[Add] CacheStore-local 添加 SetCacheStore 的实现, 添加 CacheStoreFactory 的实现;

[Add] HashSetCacheStore 添加基于 HashSet 的 SetCacheStore 实现;
[Add] LocalCacheStoreFactory 增加本地缓存库的 CacheStoreFactory;

ContentGrabbingJi-CacheStore-local/src/main/java/net/lamgc/cgj/bot/cache/local/HashSetCacheStore.java

@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2020  LamGC
+ *
+ * ContentGrabbingJi is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * ContentGrabbingJi is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package net.lamgc.cgj.bot.cache.local;
+
+import net.lamgc.cgj.bot.cache.SetCacheStore;
+
+import java.util.*;
+
+/**
+ *
+ * @param <E> 元素类型.
+ * @author LamGC
+ */
+public class HashSetCacheStore<E> extends LocalCollectionCacheStore<E, Set<E>> implements SetCacheStore<E> {
+
+    @Override
+    protected Set<E> getCacheItemCollection(String key, boolean create) {
+        Map<String, CacheItem<Set<E>>> cacheMap = getCacheMap();
+        if (!cacheMap.containsKey(key)) {
+            if (create) {
+                cacheMap.put(key, new CacheItem<>(new HashSet<>()));
+            } else {
+                return null;
+            }
+        }
+        return cacheMap.get(key).getValue();
+    }
+
+}

ContentGrabbingJi-CacheStore-local/src/main/java/net/lamgc/cgj/bot/cache/local/LocalCacheStoreFactory.java

@@ -0,0 +1,51 @@
+/*
+ * Copyright (C) 2020  LamGC
+ *
+ * ContentGrabbingJi is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * ContentGrabbingJi is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package net.lamgc.cgj.bot.cache.local;
+
+import net.lamgc.cgj.bot.cache.*;
+import net.lamgc.cgj.bot.cache.convert.StringConverter;
+
+/**
+ * 本地缓存存储容器工厂.
+ * 最快速但又是最占内存的方法, 适用于远端缓存失效, 或无远端缓存的情况下使用.
+ * 最简单的缓存实现, 无持久化功能.
+ * @author LamGC
+ */
+public class LocalCacheStoreFactory implements CacheStoreFactory {
+
+    @Override
+    public <V> SingleCacheStore<V> newSingleCacheStore(String identify, StringConverter<V> converter) {
+        return new HashSingleCacheStore<>();
+    }
+
+    @Override
+    public <V> ListCacheStore<V> newListCacheStore(String identify, StringConverter<V> converter) {
+        return new CopyOnWriteArrayListCacheStore<>();
+    }
+
+    @Override
+    public <V> SetCacheStore<V> newSetCacheStore(String identify, StringConverter<V> converter) {
+        return new HashSetCacheStore<>();
+    }
+
+    @Override
+    public <V> MapCacheStore<V> newMapCacheStore(String identify, StringConverter<V> converter) {
+        return new HashMapCacheStore<>();
+    }
+
+}