88985f7ee6292058d8ba017dc7ee50217df6bf3 Mon Sep 17 00:00:00 2001
From: mjkhan21 <mjkhan21@xit.co.kr>
Date: Mon, 2 Sep 2024 15:23:07 +0900
Subject: [PATCH] =?UTF-8?q?dateDiff(Date,=20int)=20->=20add(Date,=20int)?=
 =?UTF-8?q?=20=EC=88=98=EC=A0=95,=20getDates(Date,=20int)=20=EC=B6=94?=
 =?UTF-8?q?=EA=B0=80?=
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---
 .../foundation/component/AbstractBean.java    | 27 +++++++++++++++++--
 1 file changed, 25 insertions(+), 2 deletions(-)

diff --git a/src/main/java/cokr/xit/foundation/component/AbstractBean.java b/src/main/java/cokr/xit/foundation/component/AbstractBean.java
index 7244100..e19ab17 100644
--- a/src/main/java/cokr/xit/foundation/component/AbstractBean.java
+++ b/src/main/java/cokr/xit/foundation/component/AbstractBean.java
@@ -1,6 +1,9 @@
 package cokr.xit.foundation.component;
 
+import java.util.Collections;
 import java.util.Date;
+import java.util.List;
+import java.util.stream.IntStream;
 
 import javax.annotation.Resource;
 
@@ -92,12 +95,32 @@ public abstract class AbstractBean extends AbstractComponent {
 		return isEmpty(logName) ? super.log() : Log.get(logName);
 	}
 
-	/**주어진 Date에 지정한 날짜수만큼의 차이의 Date를 반환한다.
+	/**주어진 날짜에 지정한 수만큼 더한 날짜를 반환한다.
 	 * @param date 날짜
 	 * @param days 날짜수
 	 * @return 새 Date
 	 */
-	protected static Date dateDiff(Date date, int days) {
+	protected static Date add(Date date, int days) {
 		return new Date(date.getTime() + (1000L * 60L * 60L * 24L * days));
 	}
+
+	/**주어진 날짜부터 지정한 수만큼 증가하는 날짜들을 반환한다.
+	 * @param date 날짜
+	 * @param days 날짜수
+	 * <ul><li>0이면 기준일</li>
+	 *     <li>0보다 크면 기준일부터 이후 날짜</li>
+	 *     <li>0보다 작으면 기준일부터 이전 날짜</li>
+	 * </ul>
+	 * @return 주어진 날짜부터 지정한 날짜수만큼 더한 날짜들
+	 */
+	protected static List<Date> getDates(Date date, int days) {
+		if (date == null)
+			return Collections.emptyList();
+		if (days == 0)
+			return List.of(date);
+
+		return IntStream.range(0, Math.abs(days)).boxed()
+			.map(num -> add(date, days > 0 ? num : -num))
+			.toList();
+	}
 }
\ No newline at end of file