From f600ab94d02bd26b1c00b121735044b56016f29c Mon Sep 17 00:00:00 2001
From: Kakhnovich Raman <roma3122001@gmail.com>
Date: Mon, 8 Dec 2025 19:00:30 +0300
Subject: [PATCH 1/2] Fix case when not properly considering missing xmp entry

---
 .../org/verapdf/gf/model/impl/cos/GFCosInfo.java   | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/validation-model/src/main/java/org/verapdf/gf/model/impl/cos/GFCosInfo.java b/validation-model/src/main/java/org/verapdf/gf/model/impl/cos/GFCosInfo.java
index a4fcd523c..04eb23ad0 100644
--- a/validation-model/src/main/java/org/verapdf/gf/model/impl/cos/GFCosInfo.java
+++ b/validation-model/src/main/java/org/verapdf/gf/model/impl/cos/GFCosInfo.java
@@ -211,11 +211,14 @@ public Boolean getdoCreationDatesMatch() {
             }
         }
         String creationDate = getCreationDate();
-        if (xmpCreateDate != null && creationDate != null) {
+        if (creationDate == null) {
+            return null;
+        }
+        if (xmpCreateDate != null) {
             Calendar creationDateCalendar = TypeConverter.parseDate(creationDate);
             return creationDateCalendar != null && xmpCreateDate.compareTo(creationDateCalendar) == 0;
         }
-        return null;
+        return false;
     }
 
     @Override
@@ -228,11 +231,14 @@ public Boolean getdoModDatesMatch() {
             }
         }
         String modDate = getModDate();
-        if (xmpModifyDate != null && modDate != null) {
+        if (modDate == null) {
+            return null;
+        }
+        if (xmpModifyDate != null) {
             Calendar modDateCalendar = TypeConverter.parseDate(modDate);
             return modDateCalendar != null && xmpModifyDate.compareTo(modDateCalendar) == 0;
         }
-        return null;
+        return false;
     }
 
     @Override

From df3305d9b22c3b723d9d230fe13dc6ed95dc70e2 Mon Sep 17 00:00:00 2001
From: Kakhnovich Raman <roma3122001@gmail.com>
Date: Mon, 8 Dec 2025 19:21:20 +0300
Subject: [PATCH 2/2] Update GFCosInfo.java

---
 .../org/verapdf/gf/model/impl/cos/GFCosInfo.java | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/validation-model/src/main/java/org/verapdf/gf/model/impl/cos/GFCosInfo.java b/validation-model/src/main/java/org/verapdf/gf/model/impl/cos/GFCosInfo.java
index 04eb23ad0..3696a72c9 100644
--- a/validation-model/src/main/java/org/verapdf/gf/model/impl/cos/GFCosInfo.java
+++ b/validation-model/src/main/java/org/verapdf/gf/model/impl/cos/GFCosInfo.java
@@ -203,6 +203,10 @@ public String getXMPDescription() {
 
     @Override
     public Boolean getdoCreationDatesMatch() {
+        String creationDate = getCreationDate();
+        if (creationDate == null) {
+            return null;
+        }
         Calendar xmpCreateDate = null;
         if (meta != null) {
             try {
@@ -210,10 +214,6 @@ public Boolean getdoCreationDatesMatch() {
             } catch (XMPException ignored) {
             }
         }
-        String creationDate = getCreationDate();
-        if (creationDate == null) {
-            return null;
-        }
         if (xmpCreateDate != null) {
             Calendar creationDateCalendar = TypeConverter.parseDate(creationDate);
             return creationDateCalendar != null && xmpCreateDate.compareTo(creationDateCalendar) == 0;
@@ -223,6 +223,10 @@ public Boolean getdoCreationDatesMatch() {
 
     @Override
     public Boolean getdoModDatesMatch() {
+        String modDate = getModDate();
+        if (modDate == null) {
+            return null;
+        }
         Calendar xmpModifyDate = null;
         if (meta != null) {
             try {
@@ -230,10 +234,6 @@ public Boolean getdoModDatesMatch() {
             } catch (XMPException ignored) {
             }
         }
-        String modDate = getModDate();
-        if (modDate == null) {
-            return null;
-        }
         if (xmpModifyDate != null) {
             Calendar modDateCalendar = TypeConverter.parseDate(modDate);
             return modDateCalendar != null && xmpModifyDate.compareTo(modDateCalendar) == 0;