From 62656e061f81fe3a14747205fbb99ad21b062e13 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jo=CC=88rg=20Prante?= <joergprante@gmail.com>
Date: Thu, 23 Jun 2022 14:15:24 +0200
Subject: [PATCH] avoid NPE in escapeValue()

---
 groovy-ldap/src/main/java/org/xbib/groovy/ldap/LDAP.java | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/groovy-ldap/src/main/java/org/xbib/groovy/ldap/LDAP.java b/groovy-ldap/src/main/java/org/xbib/groovy/ldap/LDAP.java
index 439e67e..e02c9c9 100644
--- a/groovy-ldap/src/main/java/org/xbib/groovy/ldap/LDAP.java
+++ b/groovy-ldap/src/main/java/org/xbib/groovy/ldap/LDAP.java
@@ -384,6 +384,9 @@ public class LDAP {
     }
 
     public static String escapeValue(String filter) {
+        if (filter == null) {
+            return null;
+        }
         StringBuilder sb = new StringBuilder();
         for (int i = 0; i < filter.length(); i++) {
             switch (filter.charAt(i)) {
@@ -423,5 +426,4 @@ public class LDAP {
         }
         return sb.toString();
     }
-
 }