From b69e49d63d13de1ec3d5250518f7338c63155f36 Mon Sep 17 00:00:00 2001
From: tsantalis <tsantalis@gmail.com>
Date: Sat, 4 Jan 2025 19:35:24 -0500
Subject: [PATCH] Exception fix

---
 src/main/java/gr/uom/java/xmi/diff/UMLModelDiff.java | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/src/main/java/gr/uom/java/xmi/diff/UMLModelDiff.java b/src/main/java/gr/uom/java/xmi/diff/UMLModelDiff.java
index 5373a4e2f..c81600058 100644
--- a/src/main/java/gr/uom/java/xmi/diff/UMLModelDiff.java
+++ b/src/main/java/gr/uom/java/xmi/diff/UMLModelDiff.java
@@ -4456,9 +4456,14 @@ else if(mapping instanceof CompositeStatementObjectMapping && !mapper.getNonMapp
 	}
 
 	private static boolean samePackage(AbstractCodeMapping mapping) {
-		String filePathBefore = mapping.getFragment1().getLocationInfo().getFilePath().substring(0, mapping.getFragment1().getLocationInfo().getFilePath().lastIndexOf("/"));
-		String filePathAfter = mapping.getFragment2().getLocationInfo().getFilePath().substring(0, mapping.getFragment2().getLocationInfo().getFilePath().lastIndexOf("/"));
-		return filePathBefore.equals(filePathAfter);
+		String filePath1 = mapping.getFragment1().getLocationInfo().getFilePath();
+		String filePath2 = mapping.getFragment2().getLocationInfo().getFilePath();
+		if(filePath1.contains("/") && filePath2.contains("/")) {
+			String filePathBefore = filePath1.substring(0, filePath1.lastIndexOf("/"));
+			String filePathAfter = filePath2.substring(0, filePath2.lastIndexOf("/"));
+			return filePathBefore.equals(filePathAfter);
+		}
+		return false;
 	}
 
 	private boolean skipRefactoring(Set<AbstractCodeMapping> mappings) {