From 3a3effca652a8d687f90c47b829acf5329807926 Mon Sep 17 00:00:00 2001
From: PJ Fanning <fanningpj@apache.org>
Date: Thu, 13 Feb 2025 10:53:16 +0000
Subject: [PATCH] [bug-69583] when copying cells with dates - prefer using the
 numeric data directly

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1923780 13f79535-47bb-0310-9956-ffa450edef68
---
 .../org/apache/poi/ss/usermodel/DateUtil.java |  1 +
 .../poi/ss/util/BaseTestCellUtilCopy.java     | 27 +++++++++++++++++++
 2 files changed, 28 insertions(+)

diff --git a/poi/src/main/java/org/apache/poi/ss/usermodel/DateUtil.java b/poi/src/main/java/org/apache/poi/ss/usermodel/DateUtil.java
index 6cbac9e0fb..42034ec000 100644
--- a/poi/src/main/java/org/apache/poi/ss/usermodel/DateUtil.java
+++ b/poi/src/main/java/org/apache/poi/ss/usermodel/DateUtil.java
@@ -727,6 +727,7 @@ public class DateUtil {
             case 0x0f:
             case 0x10:
             case 0x11:
+            // the 0x12 to 0x15 formats are time (only) formats
             case 0x12:
             case 0x13:
             case 0x14:
diff --git a/poi/src/test/java/org/apache/poi/ss/util/BaseTestCellUtilCopy.java b/poi/src/test/java/org/apache/poi/ss/util/BaseTestCellUtilCopy.java
index ea214e815d..14d3fa00a1 100644
--- a/poi/src/test/java/org/apache/poi/ss/util/BaseTestCellUtilCopy.java
+++ b/poi/src/test/java/org/apache/poi/ss/util/BaseTestCellUtilCopy.java
@@ -146,6 +146,33 @@ public abstract class BaseTestCellUtilCopy {
         wb.close();
     }
 
+    @Test
+    public final void testCopyCellTime() throws IOException {
+        try(
+                Workbook srcWb = createNewWorkbook();
+                Workbook destWb = createNewWorkbook()
+        ) {
+            final Row rowS = srcWb.createSheet("Sheet1").createRow(0);
+            final Row rowD = destWb.createSheet("Sheet1").createRow(0);
+            srcCell = rowS.createCell(0);
+            destCell = rowD.createCell(0);
+
+            srcCell.setCellValue(22.0/24.0);
+
+            final CellStyle style = srcWb.createCellStyle();
+            style.setDataFormat((short) 0x12); // time format
+            srcCell.setCellStyle(style);
+
+            final CreationHelper createHelper = srcWb.getCreationHelper();
+
+            final CellCopyPolicy policy = new CellCopyPolicy.Builder().build();
+            CellUtil.copyCell(srcCell, destCell, policy, new CellCopyContext());
+
+            assertEquals(srcCell.getNumericCellValue(), destCell.getNumericCellValue());
+            assertEquals(srcCell.getCellStyle().getDataFormatString(), destCell.getCellStyle().getDataFormatString());
+        }
+    }
+
     private void setUp_testCopyCellFrom_CellCopyPolicy() {
         @SuppressWarnings("resource")
         final Workbook wb = createNewWorkbook();