From 06c3af9350bb8a7a0469922f11609704d84b4e86 Mon Sep 17 00:00:00 2001
From: LamGC <lam827@lamgc.net>
Date: Fri, 4 Sep 2020 23:30:35 +0800
Subject: [PATCH] =?UTF-8?q?[Change]=20=E8=A1=A5=E5=85=85=20HashMapCacheSto?=
 =?UTF-8?q?re=20=E5=AF=B9=E5=8F=82=E6=95=B0=E7=9A=84=20null=20=E6=A3=80?=
 =?UTF-8?q?=E6=9F=A5;?=
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[Change] HashMapCacheStore 增加对参数的 null 检查, 及时抛出 NPE;
---
 .../java/net/lamgc/cgj/bot/cache/local/HashMapCacheStore.java   | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ContentGrabbingJi-CacheStore-local/src/main/java/net/lamgc/cgj/bot/cache/local/HashMapCacheStore.java b/ContentGrabbingJi-CacheStore-local/src/main/java/net/lamgc/cgj/bot/cache/local/HashMapCacheStore.java
index 8de517b..1c10794 100644
--- a/ContentGrabbingJi-CacheStore-local/src/main/java/net/lamgc/cgj/bot/cache/local/HashMapCacheStore.java
+++ b/ContentGrabbingJi-CacheStore-local/src/main/java/net/lamgc/cgj/bot/cache/local/HashMapCacheStore.java
@@ -38,7 +38,7 @@ public class HashMapCacheStore<V> extends HashCacheStore<Map<String, V>> impleme
 
     @Override
     public Set<String> mapFieldSet(String key) {
-        return getMap(key, false, Map::keySet, null);
+        return getMap(key, false, map -> Collections.unmodifiableSet(map.keySet()), null);
     }
 
     @Override