Rename and clean up MapleShopFactory

src/main/java/server/ShopFactory.java

@@ -0,0 +1,71 @@
+/*
+	This file is part of the OdinMS Maple Story Server
+    Copyright (C) 2008 Patrick Huy <patrick.huy@frz.cc>
+		       Matthias Butz <matze@odinms.de>
+		       Jan Christian Meyer <vimes@odinms.de>
+
+    This program 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 version 3 as published by
+    the Free Software Foundation. You may not use, modify or distribute
+    this program under any other version of the GNU Affero General Public
+    License.
+
+    This program 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 <http://www.gnu.org/licenses/>.
+*/
+package server;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * @author Matze
+ */
+public class ShopFactory {
+    private static final ShopFactory instance = new ShopFactory();
+
+    public static ShopFactory getInstance() {
+        return instance;
+    }
+
+    private final Map<Integer, Shop> shops = new HashMap<>();
+    private final Map<Integer, Shop> npcShops = new HashMap<>();
+
+    private Shop loadShop(int id, boolean isShopId) {
+        Shop ret = Shop.createFromDB(id, isShopId);
+        if (ret != null) {
+            shops.put(ret.getId(), ret);
+            npcShops.put(ret.getNpcId(), ret);
+        } else if (isShopId) {
+            shops.put(id, null);
+        } else {
+            npcShops.put(id, null);
+        }
+        return ret;
+    }
+
+    public Shop getShop(int shopId) {
+        if (shops.containsKey(shopId)) {
+            return shops.get(shopId);
+        }
+        return loadShop(shopId, true);
+    }
+
+    public Shop getShopForNPC(int npcId) {
+        if (npcShops.containsKey(npcId)) {
+            return npcShops.get(npcId);
+        }
+        return loadShop(npcId, false);
+    }
+
+    public void reloadShops() {
+        shops.clear();
+        npcShops.clear();
+    }
+}