PDFBOX-6061: avoid NPE as suggested by Jacobo Aragunde; closes #243

THausherr · THausherr · commit 14c6f88e0fa9 · 2025-09-04T12:29:14.000Z
git-svn-id: https://svn.apache.org/repos/asf/pdfbox/trunk@1928232 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/pdfbox/src/main/java/org/apache/pdfbox/cos/COSDictionary.java b/pdfbox/src/main/java/org/apache/pdfbox/cos/COSDictionary.java
@@ -105,8 +105,9 @@ public COSName getKeyForValue(Object value)
         {
             Object nextValue = entry.getValue();
             if (nextValue.equals(value)
-                    || (nextValue instanceof COSObject && ((COSObject) nextValue).getObject()
-                            .equals(value)))
+                    || (nextValue instanceof COSObject && 
+                        !((COSObject) nextValue).isObjectNull() && 
+                        ((COSObject) nextValue).getObject().equals(value)))
             {
                 return entry.getKey();
             }

Original file line number	Diff line number	Diff line change
`@@ -105,8 +105,9 @@ public COSName getKeyForValue(Object value)`
`105`	`105`	`{`
`106`	`106`	`Object nextValue = entry.getValue();`
`107`	`107`	`if (nextValue.equals(value)`
`108`		`- \|\| (nextValue instanceof COSObject && ((COSObject) nextValue).getObject()`
`109`		`- .equals(value)))`
	`108`	`+ \|\| (nextValue instanceof COSObject &&`
	`109`	`+ !((COSObject) nextValue).isObjectNull() &&`
	`110`	`+ ((COSObject) nextValue).getObject().equals(value)))`
`110`	`111`	`{`
`111`	`112`	`return entry.getKey();`
`112`	`113`	`}`