From a37cdbbbabd8d7bc8dbb3a8498fdd7534e6ac696 Mon Sep 17 00:00:00 2001
From: forge-bot <bot@forge.local>
Date: Sat, 18 Jul 2026 11:16:29 +0000
Subject: [PATCH] =?UTF-8?q?[=EA=B3=B5=ED=86=B5]=20util=20=E2=86=92=20frame?=
 =?UTF-8?q?work=20=EC=9C=A0=ED=8B=B8=20(ACM-CM-002)?=
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---
 .../acquirecore/framework/util/DateUtil.java  | 91 +++++++++++++++++++
 1 file changed, 91 insertions(+)
 create mode 100644 boot/common-framework/src/main/java/com/klaro/acquirecore/framework/util/DateUtil.java

diff --git a/boot/common-framework/src/main/java/com/klaro/acquirecore/framework/util/DateUtil.java b/boot/common-framework/src/main/java/com/klaro/acquirecore/framework/util/DateUtil.java
new file mode 100644
index 0000000..72b8216
--- /dev/null
+++ b/boot/common-framework/src/main/java/com/klaro/acquirecore/framework/util/DateUtil.java
@@ -0,0 +1,91 @@
+package com.klaro.acquirecore.framework.util;
+
+import java.time.LocalDate;
+import java.time.format.DateTimeFormatter;
+import java.time.temporal.ChronoUnit;
+
+/**
+ * Static utility class for date operations migrated from legacy C util_date.c
+ */
+public final class DateUtil {
+
+    private static final DateTimeFormatter DEFAULT_FORMATTER = DateTimeFormatter.ISO_LOCAL_DATE;
+
+    private DateUtil() {
+        // Utility class - prevent instantiation
+    }
+
+    public static LocalDate of(int year, int month, int day) {
+        return LocalDate.of(year, month, day);
+    }
+
+    public static String toString(LocalDate date) {
+        return date == null ? null : date.format(DEFAULT_FORMATTER);
+    }
+
+    public static String format(LocalDate date, String pattern) {
+        return date == null ? null : date.format(DateTimeFormatter.ofPattern(pattern));
+    }
+
+    public static LocalDate fromString(String str) {
+        if (str == null || str.isEmpty()) return null;
+        return LocalDate.parse(str, DEFAULT_FORMATTER);
+    }
+
+    public static LocalDate parse(String str, String pattern) {
+        if (str == null || str.isEmpty()) return null;
+        return LocalDate.parse(str, DateTimeFormatter.ofPattern(pattern));
+    }
+
+    public static long diffDays(LocalDate a, LocalDate b) {
+        if (a == null || b == null) throw new IllegalArgumentException("Dates must not be null");
+        return ChronoUnit.DAYS.between(b, a);
+    }
+
+    public static int compare(LocalDate a, LocalDate b) {
+        if (a == null || b == null) throw new IllegalArgumentException("Dates must not be null");
+        return a.compareTo(b);
+    }
+
+    public static LocalDate addDays(LocalDate date, long days) {
+        if (date == null) throw new IllegalArgumentException("Date must not be null");
+        return date.plusDays(days);
+    }
+
+    public static LocalDate subtractDays(LocalDate date, long days) {
+        if (date == null) throw new IllegalArgumentException("Date must not be null");
+        return date.minusDays(days);
+    }
+
+    public static int getYear(LocalDate date) {
+        if (date == null) throw new IllegalArgumentException("Date must not be null");
+        return date.getYear();
+    }
+
+    public static int getMonth(LocalDate date) {
+        if (date == null) throw new IllegalArgumentException("Date must not be null");
+        return date.getMonthValue();
+    }
+
+    public static int getDay(LocalDate date) {
+        if (date == null) throw new IllegalArgumentException("Date must not be null");
+        return date.getDayOfMonth();
+    }
+
+    public static LocalDate now() {
+        return LocalDate.now();
+    }
+
+    public static boolean isBefore(LocalDate a, LocalDate b) {
+        return a != null && b != null && a.isBefore(b);
+    }
+
+    public static boolean isAfter(LocalDate a, LocalDate b) {
+        return a != null && b != null && a.isAfter(b);
+    }
+
+    public static boolean isEqual(LocalDate a, LocalDate b) {
+        if (a == null && b == null) return true;
+        return a != null && b != null && a.isEqual(b);
+    }
+}